DE1213777B - Process for the production of heat-resistant moldings - Google Patents
Process for the production of heat-resistant moldingsInfo
- Publication number
- DE1213777B DE1213777B DEU9807A DEU0009807A DE1213777B DE 1213777 B DE1213777 B DE 1213777B DE U9807 A DEU9807 A DE U9807A DE U0009807 A DEU0009807 A DE U0009807A DE 1213777 B DE1213777 B DE 1213777B
- Authority
- DE
- Germany
- Prior art keywords
- boron nitride
- percent
- weight
- fluoride
- calcium fluoride
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
- C04B35/645—Pressure sintering
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/5805—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides
- C04B35/58064—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides based on refractory borides
- C04B35/58071—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides based on refractory borides based on titanium borides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/583—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on boron nitride
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Ceramic Products (AREA)
Description
DEUTSCHESGERMAN
PATENTAMTPATENT OFFICE
Int. α.:Int. α .:
C04bC04b
Deutsche Kl.: 8Ob- 8/18 5German class: 8Ob- 8/18 5
Nummer: 1213 777Number: 1213 777
Aktenzeichen: 7 U 9807 VI b/80 b
Anmeldetag: 15. Mai 1963 .
Auslegetag: 31. März 1966File number: 7 U 9807 VI b / 80 b
Filing date: May 15, 1963.
Opening day: March 31, 1966
Es ist bekannt, hitzebeständige Formkörper durch Heißpressen von Gemischen aus Bornitrid und Titanborid herzustellen. Es ist ferner bekannt, Gemische aus Nitriden und Boriden mit Nickel als Zusatz heiß zupressen.It is known to produce heat-resistant molded bodies by hot pressing mixtures of boron nitride and titanium boride to manufacture. It is also known to hot mixtures of nitrides and borides with nickel as an additive to squeeze.
Es wurde gefunden, daß die Eigenschaften von , hitzebeständigen Fonnkörpern, die durch Heißpressen ; von Bornitrid oder von einem Gemisch aus Bornitrid mit bis zu 80 Gewichtsprozent Titanborid her- : gestellt werden, wesentlich verbessert werden können, ίο wenn man ein Ausgangsmaterial verwendet, das : 2 bis 10 Gewichtsprozent, bezogen auf das Bornitrid, j Calciumfluorid, Strontiumfluorid, Bariumfluorid, eines j Fluoride einer seltenen Erde, eines Chlorids eines I Erdalkalimetalls, eines Chlorids einer seltenen Erde <5 oder von Gemischen aus zwei oder mehreren dieser j Stoffe enthält. Besonders bewährt hat sich ein Aus- '·■ gangsmaterial, das aus einem Gemisch von Bornitrid j mit 2 bis 10 Gewichtsprozent Calciumfluorid besteht. [ Mit gutem Erfolge lassen sich als Ausgangsmaterial s|o auch Gemische aus 80 bis 20 Gewichtsprozent Bor- j nitrid mit 20 bis 80 Gewichtsprozent Titanborid, die ί zusätzlich 2 bis 7 Gewichtsprozent Calciumfluorid Ί enthalten, verwenden, <It has been found that the properties of heat-resistant molded bodies obtained by hot pressing; of boron nitride or a mixture of boron nitride with up to 80 percent by weight of titanium boride: can be significantly improved, ίο if a starting material is used that: 2 to 10 percent by weight, based on the boron nitride, j calcium fluoride, strontium fluoride, barium fluoride , a rare earth fluoride, an alkaline earth metal chloride, a rare earth chloride <5 or mixtures of two or more of these substances. Has proven particularly a training '* ■ starting material consisting of a mixture of boron nitride j of 2 to 10 weight percent of calcium fluoride. [With good results can be used as starting material s | o mixtures of 80 to 20 weight percent boron nitride j with 20 to 80 percent by weight titanium boride, the ί additionally contain 2 to 7 percent by weight of calcium fluoride Ί, use <
Als Ausgangsstoff kann man handelsübliches Bor- «5 nitrid verwenden, wenn es nicht vorher auf Tempera- ; türen oberhalb 1400° C behandelt worden ist. Das eine : längere Zeit diesen hohen Temperaturen ausgesetzte Bornitrid ist im allgemeinen zum Heißpressen nicht geeignet.Commercially available boron nitride can be used as the starting material if it has not been brought to temperature beforehand; doors above 1400 ° C has been treated. One : boron nitride exposed to these high temperatures for a long time is generally unsuitable for hot pressing.
Handelsübliches Bornitrid enthält in der Regel etwa 2 bis 13 Gewichtsprozent Verunreinigungen, vorzugsweise Sauerstoff in chemisch oder physikalisch gebundener Form. Beim Heißpressen in Gegenwart der erfindungsgemäßen Zusatzstoffe, z. B. Calciumfluorid, setzen sich diese mit den Verunreinigungen um, wobei zum Teil stabilere Verbindungen entstehen und ein Teil der Verunreinigungen als flüchtiges Nebenprodukt entweicht. Hierbei entwichen in Gasform auch gewisse Mengen von Bor- und Fluorverbindüngen. Commercially available boron nitride usually contains about 2 to 13 percent by weight impurities, preferably Oxygen in chemically or physically bound form. When hot pressing in the presence of the additives according to the invention, e.g. B. calcium fluoride, they react with the impurities, some of the compounds are more stable and some of the impurities are a volatile by-product escapes. Certain amounts of boron and fluorine compounds also escaped in gaseous form.
Zur Durchführung des erfindungsgemäßen Verfahrens mischt man Bornitrid oder Bornitrid und Titanborid mit der erforderlichen Menge der Zusatzstoffe, insbesondere Calciumfluorid.To carry out the process according to the invention, boron nitride or boron nitride and titanium boride are mixed with the required amount of additives, especially calcium fluoride.
Der Teilchendurchmesser des Gemisches soll vorteilhaft unter etwa 0,075 mm liegen. Das Gemisch
wird dann in eine Form gebracht und anschließend auf eine Temperatur zwischen 1600 und 21000C
erhitzt. Während der Erhitzung steht das Gemisch unter einem solchen Druck, daß eine maximale Dichte
erreicht wird. Der hierbei festgestellte Gewichtsverlust Verfahren zur Herstellung hitzebeständiger
FormkörperThe particle diameter of the mixture should advantageously be below about 0.075 mm. The mixture is then placed in a mold and then heated to a temperature between 1600 and 2100 ° C. During the heating, the mixture is under such a pressure that a maximum density is reached. The weight loss found in the process of making heat-resistant
Moldings
Anmelder:Applicant:
Union Carbide Corporation,Union Carbide Corporation,
New York, N. Y. (V. St A.)New York, N.Y. (V. St A.)
Vertreter:Representative:
Dipl.-Ing. H. Görth, Patentanwalt,Dipl.-Ing. H. Görth, patent attorney,
Frankfurt/M., Schneckenhofstr. 27Frankfurt / M., Schneckenhofstr. 27
Als Erfinder benannt:
Victor Mandorf jun., Fostoria, Ohio;
Ronald William Reidl,
Pittsburgh, Pa. (V. St. A.)Named as inventor:
Victor Mandorf Jr., Fostoria, Ohio;
Ronald William Reidl,
Pittsburgh, Pa. (V. St. A.)
Beanspruchte Priorität:Claimed priority:
V. St. v. Amerika vom 15. Mai 1962 (194 990)V. St. v. America May 15, 1962 (194 990)
zeigt, daß flüchtige Bestandteile und Umsetzungsprodukte entwichen sind. shows that volatile constituents and reaction products have escaped.
Erfindungsgemäß hergestellte Formkörper zeichnen sich durch eine hohe Temperaturfestigkeit, eine sehr geringe Aufnahme von Feuchtigkeit, einen sehr guten Widerstand gegen Verformung bei hoher Temperatur und einen Widerstand gegen thermische Brüche bei hohen Temperaturen aus. Sie sind ferner gekennzeichnet durch eine gute Benetzbarkeit durch geschmolzenes Aluminium, was für die Verwendung bei der Verdampfung von Aluminium von Bedeutung ist. Ein weiterer Vorteil der nach der Erfindung hergestellten Formkörper besteht darin, daß der spezifische Widerstand auch bei Erhöhung der Temperatur nicht ansteigt.Moldings produced according to the invention are characterized by a high temperature resistance, a very high one low absorption of moisture, very good resistance to deformation at high temperature and resistance to thermal breakage at high temperatures. They are also marked due to good wettability by molten aluminum, what for use is important in the evaporation of aluminum. Another advantage of the invention produced molded body consists in the fact that the specific resistance even with an increase in temperature does not increase.
Die nachstehende Tabelle zeigt die Eigenschaften einiger Formkörper aus Bornitrid, mit und ohne Zusatz von Calciumfluorid. Die Zahlenwerte zeigen die Überlegenheit von erfindungsgemäß hergestellten Formkörpern, gegenüber solchen, die in bekannter Weise ohne Zusatz von Calciumfluorid heißgepreßt sind.The table below shows the properties of some shaped bodies made of boron nitride, with and without Addition of calcium fluoride. The numerical values show the superiority of those produced according to the invention Moldings, compared to those which are hot-pressed in a known manner without the addition of calcium fluoride are.
609 540/390609 540/390
f 213 Τ77α f 213 Τ77 α
4-A4-A
+ 2% CaF2 BN J
+ 2% CaF 2
+ 10% CaF2 BN
+ 10% CaF 2
% Gewichtsverlust beim'Heißpressen ..] ..\.......
Biegefestigkeit senkrecht zurPreßrich'tuhg, kg/cm2...
bei 1000C .... .7.......... "... 9 / ο oxygen after hot pressing
% Weight loss during hot pressing ..] .. \ .......
Flexural strength perpendicular to the Preßrich'tuhg, kg / cm 2 ...
at 100 0 C .... .7 ... ....... "...
560
130
75
190
3,3 ^ W ■
560
130
75
190
3.3
1050
330
475
1,4750 !
1050
330
475
1.4
---%2,ιν :-
625
820
305
735
' "1,6 -- '* r r "i, 3f; -.
--- % 2, ι ν: -
625
820
305
735
' "1.6 -
495
430
200
430
-■■-- 3,0 '■■■ ι " Λ " -ΐ 4' ^
495
430
200
430
- ■■ - 3.0
Erhitzen auf 20000C, cm/cm ■ 10~3 Permanent deformation parallel to the direction of pressing
Heating to 2000 0 C, cm / cm ■ 10 ~ 3
Die folgende Tabelle zeigt die Eigenschaften einiger Formkörper aus Bornitrid und Titanborid mit und ohne Zusatz von Calciumfluorid. Die.Zahlenwerte zeigen die Überlegenheit von erfindungsgemäß hergestellten Fonnkörpern gegenüber solchen, die in bekannter Weise ohne Zusatz von Calciumfluorid heißgepreßt sindiThe following table shows the properties of some shaped bodies made of boron nitride and titanium boride with and without the addition of calcium fluoride. The numerical values show the superiority of those produced according to the invention Shaped bodies compared to those which are hot-pressed in a known manner without the addition of calcium fluoride
Zusammensetzungcomposition
•50% BN -50% TiB2 • 50% BN -50% TiB 2
50% BN 50% TiB2" .3% CaE2 50% BN 50% TiB 2 ". 3% CaE 2
% Sauerstoff nach Heißpressen % Oxygen after hot pressing
Biegefestigkeit senkrecht zur Preßrichtung, kg/cm2 Flexural strength perpendicular to the direction of pressing, kg / cm 2
bei 5000C at 500 0 C
bei HOO0C ....: at HOO 0 C ....:
bei 1800°C ., .-.-. '.at 1800 ° C.,.-.-. '.
Biegefestigkeit parallel zur Preßrichtung, kg/cm2 Flexural strength parallel to the direction of pressing, kg / cm 2
bei500°C at 500 ° C
bei 8000C at 800 ° C
bei HOO0C ■ ..- at HOO 0 C ■ ..-
bei 1800°C at 1800 ° C
Dauerverformung beim Erhitzen auf 18000C,
cm/cm · 10-3 Permanent deformation when heated to 1800 0 C,
cm / cm · 10- 3
parallel zur Preßrichtung parallel to the pressing direction
senkrecht zur Preßrichtung perpendicular to the pressing direction
Thermische' Beständigkeit bei 20stündigem Betrieb im Vakuum unter geschmolzenem Aluminium Thermal resistance when operated for 20 hours in Vacuum under molten aluminum
370 220 145370 220 145
515 315. 245 260515 315. 245 260
gesprungenjumped
nach 1I2 bisafter 1 I 2 to
3 Stunden 1,63 hours 1.6
1070
200
1551070
200
155
1190
300
215
2651190
300
215
265
6,06.0
2 O2 O
1,41.4
1065 215 2901065 215 290
855 .335 250 300855 .335 250 300
5,3 1,25.3 1.2
1,21.2
9.3Ö; 195' 2859.3Ö ; 195 '285
890 · 245 195! 275890 · 245 195! 275
4,5 0,94.5 0.9
Gleichförmige Erosion, kein ReißenUniform erosion, no cracking
Claims (3)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19499062A | 1962-05-15 | 1962-05-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1213777B true DE1213777B (en) | 1966-03-31 |
Family
ID=22719632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEU9807A Pending DE1213777B (en) | 1962-05-15 | 1963-05-15 | Process for the production of heat-resistant moldings |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1213777B (en) |
| GB (1) | GB978734A (en) |
| NL (1) | NL128338C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3047344A1 (en) * | 1979-12-21 | 1981-10-15 | Union Carbide Corp., 10017 New York, N.Y. | METHOD FOR PRODUCING FIRE-RESISTANT COMPOSITIONS SINKED TO HIGH DENSITY |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4514355A (en) * | 1982-12-22 | 1985-04-30 | Union Carbide Corporation | Process for improving the high temperature flexural strength of titanium diboride-boron nitride |
| US4746637A (en) * | 1984-11-08 | 1988-05-24 | Kabushiki Kaisha Toshiba | Aluminum nitride sintered body and process for producing the same |
| US4719187A (en) * | 1985-10-10 | 1988-01-12 | Corning Glass Works | Dense sintered bodies of nitride materials |
| US4843042A (en) * | 1986-06-30 | 1989-06-27 | General Electric Company | Alkaline earth fluoride additive for sintering aluminum nitride |
| JP2007506864A (en) | 2003-09-24 | 2007-03-22 | ゼネラル・エレクトリック・カンパニイ | Metal evaporation container and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE659917C (en) * | 1931-10-24 | 1938-05-13 | Fried Krupp Akt Ges | Sintered hard metal alloys |
| US2872327A (en) * | 1954-10-25 | 1959-02-03 | Carborundum Co | Refractory bodies containing boron nitride and a boride, and the manufacture thereof |
-
1963
- 1963-04-10 GB GB1425463A patent/GB978734A/en not_active Expired
- 1963-05-01 NL NL292180A patent/NL128338C/xx active
- 1963-05-15 DE DEU9807A patent/DE1213777B/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE659917C (en) * | 1931-10-24 | 1938-05-13 | Fried Krupp Akt Ges | Sintered hard metal alloys |
| US2872327A (en) * | 1954-10-25 | 1959-02-03 | Carborundum Co | Refractory bodies containing boron nitride and a boride, and the manufacture thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3047344A1 (en) * | 1979-12-21 | 1981-10-15 | Union Carbide Corp., 10017 New York, N.Y. | METHOD FOR PRODUCING FIRE-RESISTANT COMPOSITIONS SINKED TO HIGH DENSITY |
Also Published As
| Publication number | Publication date |
|---|---|
| GB978734A (en) | 1964-12-23 |
| NL128338C (en) | 1970-03-16 |
| NL292180A (en) | 1965-07-12 |
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