GB1536847A - Electrically conductive composite materials - Google Patents
Electrically conductive composite materialsInfo
- Publication number
- GB1536847A GB1536847A GB3033875A GB3033875A GB1536847A GB 1536847 A GB1536847 A GB 1536847A GB 3033875 A GB3033875 A GB 3033875A GB 3033875 A GB3033875 A GB 3033875A GB 1536847 A GB1536847 A GB 1536847A
- Authority
- GB
- United Kingdom
- Prior art keywords
- powder
- heating
- silver
- oxidize
- mixture
- 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
- 239000002131 composite material Substances 0.000 title abstract 3
- 239000000843 powder Substances 0.000 abstract 7
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 abstract 4
- 238000010438 heat treatment Methods 0.000 abstract 4
- 239000000203 mixture Substances 0.000 abstract 4
- 239000011701 zinc Substances 0.000 abstract 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 3
- 229910045601 alloy Inorganic materials 0.000 abstract 3
- 239000000956 alloy Substances 0.000 abstract 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 2
- 229960004643 cupric oxide Drugs 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 2
- 239000001301 oxygen Substances 0.000 abstract 2
- 229910052760 oxygen Inorganic materials 0.000 abstract 2
- 229910052709 silver Inorganic materials 0.000 abstract 2
- 239000004332 silver Substances 0.000 abstract 2
- BSWGGJHLVUUXTL-UHFFFAOYSA-N silver zinc Chemical compound [Zn].[Ag] BSWGGJHLVUUXTL-UHFFFAOYSA-N 0.000 abstract 2
- 229910052725 zinc Inorganic materials 0.000 abstract 2
- 239000011787 zinc oxide Substances 0.000 abstract 2
- 239000005751 Copper oxide Substances 0.000 abstract 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract 1
- 229910001297 Zn alloy Inorganic materials 0.000 abstract 1
- 229910007565 Zn—Cu Inorganic materials 0.000 abstract 1
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 229910002091 carbon monoxide Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 229910000431 copper oxide Inorganic materials 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
- 230000003628 erosive effect Effects 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000003345 natural gas Substances 0.000 abstract 1
- 230000003647 oxidation Effects 0.000 abstract 1
- 238000007254 oxidation reaction Methods 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 239000001294 propane Substances 0.000 abstract 1
- 238000005245 sintering Methods 0.000 abstract 1
- 230000001988 toxicity Effects 0.000 abstract 1
- 231100000419 toxicity Toxicity 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0021—Matrix based on noble metals, Cu or alloys thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/021—Composite material
- H01H1/023—Composite material having a noble metal as the basic material
- H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
- H01H1/02372—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/048—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by powder-metallurgical processes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Contacts (AREA)
- Conductive Materials (AREA)
Abstract
1536847 Internally oxidized alloys SQUARE D CO 12 July 1976 [19 July 1975] 30338/75 Headings C7A and D An electrically conductive composite material sutitable for electrical contacts consists of a mixture of silver, not more than 16À07% zinc oxide with optionally up to 6À13% copper oxide. The method of producing the material involves mixing the zinc and silver powders, heating to form a silver-zinc alloy in powder form by diffusion, then heating the Ag-Zn powder in an oxidizing atmosphere at 180‹C to melting point to oxidize the Zn to ZnO, and compacting to the required shape prior to sintering and coining. Production of Ag-Zn-Cu composites involves the mixing of Zn powder with copper oxide powder to give a Zn-cupric oxide mix, mixing this powder with silver powder, heating the mixture in a reducing atmosphere of H, CO, cracked ammonia, burnt natural gas of propane or a CO-H 2 mixture at 200-700‹C to form a Ag-Zn-Cu alloy powder. The powdered alloy is then subjected to internal oxidation by heating in air or oxygen to oxidize the Zn and re-oxidize the Cu. The oxidized powder is then compacted (about 40 t.s.i.) and sintered preferably about 700‹C for 1-2 hours in air, oxygen or an inert gas prior to coining, to improve the density and to finally dimension the article, at about 60 t.s.i. The material so produced has comparable erosion resistance properties to the standard Ag-CdO composite materials but without their toxicity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3033875A GB1536847A (en) | 1976-07-12 | 1976-07-12 | Electrically conductive composite materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3033875A GB1536847A (en) | 1976-07-12 | 1976-07-12 | Electrically conductive composite materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1536847A true GB1536847A (en) | 1978-12-20 |
Family
ID=10306049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3033875A Expired GB1536847A (en) | 1976-07-12 | 1976-07-12 | Electrically conductive composite materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1536847A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997027601A3 (en) * | 1996-01-26 | 1997-10-09 | Siemens Ag | Method of producing a shaped part from a silver-based contact material |
-
1976
- 1976-07-12 GB GB3033875A patent/GB1536847A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997027601A3 (en) * | 1996-01-26 | 1997-10-09 | Siemens Ag | Method of producing a shaped part from a silver-based contact material |
| US6001149A (en) * | 1996-01-26 | 1999-12-14 | Siemens Aktiengesellschaft | Process for producing a shaped article from contact material based on silver, contact material and shaped article |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |