EP0024349B1 - Matériau pour contacts électriques et procédé pour sa fabrication - Google Patents

Matériau pour contacts électriques et procédé pour sa fabrication Download PDF

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Publication number
EP0024349B1
EP0024349B1 EP80104820A EP80104820A EP0024349B1 EP 0024349 B1 EP0024349 B1 EP 0024349B1 EP 80104820 A EP80104820 A EP 80104820A EP 80104820 A EP80104820 A EP 80104820A EP 0024349 B1 EP0024349 B1 EP 0024349B1
Authority
EP
European Patent Office
Prior art keywords
oxide
silver
tin oxide
weight
cdo
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
Application number
EP80104820A
Other languages
German (de)
English (en)
Other versions
EP0024349A1 (fr
Inventor
Wolfgang Dr. Böhm
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=6078672&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0024349(B1) "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 AT80104820T priority Critical patent/ATE2032T1/de
Publication of EP0024349A1 publication Critical patent/EP0024349A1/fr
Application granted granted Critical
Publication of EP0024349B1 publication Critical patent/EP0024349B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps

Definitions

  • the invention relates to a material for electrical contacts made of silver, tin oxide and a further metal oxide and a method for its production.
  • DE-B-11 90 677 describes materials for electrical contacts which, in addition to silver, must also contain 0.8 to 6% silver halide and 1 to 4.5% oxide from the group of copper, chromium, tin, cadmium, Iron, ruthenium, nickel, manganese, molybdenum, cobalt, tungsten, uranium, rhodium and palladium can contain.
  • halide-containing contact materials have not proven themselves in practice.
  • the object of the invention was to provide a material for electrical contacts made of silver, tin oxide and a further metal oxide and a method for its production which has a long service life, a low tendency to weld and shows no elevated temperatures when switching.
  • the material contains 8-20 wt .-% tin oxide, 0.05-5 wt .-% tungsten oxide, the rest of silver.
  • This material surprisingly results in a large reduction in the excess temperature, so that the same, in some cases even lower, temperatures are found in the switching device than in Ag / CdO.
  • the welding forces of Ag / Sn0 2 can also be significantly reduced by the addition of tungsten oxide.
  • a material which consists of 10-15% by weight of tin oxide, 0.2-1.5% by weight of tungsten oxide and the rest of silver has proven particularly useful. Surprisingly, even very low tungsten oxide contents result in significant improvements in terms of overtemperature and welding force. Particularly good results are obtained if the Sn0 2 is introduced evenly without agglomerates, with a primary grain size of ⁇ 5 ⁇ m.
  • This fine distribution of the metal oxide components can be achieved by sieving the Sn0 2 before mixing, or particularly advantageously by mixing and kneading the silver, tin oxide and tungsten oxide powders in a moist state.
  • the wet sieving removes secondary agglomerates of Sn0 2 before mixing.
  • secondary agglomerates are destroyed by the high shear forces that occur, and this results in an even and fine-grained distribution of the component.
  • the following table illustrates the essential improvements in switching behavior that were achieved with the material according to the invention compared to Ag / CdO and Ag / Sn0 2 using examples.
  • a 3 TB 54 switching device from Siemens was used for this.
  • the materials according to the invention were produced by powder metallurgy after wet kneading with the following extrusion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Contacts (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Switches (AREA)

Claims (3)

1. Matériau pour contacts électriques en argent, oxyde d'étain et un autre oxyde métallique, caractérisé en ce qu'il contient 8 à 20 % en poids d'oxyde d'étain, 0,05 à 5% en poids d'oxyde de tungstène, le reste étant de l'argent.
2. Matériau selon la revendication 1, caractérisé en ce qu'il contient 10 à 15 % en poids d'oxyde de tungstène.
3. Procédé pour la fabrication de matériaux pour contacts électriques selon les revendications 1 et 2, par frittage d'un mélange pulvérulent des constituants, caractérisé en ce que le mélange de poudre est trituré, avant le frittage, à l'état humide.
EP80104820A 1979-08-17 1980-08-14 Matériau pour contacts électriques et procédé pour sa fabrication Expired EP0024349B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80104820T ATE2032T1 (de) 1979-08-17 1980-08-14 Werkstoff fuer elektrische kontakte und verfahren zu seiner herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2933338 1979-08-17
DE2933338A DE2933338C3 (de) 1979-08-17 1979-08-17 Werkstoff für elektrische Kontakte und Verfahren zu seiner Herstellung

Publications (2)

Publication Number Publication Date
EP0024349A1 EP0024349A1 (fr) 1981-03-04
EP0024349B1 true EP0024349B1 (fr) 1982-12-15

Family

ID=6078672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104820A Expired EP0024349B1 (fr) 1979-08-17 1980-08-14 Matériau pour contacts électriques et procédé pour sa fabrication

Country Status (14)

Country Link
US (1) US4330330A (fr)
EP (1) EP0024349B1 (fr)
JP (1) JPS5633444A (fr)
AR (1) AR220647A1 (fr)
AT (1) ATE2032T1 (fr)
AU (1) AU529960B2 (fr)
BR (1) BR8005126A (fr)
CA (1) CA1149645A (fr)
DE (2) DE2933338C3 (fr)
ES (1) ES494261A0 (fr)
IN (1) IN155263B (fr)
MX (1) MX7137E (fr)
YU (1) YU41511B (fr)
ZA (1) ZA805021B (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3017424A1 (de) * 1980-05-07 1981-11-12 Degussa Ag, 6000 Frankfurt Werkstoff fuer elektrische kontakte
DE3102067A1 (de) * 1981-01-23 1982-08-19 Degussa Ag, 6000 Frankfurt Werkstoff fuer elektrische kontakte
DE3232627A1 (de) * 1981-09-24 1983-04-07 Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim Werkstoff fuer elektrische kontakte
DE3146972A1 (de) * 1981-11-26 1983-06-01 Siemens AG, 1000 Berlin und 8000 München Verfahren zum herstellen von formteilen aus cadmiumfreien silber-metalloxid-verbundwerkstoffen fuer elektrische kontaktstuecke
US4452651A (en) * 1982-07-08 1984-06-05 Chugai Denki Kogyo K.K. Electrical contact materials and their production method
US4452652A (en) * 1982-07-08 1984-06-05 Akira Shibata Electrical contact materials and their production method
DE3466122D1 (en) * 1984-01-30 1987-10-15 Siemens Ag Contact material and production of electric contacts
DE3405218A1 (de) * 1984-02-14 1985-09-05 Siemens AG, 1000 Berlin und 8000 München Sinterkontaktwerkstoff und verfahren zu dessen herstellung
DE3541584A1 (de) * 1985-11-25 1987-05-27 Siemens Ag Verfahren und vorrichtung zum herstellen von metall-verbund-werkstoffen sowie damit hergestellte kontaktstuecke fuer elektrische schaltgeraete
JPH06104873B2 (ja) * 1986-07-08 1994-12-21 富士電機株式会社 銀―金属酸化物系接点用材料及びその製造方法
US4904317A (en) * 1988-05-16 1990-02-27 Technitrol, Inc. Erosion resistant Ag-SnO2 electrical contact material
EP0645049B1 (fr) * 1992-06-10 1996-04-03 DODUCO GMBH + Co Dr. Eugen DÀ¼rrwächter Matiere pour contacts electriques a base d'oxyde d'etain et d'argent ou d'oxyde de zinc et d'argent
US5258052A (en) * 1992-06-18 1993-11-02 Advanced Metallurgy Incorporated Powder metallurgy silver-tin oxide electrical contact material
US5822674A (en) * 1992-09-16 1998-10-13 Doduco Gmbh + Co. Dr. Eugen Durrwachter Electrical contact material and method of making the same
CN114334503B (zh) * 2021-12-24 2022-11-15 佛山市诺普材料科技有限公司 低温匀化制备银氧化锡电触头材料的方法及其材料

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486341A (en) * 1945-06-30 1949-10-25 Baker & Co Inc Electrical contact element containing tin oxide
DE807416C (de) * 1949-10-20 1951-06-28 Eugen Duerrwaechter Dr Ing Elektrischer Kontaktwerkstoff und Verfahren zu Seiner Herstellung
DE1190677B (de) * 1961-01-24 1965-04-08 Engelhard Ind Inc Verfahren zur Herstellung elektrischer Kontakte durch Sintern von Silberpulver unter Zusatz von Halogenen
US3205565A (en) 1963-01-21 1965-09-14 Clevite Corp Sintered rubbing contact material and method for producing same
DE1719444B2 (de) * 1967-10-13 1975-09-04 Veb Keramische Werke Hermsdorf, X 6530 Hermsdorf Verfahren zur Herstellung eines Dispersionskontaktwerkstoffes mit Silberoder Kupfer-Matrix
DE2306825B2 (de) * 1973-02-12 1977-08-11 National Research Institute For Metals, Tokio Elektrisches kontaktmaterial aus einer silber und mindestens ein metalloxid enthaltenden legierung
FR2236261A1 (en) * 1973-07-05 1975-01-31 Sumitomo Electric Industries Electrical contacts of silver- indium- and tin- oxides - made by internal oxidn. of silver-indium-tin alloys, and with excellent properties
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
US4141727A (en) 1976-12-03 1979-02-27 Matsushita Electric Industrial Co., Ltd. Electrical contact material and method of making the same

Also Published As

Publication number Publication date
AU529960B2 (en) 1983-06-30
DE3061351D1 (en) 1983-01-20
DE2933338B2 (de) 1981-06-04
CA1149645A (fr) 1983-07-12
DE2933338A1 (de) 1981-02-26
DE2933338C3 (de) 1983-04-28
MX7137E (es) 1987-08-10
AR220647A1 (es) 1980-11-14
YU41511B (en) 1987-08-31
US4330330A (en) 1982-05-18
ES8106560A1 (es) 1981-07-01
IN155263B (fr) 1985-01-12
BR8005126A (pt) 1981-02-24
ATE2032T1 (de) 1982-12-15
ES494261A0 (es) 1981-07-01
ZA805021B (en) 1981-08-26
YU199780A (en) 1983-04-30
EP0024349A1 (fr) 1981-03-04
JPH0141691B2 (fr) 1989-09-07
AU6090580A (en) 1981-02-19
JPS5633444A (en) 1981-04-03

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