GB1243410A - Crystalline materials - Google Patents
Crystalline materialsInfo
- Publication number
- GB1243410A GB1243410A GB3859569A GB3859569A GB1243410A GB 1243410 A GB1243410 A GB 1243410A GB 3859569 A GB3859569 A GB 3859569A GB 3859569 A GB3859569 A GB 3859569A GB 1243410 A GB1243410 A GB 1243410A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transition temperature
- tungsten
- heated
- vanadium
- resistor
- 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
Links
- 239000002178 crystalline material Substances 0.000 title 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 6
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 abstract 6
- 239000000463 material Substances 0.000 abstract 5
- 230000007704 transition Effects 0.000 abstract 4
- 229910052742 iron Inorganic materials 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 3
- 229910052721 tungsten Inorganic materials 0.000 abstract 3
- 239000010937 tungsten Substances 0.000 abstract 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 229910021542 Vanadium(IV) oxide Inorganic materials 0.000 abstract 1
- 239000002775 capsule Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 238000010348 incorporation Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 229910052720 vanadium Inorganic materials 0.000 abstract 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 abstract 1
- GRUMUEUJTSXQOI-UHFFFAOYSA-N vanadium dioxide Chemical compound O=[V]=O GRUMUEUJTSXQOI-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/04—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient
- H01C7/041—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material having negative temperature coefficient formed as one or more layers or coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances oxides
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conductive Materials (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
Abstract
1,243,410. Vanadium pentoxide. SIEMENS A.G. 1 Aug., 1969 [13 Aug., 1968], No. 38595/69. Heading C1A. [Also in Division H1] The transition temperature at which the resistivity of vanadium dioxide exhibits a sudden change is shifted by the substitutional incorporation of both iron and tungsten, preferably in 1:1 atomic ratio. Both iron and tungsten may each be present in amounts up to 5 at. per cent of vanadium. The transition temperature of the composition may be as low as 0‹ C. To prepare the composition, vanadium pentoxide is first heated in hydrogen at 550‹ C. and is then heated at 1000‹ C. for 6 hours, to convert it to dioxide containing some trivalent metal. Vanadium pentoxide, iron III oxide and tungsten VI oxide are mixed in and the mixture is sealed in an evacuated capsule and heated at 1000‹ C. for 6 days. It is stated that any oxides of the metallic components may be used in this method to obtain the same product. A resistor is described in which a needle-like crystal of the resistance material is mounted on an insulating substrate and provided with electrodes. If a resistor made from the materials is fed from a constant current source its temperature is stabilized at the transition temperature (it operates with a low impedance channel within surrounding high resistance material) and the resistor may be used to thermostat other components. A superlattice structure is shown by these materials on one side of the transition temperature but not on the other. The material may be piezo-resistive (see Specification 1,239,333).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681765941 DE1765941C3 (en) | 1968-08-13 | Material for an electrical component with negative temperature characteristics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1243410A true GB1243410A (en) | 1971-08-18 |
Family
ID=5698697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3859569A Expired GB1243410A (en) | 1968-08-13 | 1969-08-01 | Crystalline materials |
Country Status (6)
| Country | Link |
|---|---|
| AT (1) | AT297853B (en) |
| CH (1) | CH498474A (en) |
| FR (1) | FR2015572A1 (en) |
| GB (1) | GB1243410A (en) |
| NL (1) | NL6911781A (en) |
| SE (1) | SE359677B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4763099A (en) * | 1985-12-04 | 1988-08-09 | Thorn Emi Plc | Temperature sensitive device |
| RU2162057C2 (en) * | 1994-11-09 | 2001-01-20 | Ле Пантюр Жефко | Vanadium dioxide microparticles, method of preparation thereof, more particularly surface coatings |
| US8102799B2 (en) | 2006-10-16 | 2012-01-24 | Assa Abloy Hospitality, Inc. | Centralized wireless network for multi-room large properties |
| US10001791B2 (en) | 2012-07-27 | 2018-06-19 | Assa Abloy Ab | Setback controls based on out-of-room presence information obtained from mobile devices |
| US10050948B2 (en) | 2012-07-27 | 2018-08-14 | Assa Abloy Ab | Presence-based credential updating |
-
1969
- 1969-08-01 GB GB3859569A patent/GB1243410A/en not_active Expired
- 1969-08-01 NL NL6911781A patent/NL6911781A/xx unknown
- 1969-08-08 FR FR6927370A patent/FR2015572A1/fr not_active Withdrawn
- 1969-08-11 AT AT773969A patent/AT297853B/en not_active IP Right Cessation
- 1969-08-11 CH CH1211369A patent/CH498474A/en not_active IP Right Cessation
- 1969-08-13 SE SE1127869A patent/SE359677B/xx unknown
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4763099A (en) * | 1985-12-04 | 1988-08-09 | Thorn Emi Plc | Temperature sensitive device |
| EP0228808A3 (en) * | 1985-12-04 | 1989-04-19 | Thorn Emi Plc | A temperature sensitive device |
| RU2162057C2 (en) * | 1994-11-09 | 2001-01-20 | Ле Пантюр Жефко | Vanadium dioxide microparticles, method of preparation thereof, more particularly surface coatings |
| US8102799B2 (en) | 2006-10-16 | 2012-01-24 | Assa Abloy Hospitality, Inc. | Centralized wireless network for multi-room large properties |
| US10001791B2 (en) | 2012-07-27 | 2018-06-19 | Assa Abloy Ab | Setback controls based on out-of-room presence information obtained from mobile devices |
| US10050948B2 (en) | 2012-07-27 | 2018-08-14 | Assa Abloy Ab | Presence-based credential updating |
| US10606290B2 (en) | 2012-07-27 | 2020-03-31 | Assa Abloy Ab | Controlling an operating condition of a thermostat |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6911781A (en) | 1970-02-17 |
| SE359677B (en) | 1973-09-03 |
| FR2015572A1 (en) | 1970-04-30 |
| DE1765941A1 (en) | 1971-10-28 |
| AT297853B (en) | 1972-04-10 |
| DE1765941B2 (en) | 1977-06-08 |
| CH498474A (en) | 1970-10-31 |
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