EP0056857A1 - Matériau pour contacts électriques - Google Patents

Matériau pour contacts électriques Download PDF

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Publication number
EP0056857A1
EP0056857A1 EP81110185A EP81110185A EP0056857A1 EP 0056857 A1 EP0056857 A1 EP 0056857A1 EP 81110185 A EP81110185 A EP 81110185A EP 81110185 A EP81110185 A EP 81110185A EP 0056857 A1 EP0056857 A1 EP 0056857A1
Authority
EP
European Patent Office
Prior art keywords
oxide
germanium
silver
sno
molybdenum
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.)
Granted
Application number
EP81110185A
Other languages
German (de)
English (en)
Other versions
EP0056857B1 (fr
Inventor
Wolfgang Dr. Böhm
Roger Wolmer
Willi Malikowski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Degussa GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6123147&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0056857(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Degussa GmbH filed Critical Degussa GmbH
Priority to AT81110185T priority Critical patent/ATE7979T1/de
Publication of EP0056857A1 publication Critical patent/EP0056857A1/fr
Application granted granted Critical
Publication of EP0056857B1 publication Critical patent/EP0056857B1/fr
Expired legal-status Critical Current

Links

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
    • H01H1/02376—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 containing as major component SnO2

Definitions

  • the invention relates to a material for electrical contacts made of silver, tin oxide and one or more other metal oxides.
  • silver-cadmium oxide has so far proven itself best for the multitude of applications. Due to the environmental impact of cadmium oxide (Cd0), however, efforts are being made to replace Cd0 with another metal oxide. These investigations showed that tin oxide (Sn0 2 ) is a suitable replacement for Cd0. Due to the higher thermal stability of SnO 2 compared to CdO, there is also a significantly reduced burn rate, which leads to a longer service life in the switchgear. A very important disadvantage of Ag / SnO 2 contacts, however, is that the transition resistance at the contact becomes too high after a few thousand circuits due to the formation of a covering layer. This then usually leads to increased temperatures (excess temperatures) in the switching device, which can lead to the destruction of the device and are therefore inadmissible.
  • the object of the invention was to provide a material for electrical contacts made of silver, tin oxide and one or more other metal oxides, which has a long service life, an even lower tendency to weld and even lower temperatures when switching compared to the known contact materials.
  • the material contains 0.05 to 4% by weight of molybdenum oxide and / or germanium oxide. It preferably contains 8 to 20% by weight of tin oxide, 0.05 to 4% by weight of molybdenum oxide and / or germanium oxide, the rest consists of silver.
  • molybdenum oxide and germanium oxide have proven to be preferred addition amounts. It is also possible to replace part of the molybdenum oxide and / or germanium oxide content with tungsten oxide without the improved properties being lost.
  • the materials based on AgSnO 2 with additions of molybdenum oxide and / or germanium oxide can be powder-metallurgically sintered both by pressing and sintering individual contact pieces and by extrusion Bolts are made.
  • Another special advantage of germanium oxide is that due to the solubility of germanium in silver, this additive can also be easily used for internally oxidized material. Experimental concentrations of 0.1% Ge to AgSn 7.5 resulted in a uniform excretion of the metal oxides in the material. There was no formation of a covering layer. Surprisingly, it was even found that germanium significantly accelerates the internal oxidation and that oxidation rates as with Ag / CdO can be achieved. In addition, the maximum internally oxidizable base content is increased by adding germanium and thus the security against welding is improved.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Contacts (AREA)
  • Conductive Materials (AREA)
  • Powder Metallurgy (AREA)
EP81110185A 1981-01-23 1981-12-05 Matériau pour contacts électriques Expired EP0056857B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81110185T ATE7979T1 (de) 1981-01-23 1981-12-05 Werkstoff fuer elektrische kontakte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3102067 1981-01-23
DE19813102067 DE3102067A1 (de) 1981-01-23 1981-01-23 Werkstoff fuer elektrische kontakte

Publications (2)

Publication Number Publication Date
EP0056857A1 true EP0056857A1 (fr) 1982-08-04
EP0056857B1 EP0056857B1 (fr) 1984-06-13

Family

ID=6123147

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81110185A Expired EP0056857B1 (fr) 1981-01-23 1981-12-05 Matériau pour contacts électriques

Country Status (19)

Country Link
US (1) US4410491A (fr)
EP (1) EP0056857B1 (fr)
JP (1) JPS57143460A (fr)
AR (1) AR227957A1 (fr)
AT (1) ATE7979T1 (fr)
AU (1) AU544021B2 (fr)
BR (1) BR8200159A (fr)
CA (1) CA1183373A (fr)
CS (1) CS231185B2 (fr)
DE (2) DE3102067A1 (fr)
DK (1) DK149786C (fr)
ES (1) ES8305528A1 (fr)
HU (1) HU186467B (fr)
MX (1) MX7462E (fr)
NO (1) NO157317C (fr)
PL (1) PL137714B1 (fr)
PT (1) PT74022B (fr)
YU (1) YU43508B (fr)
ZA (1) ZA82349B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0118717A1 (fr) * 1983-02-16 1984-09-19 Siemens Aktiengesellschaft Matériau fritté pour contacts électriques et procédé de sa fabrication
EP0152606A2 (fr) * 1984-01-30 1985-08-28 Siemens Aktiengesellschaft Matériau de contact et procédé de préparation de pièces de contact
DE3435289A1 (de) * 1984-09-26 1986-04-03 Wilo-Werk Gmbh & Co Pumpen- Und Apparatebau, 4600 Dortmund Anschlusskasten fuer pumpenmotor
EP0182386A2 (fr) * 1983-02-10 1986-05-28 Siemens Aktiengesellschaft Procédé de fabrication de pièces de contact
EP0318892A1 (fr) * 1987-12-02 1989-06-07 Advanced Metallurgy Inc. Matériau pour contact électrique constitué d'Ag, SnO2, GeO2 et In2O3
WO1993026021A1 (fr) * 1992-06-10 1993-12-23 Doduco Gmbh + Co. Matiere pour contacts electriques a base d'oxyde d'etain et d'argent ou d'oxyde de zinc et d'argent
WO1994007252A1 (fr) * 1992-09-16 1994-03-31 Doduco Gmbh + Co. Dr. Eugen Dürrwächter Materiau pour contacts electriques a base d'argent-oxyde stannique ou d'argent-oxyde de zinc et son procede de fabrication

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232627A1 (de) * 1981-09-24 1983-04-07 Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim Werkstoff fuer elektrische kontakte
US4904317A (en) * 1988-05-16 1990-02-27 Technitrol, Inc. Erosion resistant Ag-SnO2 electrical contact material
US5258052A (en) * 1992-06-18 1993-11-02 Advanced Metallurgy Incorporated Powder metallurgy silver-tin oxide electrical contact material
FR2893632B1 (fr) * 2005-11-18 2008-01-25 Commissariat Energie Atomique Revetement a base d'argent resistant a la sulfuration, procede de depot et utilisation
CN109252064B (zh) * 2018-10-15 2020-05-22 浙江工业大学 一种掺杂改性Ag/SnO2复合电接触材料及其制备方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933485A (en) * 1973-07-20 1976-01-20 Chugai Denki Kogyo Kabushiki-Kaisha Electrical contact material
US3933486A (en) * 1974-02-12 1976-01-20 Chugai Denki Kogyo Kabushiki-Kaisha Silver-metal oxide composite and method of manufacturing the same
JPS51121795A (en) * 1975-04-17 1976-10-25 Nippon Tungsten Co Ltd Ag-tin oxide-system electric contact material
JPS523193A (en) * 1975-06-24 1977-01-11 Sumitomo Electric Ind Ltd Electric contact material
US4141727A (en) * 1976-12-03 1979-02-27 Matsushita Electric Industrial Co., Ltd. Electrical contact material and method of making the same
DE2659012C3 (de) * 1976-12-27 1980-01-24 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zum Herstellen eines Sinterkontaktwerkstoffes aus Silber und eingelagerten Metalloxiden
DE2933338C3 (de) * 1979-08-17 1983-04-28 Degussa Ag, 6000 Frankfurt Werkstoff für elektrische Kontakte und Verfahren zu seiner Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Keine Entgegenhaltungen *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0182386A2 (fr) * 1983-02-10 1986-05-28 Siemens Aktiengesellschaft Procédé de fabrication de pièces de contact
EP0182386A3 (en) * 1983-02-10 1987-01-14 Siemens Aktiengesellschaft Berlin Und Munchen Contact material for low-tension switchgear and method of producing contact parts of this material
EP0118717A1 (fr) * 1983-02-16 1984-09-19 Siemens Aktiengesellschaft Matériau fritté pour contacts électriques et procédé de sa fabrication
EP0152606A2 (fr) * 1984-01-30 1985-08-28 Siemens Aktiengesellschaft Matériau de contact et procédé de préparation de pièces de contact
EP0152606A3 (en) * 1984-01-30 1985-09-25 Siemens Aktiengesellschaft Material for electric contacts and process for manufacturing contacts, and the manufactured contact part
DE3435289A1 (de) * 1984-09-26 1986-04-03 Wilo-Werk Gmbh & Co Pumpen- Und Apparatebau, 4600 Dortmund Anschlusskasten fuer pumpenmotor
EP0318892A1 (fr) * 1987-12-02 1989-06-07 Advanced Metallurgy Inc. Matériau pour contact électrique constitué d'Ag, SnO2, GeO2 et In2O3
WO1993026021A1 (fr) * 1992-06-10 1993-12-23 Doduco Gmbh + Co. Matiere pour contacts electriques a base d'oxyde d'etain et d'argent ou d'oxyde de zinc et d'argent
US5610347A (en) * 1992-06-10 1997-03-11 Doduco Gmbh & Co. Dr. Eugen Durrwachter Material for electric contacts taking silver-tin oxide or silver-zinc oxide as basis
WO1994007252A1 (fr) * 1992-09-16 1994-03-31 Doduco Gmbh + Co. Dr. Eugen Dürrwächter Materiau pour contacts electriques a base d'argent-oxyde stannique ou d'argent-oxyde de zinc et son procede de fabrication
US5822674A (en) * 1992-09-16 1998-10-13 Doduco Gmbh + Co. Dr. Eugen Durrwachter Electrical contact material and method of making the same

Also Published As

Publication number Publication date
CS842681A2 (en) 1984-02-13
US4410491A (en) 1983-10-18
YU302681A (en) 1983-12-31
DE3102067A1 (de) 1982-08-19
MX7462E (es) 1988-12-22
DE3164233D1 (en) 1984-07-19
DK21982A (da) 1982-07-24
ATE7979T1 (de) 1984-06-15
EP0056857B1 (fr) 1984-06-13
JPS57143460A (en) 1982-09-04
AR227957A1 (es) 1982-12-30
CA1183373A (fr) 1985-03-05
DK149786B (da) 1986-09-29
JPH0325493B2 (fr) 1991-04-08
AU544021B2 (en) 1985-05-16
BR8200159A (pt) 1982-11-03
CS231185B2 (en) 1984-10-15
ZA82349B (en) 1982-12-29
PL137714B1 (en) 1986-07-31
DK149786C (da) 1987-04-13
ES508715A0 (es) 1983-04-01
HU186467B (en) 1985-08-28
PL234697A1 (fr) 1982-10-25
NO157317B (no) 1987-11-16
AU7798681A (en) 1982-07-29
NO814101L (no) 1982-07-26
ES8305528A1 (es) 1983-04-01
YU43508B (en) 1989-08-31
PT74022A (de) 1981-12-01
PT74022B (de) 1983-04-29
NO157317C (no) 1988-02-24

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