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EP0440620B2 - 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 - Google Patents
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EP0440620B2 - 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 - Google Patents

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 Download PDF

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Publication number
EP0440620B2
EP0440620B2 EP89903734A EP89903734A EP0440620B2 EP 0440620 B2 EP0440620 B2 EP 0440620B2 EP 89903734 A EP89903734 A EP 89903734A EP 89903734 A EP89903734 A EP 89903734A EP 0440620 B2 EP0440620 B2 EP 0440620B2
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EP
European Patent Office
Prior art keywords
component
oxide
weight
semi
finished product
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EP89903734A
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German (de)
English (en)
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EP0440620B1 (fr
EP0440620A1 (fr
Inventor
Ursula Mayer
Roland Michal
Karl E. Saeger
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Doduco Solutions GmbH
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Doduco GmbH and Co
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Application filed by Doduco GmbH and Co filed Critical Doduco GmbH and Co
Priority to AT89903734T priority Critical patent/ATE102387T1/de
Publication of EP0440620A1 publication Critical patent/EP0440620A1/fr
Publication of EP0440620B1 publication Critical patent/EP0440620B1/fr
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    • 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
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/12—Metallic powder containing non-metallic particles
    • 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
    • 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
    • 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
    • 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
    • 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
    • Y10T428/12021—All metal or with adjacent metals having metal particles having composition or density gradient or differential porosity
    • 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.]
    • 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
    • Y10T428/1216—Continuous interengaged phases of plural metals, or oriented fiber containing
    • 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
    • Y10T428/1216—Continuous interengaged phases of plural metals, or oriented fiber containing
    • Y10T428/12167—Nonmetal containing

Definitions

  • the invention relates to a semi-finished product for electrical Contacts made of a composite material based on silver-tin oxide and a powder metallurgical Process for its manufacture.
  • the invention is based on an entanglement with those specified in the preamble of claim 1 Characteristics or of a semi-finished product with the specified in the preamble of claim 12 Characteristics.
  • Contact pieces formed from such materials can contact pieces made of silver-cadmium oxide in service life under AC3 and AC4 test conditions (specified in IEC standard 158-1) be, however, show a stronger contact warming in the switchgear. what the lifespan of the Switchgear can impair. Moreover can the internally oxidized contact pieces subsequently no longer be deformed.
  • DE-B-26 59 012 is a powder metallurgy Process for the production of a contact material made of silver with two different ones Metal oxides known in which two silver-metal oxide composite powders mixed, pressed and sintered, one of which is Compound powder just one metal oxide and that other composite powder only the other metal oxide contains.
  • the object of the present invention is to achieve this based on a semi-finished product for electrical contacts to provide the base silver-tin oxide which is despite a very small content Tin oxide particles work well by extrusion and rolling can be processed and at the same time regarding Lifetime, tendency to weld and contact heating is as good or better than semi-finished products are based on silver-cadmium oxide.
  • the semifinished product produced according to the invention consists of a composite material, which is through a special rough structure in combination with a special fine structure.
  • the Coarse structure is given by the fact that in the composite material oxide rich areas where everything Metal oxide or the vast majority of Metal oxide component is concentrated, alternate with low-oxide areas. the only a small one Contain or even share of the metal oxide component are oxide free. Contain the low-oxide areas at most a small amount of metal oxide finely distributed in one from the material of the first component formed matrix.
  • the oxide rich areas contain the lion's share of the metal oxide component (in a concentration that is far greater is higher than the usual average metal oxide concentration in a contact material based on silver-tin oxide) and the rest of the material of the first component like a penetration or a storage composite finely divided into one another. These areas have emerged from low-oxide and high-oxide powders, which were mixed, pressed and, if necessary, sintered. The size of the low and high oxide areas, which is the rough structure of the composite determine therefore depends on the size of the powder particles from.
  • the fine structure of the composite is given by a finely dispersed oxide distribution in the oxide-rich forming the rough structure Areas of the composite, if necessary also in low-oxide areas, so far are present in these metal oxides.
  • the majority of the metal oxide component must come concentrated in the composite powder and be involved. Only the relatively small one Metal oxide content, which may still be in the contain low-oxide areas of the composite material can be e.g. in the form of a pure Oxide powder with the powder from the first component of the material are mixed. Doing so it prefers that in the low-oxide areas the same oxides are present as in the oxide-rich ones Areas.
  • any metal carbides still present especially tungsten carbide and / or molybdenum carbide
  • those not solved in the first component Metals can separate the powder mixture in the form Powders are added; they are suitable in switching operation the wetting of the tin oxide with To promote silver and thereby the contact resistance to humiliate.
  • the resulting Solid particles react with the oxygen in the oxidizing atmosphere in the flame or in the reactor at a temperature below that Melting temperature of the dissolved metals, whereby Powder particles arise in which the metals of the first component, i.e. the silver or the silver alloy, and the metal oxide component, so essentially tin oxide, in a very fine distribution tied together.
  • the metal oxide particles mostly in sizes between 0.1 ⁇ m and 1 ⁇ m (diameter) before what for the inventive method is advantageous.
  • spray pyrolysis Compound powder is also advantageous because by spray pyrolysis, in particular powder particles arise that are spherical or potato-shaped Have shape, the emergence of a deformable Semi-finished products favored because the spherical or potato-shaped particles of a plastic Deformation of the contact material less oppose as irregularly jagged powder particles.
  • oxidic and carbidic components sometimes lower the contact point temperature in switching operation and partly an extension of the life of the contact pieces not only with small and medium current loads, but also in the heavy load area.
  • Molybdenum carbide and tungsten carbide already work in small amounts.
  • the additional carbides and Oxides should make up 6% by weight of the contact material not exceed so this does not gets too hard.
  • nickel can also be advantageous to the composite material, which is not in silver is soluble and either as a very fine powder that formed from silver or a silver alloy Powder is mixed or also as spray-pyrolysized silver-nickel powder is introduced.
  • a silver-tin oxide composite powder with 32% by weight of tin oxide is produced by spraying an aqueous solution of silver nitrate and tin-II-chloride in a reactor heated to approx. 950 ° C. with an oxygen-containing atmosphere, whereby a silver-tin oxide composite powder fails , in the powder particles of which the tin oxide is present in a very fine distribution. Then 75 parts by weight of a silver powder with a particle size smaller than 40 microns with 25 parts by weight of the silver-tin oxide, composite powder are dry mixed for one hour, then isostatically pressed to blocks of about 50 kg in weight and then at a temperature sintered at 830 ° C for 1.5 hours.
  • the block thus formed is placed in the recipient of an extrusion press and hot-extruded, reducing the cross-section to a strand with a cross-section of 10 x 75 mm 2 , at a temperature of approx. 850 ° C., and then hot-rolled plated with a 1.5 mm thick fine silver sheet , hot rolled down to its final thickness of 2mm and processed into contact wafers according to the usual methods.
  • the silver-tin oxide composite in the contact wafers has a tin oxide content of 8% by weight.
  • the second example is modified that the powder mixture still contains 0.5% by weight Tungsten oxide (particle size smaller than 10 ⁇ m) and 0.3 wt% tungsten carbide (particle size smaller than 2.5 ⁇ m) are added. Furthermore is operated as in the first example. The addition of tungsten oxide and tungsten carbide leads to one Lowering the contact point temperature and to an extended lifespan from the Semi-finished electrical contact pieces.
  • a silver-tin oxide-tungsten oxide composite powder with 20% by weight of tin oxide and 0.5% by weight of tungsten oxide is made by spraying an aqueous Solution of silver nitrate, tin-II-chloride and Tungsten ll chloride in a heated to approx. 950 ° C Reactor with an oxygen-containing atmosphere, being a silver-tin oxide-tungsten oxide composite powder precipitates, in the powder particles of the tin oxide and the tungsten oxide is in a very fine distribution. Then 50 parts by weight of a Silver powder with a particle size smaller than 40 ⁇ m with 50 parts by weight of the silver-tin oxide-tungsten oxide composite powder dry for an hour mixed and as in the 1st example for contact plates processed further.
  • a silver-tin oxide composite powder with 30 % By weight of tin oxide is produced as in the second example.
  • a silver-nickel composite powder with 2 wt .-% Nickel is made by spraying one aqueous solution of silver nitrate and nickel-II-chloride in a reactor heated to approx. 950 ° C with a protective gas atmosphere (e.g. argon), whereby a silver-nickel composite powder fails, in the Powder particles the nickel in a very fine distribution is present.
  • a protective gas atmosphere e.g. argon
  • the fourth example can be modified accordingly be that instead of a silver-nickel composite powder a silver powder and a carbonyl nickel powder mixed with the silver-tin oxide composite powder will. Otherwise the same as in the 4th example method.
  • the attached figure shows schematically the Structure of one according to the second example manufactured composite, in which silver-tin oxide areas 1, mostly less than 50 ⁇ m, are in a silver matrix that consists of the oxide-free silver powder particles has emerged.
  • Semi-finished products produced according to the invention are suitable are particularly suitable for contact pieces in low-voltage switching devices, e.g. in motor contactors.

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  • 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)
  • Contacts (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)
  • Manufacture Of Switches (AREA)

Abstract

Le produit semi-fini décrit comporte une microstructure dans laquelle des régions contenant peu ou pas d'oxyde métallique alternent avec des régions dans lesquelles la totalité ou la majeure partie du constituant oxyde métallique est finement répartie. Est également décrit un procédé de métallurgie des poudres pour fabriquer ledit produit.

Claims (28)

  1. Procédé métallurgique de fabrication d'un semi-produit à base de poudre d'argent et d'oxyde d'étain pour contacts électriques, le produit composite comprenant 60 à 95 % en poids d'un premier composant à haute conductivité électrique composé soit d'argent, soit d'un alliage comprenant principalement de l'argent,
    le reste comprenant un deuxième composant non soluble dans le premier réduisant la tendance au soudage et à l'usure des contacts par combustion, ledit deuxième composant comprenant, par rapport au poids total de la matière composite, 3 à 25 % en poids d'oxyde d'étain, 0 à 10 % en poids d'un ou de plusieurs autres oxydes métalliques, ledit deuxième composant étant désigné ci-dessous, avec l'oxyde d'étain, par composant d'oxyde métallique,
    0 à 10 % en poids d'un ou de plusieurs carbures métalliques et 0 à 10 % en poids d'un ou de plusieurs métaux complémentaires, non solubles dans le premier composant,
    l'oxyde d'étain étant prédominant dans le deuxième composant et le composant d'oxyde métallique ne dépassant pas un pourcentage moyen de 25 % en poids de la matière composite,
    le procédé selon la présente invention consistant en le mélange d'une poudre composite, obtenue par pulvérisation d'une solution de sels des métaux du premier composant et d'un sel d'étain dans une atmosphère chaude, oxydante, dans laquelle lesdits sels sont décomposés pyrolytiquement, et comprenant moins de la moitié du premier composant et 60 à 100 % du composant d'oxyde métallique, par rapport au poids total de la matière composite,
    une ou plusieurs poudres comprenant le reste du premier composant et du deuxième composant ; et
    en une compression du mélange de poudres pour constituer des corps moulés en matière composite.
  2. Procédé selon la revendication 1, caractérisé en ce que les corps moulés sont frittés ultérieurement.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les corps moulés sont transformés, ultérieurement, par estampage, par extrusion ou par extrusion et laminage.
  4. Procédé selon la revendication 1, caractérisé en ce que la totalité du composant d'oxyde métallique est incorporée à la poudre composite.
  5. Procédé selon la revendication 4, caractérisé en ce que la totalité du deuxième composant est incorporée à la poudre composite.
  6. Procédé selon la revendication 1 ou 4, caractérisé en ce que les autres oxydes métalliques sous forme de poudre sont mélangés avec la poudre du premier composant et avec la poudre composite du deuxième composant.
  7. Procédé selon la revendication 1 ou 4, caractérisé en ce que les carbures métalliques sous forme de poudre sont mélangés à la poudre du premier composant et à la poudre composite du deuxième composant.
  8. Procédé selon la revendication 1 ou 4, caractérisé en ce que les autres métaux du deuxième composant sont mélangés, sous forme de poudre, à la poudre du premier composant et à la poudre composite du deuxième composant.
  9. Procédé selon la revendication 1, caractérisé en ce que la solution comprend également des sels d'autres métaux oxydables.
  10. Procédé selon la revendication 9, caractérisé en ce que la solution comprend des sels de tous les métaux oxydables prévus pour le deuxième composant.
  11. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la part de la poudre composite dans le mélange de poudre est au maximum de 45 % en volume.
  12. Semi-produit obtenu par mise en oeuvre du procédé selon la revendication 1, à base d'argent et d'oxyde d'étain pour contacts électriques fabriqué en un produit composite, comprenant entre 60 et 95 % en poids d'un premier composant à haute conductivité électrique, constitué soit d'argent, soit d'un alliage comprenant principalement de l'argent, et 25 à 40 % en poids d'un deuxième composant incorporé au premier composant mais non soluble dans ce dernier et réduisant la tendance au soudage et à l'usure par combustion, ledit deuxième composant comprenant, par rapport au poids de la matière composite, 3 à 25 % en poids d'oxyde d'étain, 0 à 10 % en poids d'un ou de plusieurs autres oxydes métalliques, désignés ci-dessous, avec l'oxyde d'étain, par composant d'oxyde métallique, 0 à 10 % en poids d'un ou de plusieurs carbures métalliques et 0 à 10 % en poids d'un ou de plusieurs métaux complémentaires non solubles dans le premier composant,
       l'oxyde d'étain étant prédominant dans le deuxième composant et le composant d'oxyde métallique ne dépassant pas une teneur moyenne de 25 % en poids de la matière composite,
       caractérisé en ce que des zones pauvres en oxyde, ayant une teneur moyennne de 0 à 20 % du composant d'oxyde métallique finement divisé dans une matrice constituée du matériau du premier composant, varient avec des zones riches en oxyde comprenant à 1,5 à 6 fois la teneur moyenne du composant d'oxyde métallique réparti sur l'ensemble du semi-produit et sur le reste du premier composant,
       les zones pauvres en oxyde et les zones riches en oxyde étant divisées, de manière statistiquement régulière, dans la matière composite, les zones pauvres en oxyde entourant, dans la plupart des cas, des zones riches en oxyde.
  13. Semi-produit selon la revendication 12, caractérisé en ce que les zones pauvres en oxyde constituent au moins 40 % en volume, de la matière composite et en ce que les zones riches en oxyde constituent le reste.
  14. Semi-produit selon la revendication 13, caractérisé en ce que les zones pauvres en oxyde constituent au moins 55 % vol. de la matière composite.
  15. Semi-produit selon l'une quelconque des revendications 12 à 14, caractérisé en ce que la composition du composant d'oxyde métallique est la même dans les zones pauvres en oxyde que dans les zones riches en oxyde.
  16. Semi-produit selon l'une quelconque des revendications 12 à 14, caractérisé en ce que la totalité du composant d'oxyde métallique est concentrée dans les zones riches en oxyde.
  17. Semi-produit selon la revendication 16 , caractérisé en ce que la totalité du deuxième composant est concentrée dans les zones riches en oxyde.
  18. Semi-produit selon l'une quelconque des revendications 12 à 17, caractérisé en ce que les zones riches en oxyde sont inférieures a 500 x 10-6 mm3.
  19. Semi-produit selon la revendication 18, caractérisé en ce que les zones riches en oxyde sont inférieures à 35 x 10-6 mm3.
  20. Semi-produit selon l'une quelconque des revendications 12 à 19 , caractérisé en ce que le premier composant est de l'argent pur.
  21. Semi-produit selon l'une quelconque des revendications 12 à 19, caractérisé en ce que le premier composant est un alliage d'argent, comprenant 0,1 à 10 % en poids de cuivre.
  22. Semi-produit selon l'une quelconque des revendications 12 à 19 , caractérisé en ce que le premier composant est un alliage d'argent, comprenant 0,1 à 10 % en poids de palladium.
  23. Semi-produit selon l'une quelconque des revendications 12 à 22, caractérisé en ce que le deuxième composant comprend 0,1 à 10 % en poids, par rapport à la masse de la matière composite globale, d'un métal ayant un point de fusion élevé .
  24. Semi-produit selon la revendication 23 , caractérisé en ce que le métal ayant un point de fusion élevé est le tungstène ou le molybdène.
  25. Semi-produit selon l'une quelconque des revendications 12 à 24, caractérisé en ce que les oxydes métalliques complémentaires du deuxième composant sont choisis parmi l'oxyde de tungstène, l'oxyde de molybdène, l'oxyde de vanadium, l'oxyde de bismuth, le titanate de bismuth et l'oxyde de cuivre.
  26. Semi-produit selon l'une quelconque des revendications 12 à 25, caractérisé en ce que le carbure métallique du deuxième composant est soit le carbure de tungstène, soit le carbure de molybdène.
  27. Semi-produit selon l'une quelconque des revendications 12 à 26, caractérisé en ce que la matière composite comprend jusqu'à 10 % en poids de nickel.
  28. Semi-produit selon la revendication 27, caractérisé en ce que la matière composite comprend moins de 1 % en poids de nickel.
EP89903734A 1988-03-26 1989-03-22 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 Expired - Lifetime EP0440620B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89903734T ATE102387T1 (de) 1988-03-26 1989-03-22 Halbzeug fuer elektrische kontakte aus einem verbundwerkstoff auf silber-zinnoxid-basis und pulvermetallurgisches verfahren zu seiner herstellung.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3810311 1988-03-26
DE3810311 1988-03-26
PCT/EP1989/000316 WO1989009478A1 (fr) 1988-03-26 1989-03-22 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

Publications (3)

Publication Number Publication Date
EP0440620A1 EP0440620A1 (fr) 1991-08-14
EP0440620B1 EP0440620B1 (fr) 1994-03-02
EP0440620B2 true EP0440620B2 (fr) 1998-06-03

Family

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EP89903734A Expired - Lifetime EP0440620B2 (fr) 1988-03-26 1989-03-22 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

Country Status (9)

Country Link
US (1) US5360673A (fr)
EP (1) EP0440620B2 (fr)
JP (1) JPH03504615A (fr)
CN (1) CN1022934C (fr)
CA (1) CA1339713C (fr)
DD (1) DD283571A5 (fr)
DE (2) DE58907140D1 (fr)
ES (1) ES2012293A6 (fr)
WO (1) WO1989009478A1 (fr)

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DE4220925C2 (de) * 1992-06-25 1996-05-02 Siemens Ag Verfahren zur Herstellung von mit elektrischen Kontakten versehenen Formkörpern aus hochtemperatur-supraleitendem Material (HTSL) und nach diesem Verfahren hergestellter Formkörper
ATE139864T1 (de) * 1992-09-16 1996-07-15 Duerrwaechter E Dr Doduco Werkstoff für elektrische kontakte auf der basis von silber-zinnoxid oder silber-zinkoxid und verfahren zu seiner herstellung
US5608766A (en) * 1993-10-29 1997-03-04 General Electric Company Co-deposition of palladium during oxide film growth in high-temperature water to mitigate stress corrosion cracking
US5846288A (en) * 1995-11-27 1998-12-08 Chemet Corporation Electrically conductive material and method for making
FR2916082B1 (fr) * 2007-05-11 2009-06-12 Schneider Electric Ind Sas Procede de fabrication d'un materiau pour pastille de contact electrique, pastille de contact realise par un tel procede
CN100552845C (zh) * 2007-09-27 2009-10-21 天津大学 银基氧化锡梯度电触头材料及制备方法
US8968608B2 (en) * 2008-01-17 2015-03-03 Nichia Corporation Method for producing conductive material, conductive material obtained by the method, electronic device containing the conductive material, light-emitting device, and method for producing light-emitting device
DE102008056264A1 (de) * 2008-11-06 2010-05-27 Ami Doduco Gmbh Verfahren zur Herstellung eines Halbzeugs und Halbzeug für elektrische Kontakte sowie Kontaktstück
DE102008056263A1 (de) * 2008-11-06 2010-05-27 Ami Doduco Gmbh Verfahren zur Herstellung eines Halbzeugs und Halbzeug für elektrische Kontakte sowie Kontaktstück
CN102074278B (zh) * 2010-12-09 2011-12-28 温州宏丰电工合金股份有限公司 颗粒定向排列增强银基电触头材料的制备方法
CN102142325B (zh) * 2010-12-30 2013-04-03 温州宏丰电工合金股份有限公司 颗粒定向排列增强银基氧化物电触头材料及其制备方法
CN105374598A (zh) * 2015-11-05 2016-03-02 福达合金材料股份有限公司 一种粗氧化物颗粒银基电接触材料的制备方法
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
CN106350692B (zh) * 2016-09-23 2018-04-03 佛山市诺普材料科技有限公司 一种利用银镍合金废料制备银氧化镍的方法
JP7084730B2 (ja) * 2017-02-01 2022-06-15 Ｄｏｗａエレクトロニクス株式会社 銀合金粉末およびその製造方法
CN111961910B (zh) * 2020-07-24 2022-07-12 浙江耐迩合金科技有限公司 一种银氧化锡电接触材料的制备方法
CN111961911B (zh) * 2020-07-24 2022-04-26 浙江耐迩合金科技有限公司 高抗熔焊性能银基电接触材料的制备方法
EP4563547A1 (fr) 2023-11-29 2025-06-04 Any Color International Limited. Matériau émettant dans l'infrarouge lointain et son procédé de préparation

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Also Published As

Publication number Publication date
ES2012293A6 (es) 1990-03-01
CA1339713C (fr) 1998-03-17
CN1036991A (zh) 1989-11-08
EP0440620B1 (fr) 1994-03-02
EP0440620A1 (fr) 1991-08-14
DE3909384A1 (de) 1989-10-19
JPH03504615A (ja) 1991-10-09
DE58907140D1 (de) 1994-04-07
US5360673A (en) 1994-11-01
WO1989009478A1 (fr) 1989-10-05
DD283571A5 (de) 1990-10-17
CN1022934C (zh) 1993-12-01

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