EP1111655B1 - Seal foil an lamp provided with such a foil - Google Patents
Seal foil an lamp provided with such a foil Download PDFInfo
- Publication number
- EP1111655B1 EP1111655B1 EP00122550A EP00122550A EP1111655B1 EP 1111655 B1 EP1111655 B1 EP 1111655B1 EP 00122550 A EP00122550 A EP 00122550A EP 00122550 A EP00122550 A EP 00122550A EP 1111655 B1 EP1111655 B1 EP 1111655B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- foil
- ruthenium
- lamp
- molybdenum
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000011888 foil Substances 0.000 title claims abstract description 45
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000011733 molybdenum Substances 0.000 claims abstract description 37
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 36
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052707 ruthenium Inorganic materials 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 229910000929 Ru alloy Inorganic materials 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 15
- 230000005496 eutectics Effects 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- OUFGXIPMNQFUES-UHFFFAOYSA-N molybdenum ruthenium Chemical compound [Mo].[Ru] OUFGXIPMNQFUES-UHFFFAOYSA-N 0.000 claims description 2
- 239000004020 conductor Substances 0.000 claims 4
- 238000010276 construction Methods 0.000 claims 1
- -1 either pure or doped Substances 0.000 claims 1
- 150000003304 ruthenium compounds Chemical class 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 229910001182 Mo alloy Inorganic materials 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 229910052804 chromium Inorganic materials 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 229910001507 metal halide Inorganic materials 0.000 description 4
- 150000005309 metal halides Chemical class 0.000 description 4
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000005219 brazing Methods 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 208000034656 Contusions Diseases 0.000 description 1
- 229910015799 MoRu Inorganic materials 0.000 description 1
- 241000917012 Quercus floribunda Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001844 chromium Chemical class 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000006023 eutectic alloy Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/366—Seals for leading-in conductors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/38—Seals for leading-in conductors
Definitions
- the invention relates to a sealing film and associated lamp with this film according to the preamble of claim 1. It is in particular molybdenum foils, which find application in bruises, as they are customary for the sealing of incandescent lamps and discharge lamps.
- the film is provided with a protective layer of Al, Cr, Si, Ti or Ta.
- the thickness is 5 to 100 nm.
- a similar technique is known from DE-A 30 06 846, in which for the same purpose layers of Ta, Nb, V, Cr, Ti, Y, La, Hf or Sc are used.
- the layer thickness is 10 to 200 nm.
- a partial chrome plating is usually used for the protection of the molybdenum foils from oxidation in the area of the foil-pin welded joint.
- the welded joints produced by resistance welding between the pin and the foil are manually inserted up to the height into a sand-like medium up to which the chromium plating is to take place.
- the partial chromium deposition By chemical reactions takes place in a less environmentally friendly process, the partial chromium deposition.
- a higher temperature load capacity of the film-pin connections is achieved. In this case, a temperature load up to 550 ° C is possible.
- the oxidation of the film-pin joints is not responsible for the failure of the foil seal, but the attack of the molybdenum foil by the corrosive filling components (for example metal halides) or also filling gases.
- the molybdenum foil is previously sandblasted, resulting in an improvement of the glass-metal compound. Sandblasting, however, results in resistance welding to high rejects, as this non-conductive Al 2 O 3 particles remain on the Mo film surface.
- the wear of the resistance welding electrodes increases very much. In the case of sandblasted foils replacement of the electrode is necessary after approx. 70 welds (compared to a replacement interval of approx. 1000 welds with untreated foil), so that a frequent change of the electrodes is necessary.
- the molybdenum foil is partially or preferably coated on all sides with pure ruthenium or a compound containing ruthenium.
- a coating material is especially pure ruthenium, as well as a molybdenum-ruthenium alloy with eutectic composition.
- the layer thicknesses of the ruthenium-containing layer are preferably in the range of 0.02 to 1.0 ⁇ m. In a particularly preferred embodiment, the layer thickness is 0.02 to 0.09 microns.
- the coating can be carried out by known coating methods, preferably by sputtering.
- molybdenum foils are very good weldability, in contrast to molybdenum foils, or the like with chromium, silicon, aluminum. are coated.
- the oxidation resistance of the pin-foil welds is increased by coating the current leads with the same or similar coating materials that can be used for the foil.
- the electric lamps according to the invention have a quartz glass or hard glass lamp vessel, which is provided with molybdenum foil feedthroughs that are part of at least one pinch seal of the lamp vessel. In the at least one pinch seal at least one molybdenum foil is pinched gas-tight.
- the molybdenum foil or the molybdenum foils are provided according to the invention with a ruthenium-containing coating.
- the inner power supply is uncoiled and has a diameter of 10 to 100 .mu.m, in particular 10 to 50 microns.
- the inner power supply is simply coiled and has an outer diameter of 20 to 150 .mu.m, in particular 20 to 80 microns.
- a method for producing an electrically conductive connection between a film of molybdenum and a metal wire, in particular with a diameter between 10 and 100 microns, is characterized in that the film with a ruthenium-containing Coating is provided in the area of the contact surface to the wire.
- the wire is made of tungsten in particular.
- the metal wire may simply be coiled, thus forming a coil.
- the outer diameter of the thread can be between 20 and 80 ⁇ m.
- the preferred exemplary embodiment of the invention shown schematically in FIG. 1 is a high-pressure discharge lamp with an electrical power consumption of approximately 24000 W.
- This lamp has a discharge vessel 1 consisting of quartz glass.
- the discharge vessel 1 has a discharge space 2 and two on top of each other On the opposite sides of the discharge space 2 arranged, cylindrical piston shanks 3, of which in the figure only a partial and cut is shown.
- Two tungsten electrodes 4 each extend from the discharge space 2 into one of the piston shafts 3, where they are each soldered to a circular disk-shaped molybdenum disk 7. With the molybdenum disk 7, four molybdenum foils 5 are welded, which are arranged uniformly along the lateral surface of a hollow quartz glass rod 8.
- the hollow quartz glass rod 8 was introduced into the interior of the hollow piston shaft 3 together with the molybdenum foils 5.
- the molybdenum foils 5 form a gastight seal with the quartz glass of the piston skirt 3 and the quartz glass of the hollow quartz glass rod 8.
- the molybdenum foils 5 melted in the quartz glass have a coating 6 of 75 nm ruthenium.
- the electrode 4 is in the range of the piston shaft 3 wrapped with a molybdenum foil 10, which is not melted in the quartz glass.
- the exemplary embodiment of the invention depicted in FIG. 2 is a high-pressure discharge lamp which is capped on one side.
- This lamp has a quartz glass discharge vessel 9, which is crimped on one side and in which an ionizable filling comprising corrosive metal halides is enclosed in a gas-tight manner.
- two electrodes 22, 23 are arranged, each of which is electrically conductively connected via a molybdenum foil 24, 25 embedded in the pinch seal of the discharge vessel 9 with a respective power supply 26, 27 projecting from the discharge vessel 9.
- the discharge vessel 9 is, at a short distance, completely surrounded by a single-sided squeezed, gas-tight sealed envelope bulb 28.
- the enveloping bulb 28 is made of quartz glass, which is doped with about 0.5 percent by weight of cerium. Within the enveloping piston 28 is nitrogen gas, which has a cold filling pressure between 600 mbar to 700 mbar at room temperature.
- the outgoing from the discharge vessel power supply lines 26, 27 are each electrically connected via a molybdenum foil 29, 30 embedded in the squeezing of the enveloping piston 28, each with a led out of the enveloping bulb 28 power supply 11, 12.
- An unilaterally squeezed and unilaterally socked outer bulb 13 encloses the enveloping bulb 28 gas-tight.
- the outer bulb 13 is evacuated and also consists of a doped with about 0.5 weight percent cerium quartz glass.
- the led out of the enveloping bulb 28 power supply lines 11, 12 are each electrically connected via a molybdenum foil 14, 15 embedded in the pinch seal of the outer bulb 13, each with a current from the outer bulb 13 power supply 16, 17.
- the led out of the outer bulb 13 power supply lines 16, 17 are connected to the protruding from the base 18 pins 19, 20 in electrical contact.
- the molybdenum foils used in this embodiment are all coated with a Mo-Ru eutectic alloy whose thickness is 500 nm.
- the composition is molybdenum 43% by weight, ruthenium 57% by weight (preferably at least 40%, advantageously more than 50% ruthenium).
- the power supply lines 26, 12 and 17 are coated with a Mo-Ru alloy.
- a halogen incandescent lamp 35 (12V at 100 W power) with a lamp bulb 36 made of quartz glass, with Help a pinch seal 37 is gas-tight.
- two molybdenum foils 38 are embedded.
- Within the lamp bulb is a double-spiraled filament 39, the single-turn ends act as an inner power supply 40.
- the inner power supply lines are each welded to one of the embedded in the pinch seal molybdenum foil 38.
- From the pinch seal 37 protrude two outer power supply lines 34, which are connected to one of the two molybdenum foils.
- the two molybdenum foils embedded in the pinch seal are coated on one side with a 90 nm thick Mo-Ru alloy eutectic Mo-Ru alloy on the side to which the power supply 40 is attached.
- the Wendelende 40 consists of 15 microns thick tungsten wire, which is simply coiled. Its outer diameter is 55 ⁇ m. The helical end and the foil are connected together by a brazing process.
- the particular advantage is that hitherto for the resistance welding a powder layer (molybdenum with coarse grain size) had to be used, in which the coil was pressed. When, current passage of the welding process, there were several shunts due to the inhomogeneous powder layer. This led to high rejection and limited the lower limit of the outer diameter of the single-turn power supply to about 80 microns, while according to the invention also corresponding outer diameter between 20 and 60 microns are processed.
- the ruthenium coating thus allows an improved connection between film and power supply, this principle applies both to the inner and the outer power supply. in general, however, the internal power supplies are more critical. Therefore, the ruthenium coating can be applied on one side of the film only in the vicinity of the contact surface of the power supply.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
Die Erfindung betrifft eine Einschmelzfolie und zugehörige Lampe mit dieser Folie gemäß dem Oberbegriff des Anspruchs 1. Es handelt sich dabei insbesondere um Molybdänfolien, die Anwendung finden bei Quetschungen, wie sie für die Abdichtung von Glühlampen und Entladungslampen üblich sind.The invention relates to a sealing film and associated lamp with this film according to the preamble of
Aus der US-A 5 021 711 ist bereits eine Einschmelzfolie und zugehörige Lampe mit dieser Folie bekannt. Um gegen Oxidation besser geschützt zu sein, ist die Folie mit einer Schutzschicht von Al, Cr, Si, Ti oder Ta versehen. Die Dicke beträgt 5 bis 100 nm.From US-A 5 021 711 a melted film and associated lamp with this film is already known. In order to be better protected against oxidation, the film is provided with a protective layer of Al, Cr, Si, Ti or Ta. The thickness is 5 to 100 nm.
Eine ähnliche Technik ist aus der DE-A 30 06 846 bekannt, in der zum gleichen Zweck Schichten aus Ta, Nb, V, Cr, Ti, Y, La, Hf oder Sc herangezogen werden. Die Schichtdicke liegt bei 10 bis 200 nm.A similar technique is known from DE-A 30 06 846, in which for the same purpose layers of Ta, Nb, V, Cr, Ti, Y, La, Hf or Sc are used. The layer thickness is 10 to 200 nm.
In der Praxis wird für den Schutz der Molybdänfolien vor Oxidation im Bereich der Folien-Stift-Schweißverbindung meist eine partielle Verchromung verwendet. Bei diesem sehr arbeitsaufwendigem Verfahren werden die durch Widerstandsschweißen zwischen Stift und Folie hergestellten Schweißverbindungen von Hand bis zu der Höhe in ein sandähnliches Medium gesteckt bis zu der die Verchromung erfolgen soll. Durch chemische Reaktionen erfolgt in einem wenig umweltfreundlichen Prozeß die partielle Chromabscheidung. Durch diese Chromabscheidung (Oxidationsschutz) wird eine höhere Temperaturbelastbarkeit der Folie-Stift-Verbindungen erreicht. Dabei ist eine Temperaturbelastung bis ca. 550° C möglich.In practice, a partial chrome plating is usually used for the protection of the molybdenum foils from oxidation in the area of the foil-pin welded joint. In this very labor-intensive process, the welded joints produced by resistance welding between the pin and the foil are manually inserted up to the height into a sand-like medium up to which the chromium plating is to take place. By chemical reactions takes place in a less environmentally friendly process, the partial chromium deposition. By this chromium deposition (oxidation protection), a higher temperature load capacity of the film-pin connections is achieved. In this case, a temperature load up to 550 ° C is possible.
Bei einigen Lampen ist nicht die Oxidation der Folie-Stift-Verbindungen für das Versagen der Foilenabdichtung verantwortlich, sondern der Angriff der Molybdänfolie durch die korrosiv wirkenden Füllungsbestandteile (beispielsweise Metallhalogenide) oder auch Füllgase. Zur Einschränkung dieses Angriffs wird die Molybdänfolie bisher sandgestrahlt, was zu einer Verbesserung der Glas-Metall-Verbindung führt. Das Sandstrahlen führt jedoch beim Widerstandsschweißen zu hohem Ausschuß, da dadurch nichtleitende Al2O3-Partikel auf der Mo-Folienoberfläche verbleiben. Außerdem erhöht sich der Verschleiß der Widerstands-Schweißelektroden sehr stark. Bei sandgestrahlten Folien ist ein Austausch der Elektrode bereits nach ca. 70 Schweißungen notwendig (gegenüber einem Austauschintervall von ca. 1000 Schweißungen bei unbehandelter Folie), so daß ein häufiger Wechsel der Elektroden erforderlich ist.In some lamps, the oxidation of the film-pin joints is not responsible for the failure of the foil seal, but the attack of the molybdenum foil by the corrosive filling components (for example metal halides) or also filling gases. To limit this attack, the molybdenum foil is previously sandblasted, resulting in an improvement of the glass-metal compound. Sandblasting, however, results in resistance welding to high rejects, as this non-conductive Al 2 O 3 particles remain on the Mo film surface. In addition, the wear of the resistance welding electrodes increases very much. In the case of sandblasted foils replacement of the electrode is necessary after approx. 70 welds (compared to a replacement interval of approx. 1000 welds with untreated foil), so that a frequent change of the electrodes is necessary.
Es ist Aufgabe der vorliegenden Erfindung, eine Einschmelzfolie gemäß dem Oberbegriff des Anspruchs 1 bereitzustellen, die gut vor Oxidation und Korrosion geschützt ist und bei der nach Möglichkeit trotzdem die Schweißbarkeit gewährleistet bleibt.It is an object of the present invention to provide a sealing film according to the preamble of
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Besonders vorteilhafte Ausgestaltungen finden sich in den abhängigen Ansprüchen.This object is solved by the characterizing features of
Zur Verhinderung der Oxidation und Korrosion und für eine gute Schweißbarkeit wird die Molybdänfolie teilweise oder bevorzugt allseitig mit reinem Ruthenium oder einer Verbindung, die Ruthenium enthält, beschichtet. Als Beschichtungswerkstoff eignet sich vor allem reines Ruthenium, sowie eine Molybdän-Ruthenium-Legierung mit eutektischer Zusammensetzung.To prevent oxidation and corrosion and for good weldability, the molybdenum foil is partially or preferably coated on all sides with pure ruthenium or a compound containing ruthenium. As a coating material is especially pure ruthenium, as well as a molybdenum-ruthenium alloy with eutectic composition.
Die Schichtdicken der Ruthenium-haltigen Schicht liegen bevorzugt im Bereich von 0,02 bis 1,0 µm. In einer besonders bevorzugten Ausführungsform liegt die Schichtdicke bei 0,02 bis 0,09 µm.The layer thicknesses of the ruthenium-containing layer are preferably in the range of 0.02 to 1.0 μm. In a particularly preferred embodiment, the layer thickness is 0.02 to 0.09 microns.
Das Beschichten kann durch bekannte Beschichtungsverfahren erfolgen, vorzugsweise durch Sputtern.The coating can be carried out by known coating methods, preferably by sputtering.
Die mit Ruthenium oder Ruthenium-Legierungen beschichteten Molybdänfolien sind sehr gut schweißbar, im Gegensatz zu Molybdänfolien, die mit Chrom, Silizium, Aluminium o.ä. beschichtet sind.The coated with ruthenium or ruthenium alloys molybdenum foils are very good weldability, in contrast to molybdenum foils, or the like with chromium, silicon, aluminum. are coated.
In einer bevorzugten Ausführungsform wird die Oxidationsbeständigkeit der Stift-Folie-Schweißverbindungen durch Beschichten der Stromzuführungen mit gleichen oder ähnlichen Beschichtungswerkstoffen, die für die Folie eingesetzt werden können, erhöht.In a preferred embodiment, the oxidation resistance of the pin-foil welds is increased by coating the current leads with the same or similar coating materials that can be used for the foil.
Die erfindungsgemäßen elektrischen Lampen besitzen ein Lampengefäß aus Quarzglas oder Hartglas, das mit Molybdänfoliendurchführungen versehen ist, die Bestandteil mindestens einer Quetschdichtung des Lampengefäßes sind. In der mindestens einen Quetschdichtung ist wenigstens eine Molybdänfolie gasdicht eingequetscht. Die Molybdänfolie bzw. die Molybdänfolien sind erfindungsgemäß mit Ruthenium-haltiger Beschichtung versehen.The electric lamps according to the invention have a quartz glass or hard glass lamp vessel, which is provided with molybdenum foil feedthroughs that are part of at least one pinch seal of the lamp vessel. In the at least one pinch seal at least one molybdenum foil is pinched gas-tight. The molybdenum foil or the molybdenum foils are provided according to the invention with a ruthenium-containing coating.
Die Aufbringung einer Schicht aus Ruthenium (rein bzw. als Legierung) auf die Folie erlaubt es erstmals, filigrane Stromzuführungen (u.U. als Gewickel ausgeführt) sicher und einfach mit der Folie zu verbinden. Statt des bisher verwendeten Widerstandsschweißens unter Zuhilfenahme einer Paste (Molybdän oder Platin), das nur für massive Stromzuführungen geeignet ist bzw. bei filigranen Stromzuführungen einen sehr hohen Ausschuss in Kauf nimmt, kann jetzt ein Hartlöt-Prozeß durchgeführt werden (bevorzugt unter Verwendung einer eutektischen MoRu-Legierung), für den relativ niedrige Temperaturen ausreichen (typisch etwa 360 °C weniger als bei reinem Ru). Statt etwa 2300 °C werden nur noch Temperaturen um 1900 bis 2000 °C erreicht.The application of a layer of ruthenium (pure or as an alloy) to the film makes it possible for the first time to reliably and simply connect filigree power supply lines (in some cases as convolutions) to the film. Instead of the previously used resistance welding with the aid of a paste (molybdenum or platinum), which is only suitable for massive power supply or filigree power supply takes a very high margin in purchasing, now a brazing process can be performed (preferably using a eutectic MoRu Alloy) for which relatively low temperatures suffice (typically about 360 ° C less than pure Ru). Instead of about 2300 ° C only temperatures around 1900 to 2000 ° C are reached.
Bevorzugt ist die innere Stromzuführung ungewendelt und besitzt einen Durchmesser von 10 bis 100 µm, insbesondere 10 bis 50 µm.Preferably, the inner power supply is uncoiled and has a diameter of 10 to 100 .mu.m, in particular 10 to 50 microns.
In einer besonders bevorzugten Ausführungsform ist die innere Stromzuführung einfach gewendelt und besitzt einen äußeren Durchmesser von 20 bis 150 µm, insbesondere 20 bis 80 µm.In a particularly preferred embodiment, the inner power supply is simply coiled and has an outer diameter of 20 to 150 .mu.m, in particular 20 to 80 microns.
Ein Verfahren zum Herstellen einer elektrisch leitenden Verbindung zwischen einer Folie aus Molybdän und einem Metalldraht, insbesondere mit einem Durchmesser zwischen 10 und 100 µm, zeichnet sich dadurch aus, daß die Folie mit einer Ruthenium-haltigen Beschichtung im Bereich der Kontaktfläche zum Draht ausgestattet ist. Der Draht ist insbesondere aus Wolfram gefertigt.A method for producing an electrically conductive connection between a film of molybdenum and a metal wire, in particular with a diameter between 10 and 100 microns, is characterized in that the film with a ruthenium-containing Coating is provided in the area of the contact surface to the wire. The wire is made of tungsten in particular.
In einer zweiten Ausführungsform kann der Metalldraht einfach gewendelt sein und somit ein Gewickel bilden. Insbesondere kann der Außendurchmesser des Gewickels zwischen 20 und 80 µm betragen.In a second embodiment, the metal wire may simply be coiled, thus forming a coil. In particular, the outer diameter of the thread can be between 20 and 80 μm.
Im folgenden soll die Erfindung anhand mehrerer Ausführungsbeispiele näher erläutert werden. Es zeigen:
Figur 1- eine Metallhalogenidlampe, im Schnitt
Figur 2- ein weiteres Ausführungsbeispiel einer Glühlampe, im Schnitt
Figur 3- ein weiteres Ausführungsbeispiel einer Metallhalogenidlampe als Ausschnitt
- FIG. 1
- a metal halide lamp, in section
- FIG. 2
- another embodiment of an incandescent lamp, in section
- FIG. 3
- a further embodiment of a metal halide lamp as a detail
Bei dem bevorzugten, in der Figur 1 schematisch dargestellten Ausführungsbeispiel der Erfindung handelt es sich um eine Hochdruckentladungslampe mit einer elektrischen Leistungsaufnahme von ca. 24000 W. Diese Lampe besitzt ein aus Quarzglas bestehendes Entladungsgefäß 1. Das Entladungsgefäß 1 weist einen Entladungsraum 2 und zwei auf einander gegenüberliegenden Seiten des Entladungsraumes 2 angeordnete, zylindrische Kolbenschäfte 3 auf, von denen in der Figur nur einer ausschnittweise und geschnitten abgebildet ist. Zwei Elektroden 4 aus Wolfram erstrecken sich jeweils vom Entladungsraum 2 in einen der Kolbenschäfte 3 und sind dort jeweils mit einer kreisscheibenförmigen Molybdänscheibe 7 verlötet. Mit der Molybdänscheibe 7 sind vier Molybdänfolien 5 verschweißt, die gleichmäßig entlang der Mantelfläche eines hohlen Quarzglasstabes 8 angeordnet sind. Der hohle Quarzglasstab 8 wurde zusammen mit den Molybdänfolien 5 in das Innere des hohlen Kolbenschaftes 3 eingeführt. Die Molybdänfolien 5 bilden mit dem Quarzglas des Kolbenschaftes 3 und dem Quarzglas des hohlen Quarzglasstabes 8 eine gasdichte Einschmelzung. Die im Quarzglas eingeschmolzenen Molybdänfolien 5 weisen eine Beschichtung 6 von 75 nm Ruthenium auf. Die Elektrode 4 ist im Bereich des Kolbenschaftes 3 mit einer Molybdänfolie 10 umwickelt, die aber nicht im Quarzglas eingeschmolzen ist.The preferred exemplary embodiment of the invention shown schematically in FIG. 1 is a high-pressure discharge lamp with an electrical power consumption of approximately 24000 W. This lamp has a
Beim in der Figur 2 abgebildeten Ausführungsbeispiel der Erfindung handelt es sich um eine einseitig gesockelte Hochdruckentladungslampe. Diese Lampe besitzt ein einseitig gequetschtes Entladungsgefäß 9 aus Quarzglas, in dem eine ionisierbare Füllung, die korrosiv wirkende Metallhalogenide umfaßt, gasdicht eingeschlossen ist. Innerhalb des Entladungsgefäßes 9 sind zwei Elektroden 22, 23 angeordnet, die jeweils über eine in der Quetschdichtung des Entladungsgefäßes 9 eingebettete Molybdänfolie 24, 25 mit je einer aus dem Entladungsgefäß 9 herausragenden Stromzuführung 26, 27 elektrisch leitend verbunden sind. Das Entladungsgefäß 9 ist, in geringem Abstand, vollständig von einem einseitig gequetschten, gasdicht verschlossenen Hüllkolben 28 umgeben. Der Hüllkolben 28 besteht aus Quarzglas, das mit ca. 0,5 Gewichtsprozent Cer dotiert ist. Innerhalb des Hüllkolbens 28 befindet sich Stickstoffgas, das bei Raumtemperatur einen Kaltfülldruck zwischen 600 mbar bis 700 mbar aufweist. Die aus dem Entladungsgefäß herausragenden Stromzuführungen 26, 27 sind jeweils über eine im Quetschfuß des Hüllkolbens 28 eingebettete Molybdänfolie 29, 30 mit je einer aus dem Hüllkolben 28 herausgeführten Stromzuführung 11, 12 elektrisch leitend verbunden. Ein einseitig gequetschter und einseitig gesockelter Außenkolben 13 umschließt den Hüllkolben 28 gasdicht. Der Außenkolben 13 ist evakuiert und besteht ebenfalls aus einem mit ca. 0,5 Gewichtsprozent Cer dotierten Quarzglas. Die aus dem Hüllkolben 28 herausgeführten Stromzuführungen 11, 12 sind jeweils über eine in der Quetschdichtung des Außenkolbens 13 eingebetteten Molybdänfolie 14, 15 mit je einer aus dem Außenkolben 13 herausragenden Stromzuführung 16, 17 elektrisch leitend verbunden. Die aus dem Außenkolben 13 herausgeführten Stromzuführungen 16, 17 stehen mit den aus dem Sockel 18 herausragenden Kontaktstiften 19, 20 im elektrischen Kontakt. Die in diesem Ausführungsbeispiel verwendeten Molybdänfolien sind alle mit einer eutektischen Mo-Ru-Legierung beschichtet, deren Dicke 500 nm beträgt. Die Zusammensetzung ist: Molybdän 43 Gew.-%, Ruthenium 57 Gew.-% (bevorzugt mindestens 40%, vorteilhaft mehr als 50% Ruthenium). Die Stromzuführungen 26, 12 und 17 sind mit einer Mo-Ru-Legierung beschichtet.The exemplary embodiment of the invention depicted in FIG. 2 is a high-pressure discharge lamp which is capped on one side. This lamp has a quartz glass discharge vessel 9, which is crimped on one side and in which an ionizable filling comprising corrosive metal halides is enclosed in a gas-tight manner. Within the discharge vessel 9, two
Beim Ausführungsbeispiel der Figur 3 handelt es sich um eine Halogenglühlampe 35 (12V bei 100 W Leistung) mit einem Lampenkolben 36 aus Quarzglas, der mit Hilfe einer Quetschdichtung 37 gasdicht verschlossen ist. In der Quetschdichtung des Lampenkolbens sind zwei Molybdänfolien 38 eingebettet. Innerhalb des Lampenkolbens befindet sich ein doppelt gewendelter Leuchtkörper 39, dessen einfach gewendelte Enden als innere Stromzuführung 40 wirken. Die inneren Stromzuführungen sind jeweils mit einer der in der Quetschdichtung eingebetteten Molybdänfolie 38 verschweißt. Aus der Quetschdichtung 37 ragen zwei äußere Stromzuführungen 34 heraus, die mit jeweils einer der beiden Molybdänfolien verbunden sind. Die beiden in der Quetschdichtung eingebetteten Molybdänfolien sind einseitig auf der Seite, an der die Stromzuführung 40 befestigt ist, mit einer eutektischen Mo-Ru-Legierung 90 nm dick beschichtet.In the embodiment of Figure 3 is a halogen incandescent lamp 35 (12V at 100 W power) with a
Das Wendelende 40 besteht aus 15 µm dickem Wolframdraht, der einfach gewendelt ist. Sein Außendurchmesser ist 55 µm. Das Wendelende und die Folie sind durch einen Hartlötprozeß miteinander verbunden. Der besondere Vorteil liegt darin, daß bisher für das Widerstandsschweißen eine Pulverschicht (Molybdän mit grober Körnung) verwendet werden mußte, in die das Gewickel eingedrückt wurde. Bei, Stromdurchgang des Schweißvorgangs kam es zu mehreren Nebenschlüssen aufgrund der inhomogenen Pulverschicht. Dies führte zu hohem Ausschuß und begrenzte die Untergrenze des Außendurchmesser der einfach gewendelten Stromzuführung auf etwa 80 µm, während erfindungsgemäß auch noch entsprechende Außendurchmesser zwischen 20 und 60 µm verarbeitbar sind. Dagegen benetzt jetzt die Rutheniumschicht, die als Lot wirkt, gleichmäßig die Folie und das aufgebrachte Einfach-Gewendel. Es gibt keine Nebenschlüsse, weshalb diese Methode es gestattet, deutlich kleinere Stromzuführungen, die insbesondere Wendelenden sein können, mit einer Folie zu verbinden.The
Auch extrem feine (lediglich 10 bis 100 µm dicke) Stromzuführungen lassen sich auf ähnliche Weise schonend mit der Folie zuverlässig verbinden. Insbesondere zeigt sich somit eine besondere Eignung der Ruthenium-beschichteten Folien für Niedervoltlampen mit hoher Leistung (20 W bis 150 W), aber auch ein Einsatz bei Hochvoltlampen ist empfehlenswert. Der Fertigungsprozeß wird erheblich vereinfacht, da zwei Montageschritte entfallen können, hinzu kommen die um bis zu 70 % niedrigeren Herstellkosten. Eine besondere Eignung ist für Halogenlampen für die Allgemeinbeleuchtung und Automobilbeleuchtung festzustellen.Even extremely fine (only 10 to 100 microns thick) power supply can be connected in a similar manner gently with the film reliably. In particular, thus shows a particular suitability of ruthenium-coated films for low-voltage lamps with high power (20 W to 150 W), but also a use in high-voltage lamps is recommended. The manufacturing process is considerably simplified, since two assembly steps can be omitted, in addition to the up to 70% lower production costs. A particular suitability is for halogen lamps for general lighting and automotive lighting.
Die Rutheniumbeschichtung ermöglicht also eine verbesserte Verbindungstechnik zwischen Folie und Stromzuführung, wobei dieses Prinzip .sowohl für die innere als auch die äußere Stromzuführung gilt. im allgemeinen sind jedoch die inneren Stromzuführungen kritischer. Daher kann die Rutheniumbeschichtung einseitig auf der Folie nur in der Nähe der Kontaktfläche der Stromzuführung aufgebracht sein.The ruthenium coating thus allows an improved connection between film and power supply, this principle applies both to the inner and the outer power supply. in general, however, the internal power supplies are more critical. Therefore, the ruthenium coating can be applied on one side of the film only in the vicinity of the contact surface of the power supply.
Claims (13)
- Fusible sealing foil (5) for lamp construction, comprising a metallic base body made from molybdenum, either pure or doped, and a coating applied to at least part of the base body, characterized in that the coating (6) contains ruthenium.
- Foil according to Claim 1, characterized in that the coating consists of pure ruthenium or a ruthenium compound or ruthenium alloy, in particular a eutectic molybdenum-ruthenium alloy.
- Foil according to Claim 1, characterized in that the layer thickness of the coating is between 0.02 and 1.0 µm, in particular 0.02 to 0.09 µm.
- Lamp having a fusible sealing foil according to Claims 1 to 3.
- Lamp, comprising a lamp vessel (1) made from hard glass or quartz glass, which at least at one end is provided with a sealing means (3) and contains a luminous means and if appropriate a fill, the sealing means being provided with at least one molybdenum foil (5) which is fused in the hard glass or quartz glass as part of a gastight leadthrough (3, 5, 8), the leadthrough comprising an inner supply conductor, characterized in that the molybdenum foil (5) is at least partially provided with a ruthenium-containing layer (6).
- Lamp according to Claim 5, characterized in that the sealing means is designed either as a pinch seal or as a fused seal.
- Lamp according to Claim 5, characterized in that the outer supply conductors are coated with the same or similar ruthenium-containing coating materials as the foil.
- Lamp according to Claim 5, characterized in that the inner supply conductor is not coiled and has a diameter of from 10 to 250 µm, in particular 10 to 50 µm.
- Lamp according to Claim 5, characterized in that the inner supply conductor is coiled once and has an external diameter of 20 to 150 µm, in particular 20 to 80 µm.
- Process for producing an electrically conducting connection between a molybdenum foil and a metal wire, in particular with a diameter between 10 and 250 µm, characterized in that the foil is equipped with a ruthenium-containing coating in the region of its contact surface with the wire.
- Process according to Claim 10, characterized in that the wire is made from tungsten.
- Process according to Claim 10, characterized in that the metal wire is coiled once and therefore forms a wound structure.
- Process according to Claim 12, characterized in that the external diameter of the wound structure is between 20 and 80 µm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19961551 | 1999-12-20 | ||
| DE19961551A DE19961551A1 (en) | 1999-12-20 | 1999-12-20 | Melting film and associated lamp with this film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1111655A1 EP1111655A1 (en) | 2001-06-27 |
| EP1111655B1 true EP1111655B1 (en) | 2006-12-13 |
Family
ID=7933476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00122550A Expired - Lifetime EP1111655B1 (en) | 1999-12-20 | 2000-10-16 | Seal foil an lamp provided with such a foil |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US6624576B1 (en) |
| EP (1) | EP1111655B1 (en) |
| JP (1) | JP4982708B2 (en) |
| CN (1) | CN1210748C (en) |
| AT (1) | ATE348400T1 (en) |
| DE (2) | DE19961551A1 (en) |
| HU (1) | HU225336B1 (en) |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030020846A (en) | 2001-09-04 | 2003-03-10 | 마쯔시다덴기산교 가부시키가이샤 | High pressure discharge lamp and method for producing the same |
| CN1643647A (en) * | 2002-03-18 | 2005-07-20 | 皇家飞利浦电子股份有限公司 | Lamp and method for producing a lamp |
| DE10218412A1 (en) | 2002-04-24 | 2003-11-06 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Melting film and associated lamp with this film |
| DE10245922A1 (en) * | 2002-10-02 | 2004-04-15 | Philips Intellectual Property & Standards Gmbh | High-pressure gas discharge lamp |
| WO2004049390A2 (en) * | 2002-11-25 | 2004-06-10 | Philips Intellectual Property & Standards Gmbh | Ceramic disharge vessel with an end part tightening coating layer |
| DE102004002455A1 (en) | 2003-03-14 | 2004-09-23 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Lamp e.g. high pressure discharge lamp, construction assembly for photo-optical purpose, has molybdenum film provided with coating in region of contact face, where film is welded to component in region of face to supporting roll |
| DE10312748A1 (en) * | 2003-03-21 | 2004-09-30 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | discharge lamp |
| DE10336087A1 (en) * | 2003-08-06 | 2005-03-03 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electrode system with novel connection, associated lamp with this foil and method of making the connection |
| US20060108928A1 (en) * | 2004-11-24 | 2006-05-25 | Patent-Treuhand-Gesellschaft Fur Elektrisch Gluhlampen Mbh | Process for producing a supply conductor for a lamp, and supply conductor for a lamp, as well as lamp having a supply conductor |
| US20070035252A1 (en) * | 2005-08-10 | 2007-02-15 | Jurgen Becker | Current bushing system for a lamp |
| US20070046168A1 (en) * | 2005-08-25 | 2007-03-01 | Jurgen Becker | Current-conducting system for a lamp |
| US8183780B2 (en) * | 2006-12-07 | 2012-05-22 | Osram Ag | Discharge lamp and method for producing a bulb neck for a discharge lamp |
| JP4724193B2 (en) * | 2007-07-17 | 2011-07-13 | パナソニック株式会社 | High pressure discharge lamp, lamp unit using the same, and projection type image display device using the lamp unit |
| DE102007055171A1 (en) | 2007-11-19 | 2009-05-20 | Osram Gesellschaft mit beschränkter Haftung | Molybdenum foil manufacturing method for use in current supply device for electrical lamp, involves coating surface of molybdenum foil with ruthenium containing material before blasting, where coating is performed using sputtering technique |
| DE102008037319A1 (en) | 2008-08-11 | 2010-02-18 | Osram Gesellschaft mit beschränkter Haftung | Film for lamps and electric lamp with such a film and associated manufacturing method |
| WO2013063092A1 (en) | 2011-10-24 | 2013-05-02 | Federal-Mogul Ignition Company | Spark plug electrode and spark plug manufacturing method |
| US9463977B2 (en) * | 2012-07-31 | 2016-10-11 | Raytheon Company | Sacrificial limiter filter |
| US9130358B2 (en) | 2013-03-13 | 2015-09-08 | Federal-Mogul Ignition Company | Method of manufacturing spark plug electrode material |
| WO2014149677A1 (en) * | 2013-03-15 | 2014-09-25 | Applied Materials, Inc. | Simplified lamp design |
| JP2016206484A (en) * | 2015-04-24 | 2016-12-08 | 株式会社リコー | Heater, fixing device, and image forming apparatus |
| CN111033385B (en) * | 2017-08-23 | 2022-09-13 | 凤凰电机公司 | Light source device, exposure device, and method for determining light source device |
| CN109487198B (en) * | 2018-12-20 | 2024-01-30 | 西安赛尔电子材料科技有限公司 | Preparation method of rare earth metal-molybdenum binary infiltration layer for kovar alloy surface |
| CN113199168A (en) * | 2021-04-01 | 2021-08-03 | 有研工程技术研究院有限公司 | Molybdenum-ruthenium alloy foil for high-temperature welding and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5524233B2 (en) * | 1972-07-01 | 1980-06-27 | ||
| JPS4935181A (en) * | 1972-08-07 | 1974-04-01 | ||
| NL183794B (en) * | 1979-02-26 | Philips Nv | HIGH PRESSURE MERCURY DISCHARGE LAMP. | |
| US4324588A (en) * | 1979-08-17 | 1982-04-13 | Engelhard Corporation | Arc erosion resistant composite materials and processes for their manufacture |
| JPS57143243A (en) * | 1981-02-28 | 1982-09-04 | Iwasaki Electric Co Ltd | Production of luminous tube for metallic vapor discharge lamp |
| US4835439A (en) * | 1987-09-29 | 1989-05-30 | General Electric Company | Increasing the oxidation resistance of molybdenum and its use for lamp seals |
| DE9013735U1 (en) * | 1990-10-02 | 1992-02-06 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München | High pressure discharge lamp |
| DE4031116A1 (en) * | 1990-10-02 | 1992-04-09 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | High pressure discharge lamp and method for producing the lamp |
| US5021711A (en) * | 1990-10-29 | 1991-06-04 | Gte Products Corporation | Quartz lamp envelope with molybdenum foil having oxidation-resistant surface formed by ion implantation |
| JPH0654657B2 (en) * | 1990-12-25 | 1994-07-20 | ウシオ電機株式会社 | Foil seal lamp and manufacturing method thereof |
| JP3097135B2 (en) * | 1991-02-05 | 2000-10-10 | 東芝ライテック株式会社 | light bulb |
| WO1999045570A1 (en) * | 1998-03-05 | 1999-09-10 | Ushio Denki Kabushiki Kaisya | Electricity lead-in body for bulb and method for manufacturing the same |
| EP1042785B1 (en) * | 1998-08-13 | 2005-10-05 | Koninklijke Philips Electronics N.V. | Electric lamp having a coated external current conductor |
-
1999
- 1999-12-20 DE DE19961551A patent/DE19961551A1/en not_active Withdrawn
-
2000
- 2000-10-16 DE DE50013857T patent/DE50013857D1/en not_active Expired - Lifetime
- 2000-10-16 AT AT00122550T patent/ATE348400T1/en not_active IP Right Cessation
- 2000-10-16 EP EP00122550A patent/EP1111655B1/en not_active Expired - Lifetime
- 2000-11-02 US US09/705,026 patent/US6624576B1/en not_active Expired - Lifetime
- 2000-12-18 HU HU0004971A patent/HU225336B1/en not_active IP Right Cessation
- 2000-12-18 JP JP2000384315A patent/JP4982708B2/en not_active Expired - Fee Related
- 2000-12-20 CN CN00135499.XA patent/CN1210748C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1301032A (en) | 2001-06-27 |
| EP1111655A1 (en) | 2001-06-27 |
| HUP0004971A2 (en) | 2002-01-28 |
| DE19961551A1 (en) | 2001-06-21 |
| ATE348400T1 (en) | 2007-01-15 |
| US6624576B1 (en) | 2003-09-23 |
| JP4982708B2 (en) | 2012-07-25 |
| DE50013857D1 (en) | 2007-01-25 |
| HU225336B1 (en) | 2006-09-28 |
| CN1210748C (en) | 2005-07-13 |
| JP2001216937A (en) | 2001-08-10 |
| HUP0004971A3 (en) | 2002-12-28 |
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