EP0660964B2 - Materiau pour contacts electriques a base d'argent-oxyde stannique ou d'argent-oxyde de zinc et son procede de fabrication - Google Patents

Materiau pour contacts electriques a base d'argent-oxyde stannique ou d'argent-oxyde de zinc et son procede de fabrication Download PDF

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Publication number
EP0660964B2
EP0660964B2 EP93920746A EP93920746A EP0660964B2 EP 0660964 B2 EP0660964 B2 EP 0660964B2 EP 93920746 A EP93920746 A EP 93920746A EP 93920746 A EP93920746 A EP 93920746A EP 0660964 B2 EP0660964 B2 EP 0660964B2
Authority
EP
European Patent Office
Prior art keywords
tin oxide
silver
powder
mixture
weight
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 - Lifetime
Application number
EP93920746A
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German (de)
English (en)
Other versions
EP0660964A1 (fr
EP0660964B1 (fr
Inventor
Volker Behrens
Thomas Honig
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.)
Doduco Contacts and Refining GmbH
Original Assignee
AMI Doduco 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
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Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/05—Mixtures of metal powder with non-metallic powder
    • C22C1/059—Making alloys comprising less than 5% by weight of dispersed reinforcing phases
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12049—Nonmetal component
    • Y10T428/12056—Entirely inorganic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component
    • Y10T428/12097—Nonparticulate component encloses particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12063—Nonparticulate metal component
    • Y10T428/12104—Particles discontinuous
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12014—All metal or with adjacent metals having metal particles
    • Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
    • Y10T428/12146—Nonmetal particles in a component

Definitions

  • the invention is based on a material for electrical contacts based on silver-tin oxide with those specified in the preamble of claim 1 Features.
  • a material is from WO 80/01434 known; the material is obtained by mixing a powder of silver or one mainly Silver containing alloy with tin oxide powder, compacting of mixing and sintering.
  • Bismuth and germanium oxide are also additives have been mentioned (DE-A-31 02 067 and DE-A-32 32 627). These additives help to wet tin oxide particles, so that if the contact piece surface under the Effect of a switching arc melts locally, the Tin oxide remains in fine suspension. Besides this positive effect in terms of heating behavior under continuous current, however, these additives have also undesirable side effects.
  • Another disadvantage in particular of tungsten and molybdenum compounds in that they are particularly in switching mode AC1 load (DIN 57660 part 102) a material transfer favor the accelerated burnup and thus leads to a reduction in the service life.
  • a contact material with little tendency to weld and if possible low contact temperature under continuous current load be obtained by targeting one Fabricates in which areas where no or contains very little metal oxide with areas where all or the far predominant part of the metal oxide component in fine Distribution is included.
  • a composite powder which the predominant Part of the tin oxide and other oxides and / or carbides and part of the silver.
  • This composite powder is mixed with the rest of the silver powder and possibly with the smaller rest of the metal oxides mixed, compacted, sintered and formed. To this Way you get a usable material, however, after a relatively complex Method.
  • the oxides of tungsten are as metal oxides, Molybdenum, bismuth, vanadium and copper called.
  • the doped tin oxide powder is one Composite powder, which can be obtained by Mix the tin oxide powder with the powder Dopant, annealing the mixture so that the Dopant and the tin oxide powder particles diffuse, and separating the excess dopant of tin oxide powder.
  • To obtain doped tin oxide powder is in P 42 19 333.8 discloses a solution of a salt of tin and a salt of the metal or metals from which Oxides or carbides are the dopant in a hot, oxidizing atmosphere spray in which the salts are decomposed so that a fine-particle composite powder precipitates, its particles contains the tin oxide and the dopants.
  • the present invention is based on the object a material of the type mentioned at the beginning create the addition of an equally favorable heating behavior shows how the known contact materials, however, is more ductile and one in the AC1 switching case has a longer lifespan.
  • This task is solved by a material with the specified in claim 1 Features.
  • a particularly suitable process for the manufacture of such a material is the subject of claim 8.
  • Advantageous further developments the invention are the subject of the dependent claims.
  • the invention additionally uses a powder which contains one or more chemical compounds of silver, oxygen and a metal from subgroups II to VI and / or antimony, bismuth, germanium, gallium and indium, in particular silver-tungsten-oxygen compounds, silver-molybdenum-oxygen compounds, silver-antimony-oxygen compounds, silver-bismuth-oxygen compounds and silver-germanium-oxygen compounds.
  • this class of compounds also includes silver antimonate and silver molybdate, of which Christine Bourda (see above) is known to be in a silver-tin oxide-molybdenum oxide material or silver-tin oxide-antimony oxide material.
  • Another advantage of the invention is that due to the lower proportion of the chosen additive the service life of contact pieces made of the material is increased, especially under AC1-test conditions.
  • the use of the invention Powder surprisingly leads to one less erosion than with conventional silver-tin oxide contact materials with pure metal oxide additives such as tungsten oxide, molybdenum oxide or bismuth oxide.
  • the tin oxide particles are superficially with the silver-metal-oxygen compounds busy. They promote the wetting of the tin oxide particles with the arc forming melt phase then particularly effective.
  • a tin oxide powder modified in this way can be obtained with advantage by using tin oxide powder and the powdery additive together mixed and glows together so that the tin oxide powder particles be wetted by the additive, whereby a Part of the addition also in the surface area of the Diffuse tin oxide particles and possibly a mixed oxide can form.
  • the material expediently contains 5 to 20% by weight, preferably 8 to 14 %
  • the tin oxide powder preferably with at least 0.1% by weight of the additive, but with no more than 2.5% by weight, preferably with not more than 1% by weight of the additive.
  • Silver molybdate is particularly preferred as an additive because of its particularly beneficial effect on the Heating behavior.
  • the glow of the mixture of tin oxide and the selected addition is conveniently made at oxygen-containing atmosphere, preferably in air at a Temperature between 500 ° C and 800 ° C, best at a temperature just above the melting point of the additive so that it becomes liquid and the tin oxide particles are wetted superficially.
  • the addition is then only there where its wetting Effect is desired, and can therefore be economical be used. With the small amounts, in the tin oxide particles stick to not yet with each other; but should it be in individual cases can occur by grinding to encounter.
  • the tin oxide and the additive can not only connected by glowing together but also by separating the additive on the tin oxide particles using chemical or physical deposition processes.
  • the teaching according to the invention can be transferred are based on contact materials based on silver with zinc oxide. In such materials are so far in in practice, no additives are used, but one endeavors to take constructive measures in the shaft device to achieve a reduction in the contact point temperature.
  • an additive combined zinc oxide powder can a lowering of the contact point temperature also with this type of material to reach.
  • the three examples can be modified accordingly that zinc oxide is used instead of tin oxide becomes.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Composite Materials (AREA)
  • Dispersion Chemistry (AREA)
  • Contacts (AREA)
  • Powder Metallurgy (AREA)
  • Conductive Materials (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (13)

  1. Matériau pour contacts électriques à base d'argent et d'oxyde d'étain, que l'on obtient par
    mélange à une poudre d'oxyde d'étain, d'une poudre d'argent ou d'un alliage contenant essentiellement de l'argent,
    compression du mélange, et
    frittage,
    caractérisé en ce que, pour fabriquer le mélange, on utilise en outre une poudre qui contient de 0,01 à 10 % en poids, par rapport à la quantité de l'oxyde d'étain, d'un ou plusieurs composés constitués d'argent, d'oxygène et d'un métal des groupes secondaires II-VI du Tableau Périodique et/ou d'antimoine, de bismuth, de germanium, d'indium et de gallium, et en ce que les composés sont combinés à l'oxyde d'étain pour donner des particules composites d'une poudre composite.
  2. Matériau selon la revendication 1, caractérisé en ce qu'il contient de 5 à 20 % en poids d'oxyde d'étain.
  3. Matériau selon la revendication 2, caractérisé en ce qu'il contient de 8 à 14 % en poids d'oxyde d'étain.
  4. Matériau selon l'une des revendications précédentes, caractérisé en ce que l'additif est présent en une quantité d'au moins 0,1 % en poids.
  5. Matériau selon l'une des revendications précédentes, caractérisé en ce que l'additif est présent en une quantité non supérieure à 2,5 % en poids.
  6. Matériau selon la revendication 5, caractérisé en ce que l'additif est présent en une quantité non supérieure à 1 % en poids.
  7. Matériau selon l'une des revendications précédentes, caractérisé en ce que les composés contenus dans l'additif contiennent un métal du groupe du tungstène, du molybdène, du vanadium, de l'antimoine, du bismuth et du germanium, le molybdène étant particulièrement préféré.
  8. Procéde pour fabriquer un matériau pour contacts électriques à base d'argent et d'oxyde d'étain, que l'on obtient par mélange d'une poudre d'argent ou d'un alliage contenant essentiellement de l'argent à une poudre d'oxyde d'étain et à une poudre supplénemtaire contenant de 0,01 à 10 % en poids, par rapport à la quantité de l'oxyde d'étain, d'un ou plusieurs composés constitués d'argent, d'oxygène et d'un métal des groupes secondaires II - VI du Tableau Périodique et/ou d'antimoine, de bismuth, de germanium, d'indium et de gallium, compression du mélange et frittage selon l'une des revendications précédentes, caractérisé en ce que la poudre constituée essentiellement d'oxyde d'étain et de l'additif est obtenue par
    mélange de la poudre d'oxyde d'étain à l'additif sous forme de poudre, et
    recuit du mélange.
  9. Procédé selon la revendication 8, caractérisé en ce que le mélange est recuit à l'air.
  10. Procédé selon la revendication 8 ou 9, caractérisé en ce que le mélange est recuit entre 500 et 800°C.
  11. Procédé selon l'une des revendications 8 à 10, caractérisé en ce que le mélange est recuit à une température supérieure au point de fusion de l'additif.
  12. Procédé selon l'une des revendications 8 à 11, caractérisé en ce que le mattériau, après frittage, est soumis à une post-compression et/ou à une déformation.
  13. Matériau selon l'une des revendications 1 à 7, ou préparé selon l'une des revendications 8 à 12, caractérisé en ce que l'oxyde d'étain est remplacé par l'oxyde de zinc.
EP93920746A 1992-09-16 1993-09-16 Materiau pour contacts electriques a base d'argent-oxyde stannique ou d'argent-oxyde de zinc et son procede de fabrication Expired - Lifetime EP0660964B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4231022 1992-09-16
DE4231022 1992-09-16
PCT/EP1993/002511 WO1994007252A1 (fr) 1992-09-16 1993-09-16 Materiau pour contacts electriques a base d'argent-oxyde stannique ou d'argent-oxyde de zinc et son procede de fabrication

Publications (3)

Publication Number Publication Date
EP0660964A1 EP0660964A1 (fr) 1995-07-05
EP0660964B1 EP0660964B1 (fr) 1996-06-26
EP0660964B2 true EP0660964B2 (fr) 2003-01-08

Family

ID=6468120

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93920746A Expired - Lifetime EP0660964B2 (fr) 1992-09-16 1993-09-16 Materiau pour contacts electriques a base d'argent-oxyde stannique ou d'argent-oxyde de zinc et son procede de fabrication

Country Status (7)

Country Link
US (1) US5822674A (fr)
EP (1) EP0660964B2 (fr)
JP (1) JP3441074B2 (fr)
AT (1) ATE139864T1 (fr)
DE (2) DE4331526C3 (fr)
ES (1) ES2091633T5 (fr)
WO (1) WO1994007252A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19503182C1 (de) * 1995-02-01 1996-05-15 Degussa Sinterwerkstoff auf der Basis Silber-Zinnoxid für elektrische Kontakte und Verfahren zu dessen Herstellung
US5846288A (en) * 1995-11-27 1998-12-08 Chemet Corporation Electrically conductive material and method for making
EP2644723B1 (fr) 2012-03-26 2017-01-18 Umicore AG & Co. KG Matière active composite
CN104493175B (zh) * 2014-12-30 2016-04-13 桂林电器科学研究院有限公司 一种含添加物的银氧化锡电触头材料的制备方法
RU2579846C1 (ru) * 2015-03-11 2016-04-10 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Способ получения легированного оксидом висмута серебряно-оловооксидного материала для электроконтактов
DE102016105437A1 (de) 2016-03-23 2017-09-28 Doduco Gmbh Verfahren zur Herstellung eines Kontaktwerkstoffes auf Basis von Silber-Zinnoxid oder Silber-Sinkoxid sowie Kontaktwerkstoff
US10290434B2 (en) 2016-09-23 2019-05-14 Honeywell International Inc. Silver metal oxide alloy and method of making
CN115870498A (zh) * 2022-12-06 2023-03-31 浙江福达合金材料科技有限公司 一种提高片状银氧化锡电触头材料结合强度的制备方法

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CH588152A5 (fr) * 1972-12-11 1977-05-31 Siemens Ag
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
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DE3232627A1 (de) * 1981-09-24 1983-04-07 Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim Werkstoff fuer elektrische kontakte
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DE3426240A1 (de) * 1984-07-17 1986-01-30 Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim Verfahren zum herstellen eines bandfoermigen halbzeugs fuer elektrische kontakte aus einem verbundmaterial und vorrichtung zum durchfuehren des verfahrens
EP0440620B2 (fr) * 1988-03-26 1998-06-03 DODUCO GmbH Produit semi-fini pour contacts electriques, constitue d'un materiau composite a base d'argent et d'oxyde d'etain, et procede de metallurgie des poudres pour sa fabrication
DE58908359D1 (de) * 1988-11-17 1994-10-20 Siemens Ag Sinterkontaktwerkstoff für Niederspannungsschaltgeräte der Energietechnik, insbesondere für Motorschütze.
EP0435655B1 (fr) * 1989-12-26 1998-02-25 Sumitomo Metal Mining Company Limited Matériau composite d'argent et d'un oxyde métallique et son procédé de préparation
DE4319137A1 (de) * 1992-06-10 1993-12-16 Duerrwaechter E Dr Doduco Werkstoff für elektrische Kontakte auf der Basis von Silber-Zinnoxid oder Siler-Zinkoxid

Also Published As

Publication number Publication date
DE4331526A1 (de) 1994-03-17
DE4331526C3 (de) 2003-11-06
EP0660964A1 (fr) 1995-07-05
ES2091633T3 (es) 1996-11-01
DE59303090D1 (de) 1996-08-01
US5822674A (en) 1998-10-13
JPH08504292A (ja) 1996-05-07
ATE139864T1 (de) 1996-07-15
ES2091633T5 (es) 2003-09-01
EP0660964B1 (fr) 1996-06-26
JP3441074B2 (ja) 2003-08-25
WO1994007252A1 (fr) 1994-03-31
DE4331526C2 (de) 1998-07-30

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