EP0725154B1 - Matière frittée pour contacts électriques à base d'oxyde d'étain et son procédé de fabrication - Google Patents

Matière frittée pour contacts électriques à base d'oxyde d'étain et son procédé de fabrication Download PDF

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Publication number
EP0725154B1
EP0725154B1 EP96100814A EP96100814A EP0725154B1 EP 0725154 B1 EP0725154 B1 EP 0725154B1 EP 96100814 A EP96100814 A EP 96100814A EP 96100814 A EP96100814 A EP 96100814A EP 0725154 B1 EP0725154 B1 EP 0725154B1
Authority
EP
European Patent Office
Prior art keywords
oxide
powder
silver
tin
bismuth
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
EP96100814A
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German (de)
English (en)
Other versions
EP0725154A1 (fr
Inventor
Wolfgang Dr. Weise
Roger Wolmer
Peter Dr. Braumann
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.)
Umicore AG and Co KG
Original Assignee
Degussa GmbH
Degussa Huels AG
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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Application filed by Degussa GmbH, Degussa Huels AG filed Critical Degussa GmbH
Publication of EP0725154A1 publication Critical patent/EP0725154A1/fr
Application granted granted Critical
Publication of EP0725154B1 publication Critical patent/EP0725154B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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

Definitions

  • the invention relates to a powder metallurgy produced sintered material based on silver-tin oxide with additions of indium oxide and bismuth oxide for electrical Contacts for switching nominal currents between 20 and 100 Amps and a process for their manufacture.
  • Silver / metal composite is the most common Silver / nickel used, the main area of application for lower currents. At high currents was until almost exclusively silver-cadmium oxide for some years used. However, due to environmental pollution tries to increase cadmium oxide through other oxides replace. In the meantime, tin oxide has been found in many Areas as an alternative to cadmium oxide.
  • the silver-tin oxide composite shows a significantly lower burn-up rate than silver-cadmium oxide, which leads to a longer service life in the switchgear.
  • the disadvantage of AgSn0 2 is that it tends to form a covering layer and thus to higher temperatures in the switchgear. With certain additives, such as WO 3 or MoO 3 , this problem could be dealt with. These materials have proven themselves extremely well in switching devices that have to withstand high thermal loads. With these additives, AgSnO 2 has proven itself particularly well in switchgear with nominal currents of more than 100 amps and under so-called AC4 load. With lower switching currents, however, the lifespan of these materials is relatively short.
  • the AgSnO 2 WO 3 / MoO 3 material is manufactured by powder metallurgy using extrusion technology.
  • the powder metallurgical production has the advantage that additives of any type and amount can be used. This allows the material to be specifically optimized for certain properties, such as welding force or heating.
  • the combination of powder metallurgy with extrusion technology allows a particularly high level of economy in the manufacture of the contact pieces.
  • An internally oxidized AgSnO 2 / In 2 O 3 material is also used.
  • This material described in DE-OS 24 28 147, contains 5-10% SnO 2 and 1-6% In 2 O 3 .
  • Internally oxidized materials have the disadvantage that the additives have to be selected with regard to the oxidation kinetics of the materials. A targeted change in the concentrations of the oxide additives to influence certain switching properties is often not possible due to the oxidation kinetics.
  • the AgSnO 2 In 2 O 3 has the disadvantage, however, that it leads to high excess temperatures when switching.
  • DE-OS 27 54 335 describes a contact material which contains 1.6 to 6.5 Bi 2 O 3 and 0.1 to 7.5 SnO 2 in addition to silver. This material can be produced both by internal oxidation and by powder metallurgy. Such high Bi 2 O 3 contents, however, lead to embrittlement, so that the material can only be produced by single sintering, but not by the more economical extrusion technology.
  • the powder metallurgical production of contact materials based on silver-tin oxide by mixing the powders, cold isostatic pressing, sintering and extrusion Semi-finished product is for example from DE-OS 43 19 137 and DE-OS 43 31 526 known.
  • Contact materials made of silver are known from US Pat. No. 4,141,727 known to contain bismuth tin oxide as a mixed oxide powder. Furthermore, the tin oxide powder is in DE-PS 29 52 128 before mixing with the silver powder at 900 to 1600 ° C annealed.
  • one sintered material produced by powder metallurgy on the Based on silver-tin oxide with additions of indium oxide and Bismuth oxide for electrical contacts to develop one the lowest possible tendency to weld and the lowest possible Overtemperature when switching nominal currents between 20 and 100 amps shows and with AC3 load in switchgear has a lifespan similar to that of silver-cadmium oxide.
  • This object is achieved in that he from 3.2 to 19.9% by weight of tin oxide, each 0.05 to 0.4% by weight Indium oxide and bismuth oxide, the rest is silver.
  • This material shows in the current range from 20 to 100 Ampere excellent life with overtemperature, which are clearly below 100 ° C.
  • tin oxide powder or the tin oxide powder together with the bismuth oxide powder Temperatures of 700 to 1400 ° C is annealed until more than 60% by weight of the tin oxide or the mixed oxide powder Have particle size of more than 1 micron.

Landscapes

  • 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)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Manufacture Of Switches (AREA)

Claims (5)

  1. Matière frittée, fabriquée selon la métallurgie des poudres, à base d'oxyde d'argent et d'étain avec des ajouts d'oxydes d'indium et de bismuth, pour des contacts électriques,
    caractérisée en ce que
    elle consiste en 3,2 à 19,9 % en poids d'oxyde d'étain, respectivement 0,05 à 0,4 % en poids d'oxyde d'indium et autant d'oxyde de bismuth et pour le reste de l'argent.
  2. Procédé de fabrication de matières frittées selon la revendication 1,
    consistant à mélanger les poudres, à faire subir au mélange des poudres un pressage isostatique à froid, à fritter à des températures allant de 500 à 940°C et à extruder la matière pour obtenir des fils ou des profilés,
    caractérisé en ce que
    plus de 60 % en poids de la poudre d'oxyde d'étain présente avant d'être mélangée à la poudre d'argent et aux autres poudres d'oxydes une taille de particules de plus de 1 µm.
  3. Procédé selon la revendication 2,
    caractérisé en ce qu'
    on transforme la poudre d'oxyde de bismuth avec la poudre d'oxyde d'étain thermiquement en une poudre mixte d'oxydes Bi2Sn2O7 qui présente pour plus de 60 % en poids une taille de particules de plus de 1 µm, et l'on mélange cette poudre mixte d'oxydes à la poudre d'argent et à la poudre d'oxyde d'indium.
  4. Procédé selon la revendication 2,
    caractérisé en ce qu'
    on porte à l'incandescence à des températures allant de 700 à 1400°C l'oxyde d'étain que l'on trouve habituellement dans le commerce, jusqu'à ce que plus de 60 % en poids de la poudre présente une taille de particules de plus de 1 µm.
  5. Procédé selon la revendication 3,
    caractérisé en ce que
    l'oxyde d'étain que l'on trouve habituellement dans le commerce, est porté à l'incandescence avec un oxyde de bismuth, que l'on trouve habituellement dans le commerce, à une température allant de 700 à 1400°C, jusqu'à ce que plus de 60 % de la poudre mixte d'oxydes présente une taille de particules de plus de 1 µm.
EP96100814A 1995-02-01 1996-01-20 Matière frittée pour contacts électriques à base d'oxyde d'étain et son procédé de fabrication Expired - Lifetime EP0725154B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19503182 1995-02-01
DE19503182A DE19503182C1 (de) 1995-02-01 1995-02-01 Sinterwerkstoff auf der Basis Silber-Zinnoxid für elektrische Kontakte und Verfahren zu dessen Herstellung

Publications (2)

Publication Number Publication Date
EP0725154A1 EP0725154A1 (fr) 1996-08-07
EP0725154B1 true EP0725154B1 (fr) 1999-12-22

Family

ID=7752863

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100814A Expired - Lifetime EP0725154B1 (fr) 1995-02-01 1996-01-20 Matière frittée pour contacts électriques à base d'oxyde d'étain et son procédé de fabrication

Country Status (11)

Country Link
US (1) US5798468A (fr)
EP (1) EP0725154B1 (fr)
JP (1) JPH08239723A (fr)
KR (1) KR960031028A (fr)
CN (1) CN1065002C (fr)
BR (1) BR9600289A (fr)
DE (2) DE19503182C1 (fr)
ES (1) ES2141979T3 (fr)
RU (1) RU2144093C1 (fr)
SG (1) SG70549A1 (fr)
TW (1) TW460595B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010014745A1 (de) * 2010-01-15 2011-07-21 Tyco Electronics AMP GmbH, 64625 Elektrisches Kontaktelement und Verfahren zur Herstellung eines elektrischen Kontaktelements

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10017282C2 (de) * 2000-04-06 2002-02-14 Omg Ag & Co Kg Verfahren zur Herstellung von Verbundpulver auf Basis Siler-Zinnoxid und deren Verwendung zur Herstellung von Kontaktwerkstoffen
JP4089252B2 (ja) * 2002-03-11 2008-05-28 オムロン株式会社 直流負荷用接点構成および該構成を有した開閉器
RU2219608C1 (ru) * 2002-11-04 2003-12-20 Овчинникова Марина Николаевна Проволока из серебросодержащего материала для изготовления электрических контактов
EP1505164B1 (fr) * 2003-08-08 2009-04-29 Mitsubishi Materials C.M.I. Corporation Procédé de fabrication d'un contact électrique à conductibilité électrique élevée pour un relais électromagnétique compact et contact électrique produit
EP1915765B1 (fr) * 2005-08-12 2010-08-04 Umicore AG & Co. KG Materiau a base de carbone-argent, et procede pour le produire
RU2346069C1 (ru) * 2007-06-15 2009-02-10 Федеральное государственное образовательное учреждение высшего профессионального образования "Сибирский федеральный университет" Способ получения серебряно-оловооксидного материала для электрических контактов
RU2367695C1 (ru) * 2008-06-16 2009-09-20 Федеральное государственное образовательное учреждение высшего профессионального образования "Сибирский федеральный университет" Металлооксидный материал для разрывных электроконтактов
CN106133845B (zh) 2014-04-02 2018-11-23 费罗公司 具有改善的玻璃强度性能的导电浆料
CN104439249A (zh) * 2014-12-30 2015-03-25 桂林电器科学研究院有限公司 一种片状银镍电触头材料的加工方法
US10290434B2 (en) 2016-09-23 2019-05-14 Honeywell International Inc. Silver metal oxide alloy and method of making
CN110468295B (zh) * 2019-08-05 2021-04-09 广东顺德银合精工五金有限公司 一种强界面结合型Ag/SnO2电接触材料的制备方法
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
CN114457253B (zh) * 2021-12-30 2022-12-09 无锡日月合金材料有限公司 一种用于微动开关的银镍-氧化铋材料及其制造方法
CN115491539B (zh) * 2022-08-30 2023-04-18 昆明理工大学 一种增强AgSnO2电接触材料及其制备方法

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US4141727A (en) * 1976-12-03 1979-02-27 Matsushita Electric Industrial Co., Ltd. Electrical contact material and method of making the same
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DE2952128C2 (de) * 1979-12-22 1984-10-11 Degussa Ag, 6000 Frankfurt Verfahren zur Vorbehandlung des Pulvers für gesintertes und stranggepreßtes Halbzeug aus Silber-Zinnoxid für elektrische Kontakte
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EP0152606B1 (fr) * 1984-01-30 1987-09-09 Siemens Aktiengesellschaft Matériau de contact et procédé de préparation de pièces de contact
DE3421759A1 (de) * 1984-06-12 1985-12-12 Siemens AG, 1000 Berlin und 8000 München Sinterkontaktwerkstoff fuer niederspannungsschaltgeraete der energietechnik
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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
EP0508055B1 (fr) * 1991-04-12 1997-05-02 Mitsubishi Materials Corporation Matériau pour contacts électriques formé d'oxides métalliques à base d'argent
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
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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010014745A1 (de) * 2010-01-15 2011-07-21 Tyco Electronics AMP GmbH, 64625 Elektrisches Kontaktelement und Verfahren zur Herstellung eines elektrischen Kontaktelements
DE102010014745B4 (de) * 2010-01-15 2011-09-22 Tyco Electronics Amp Gmbh Elektrisches Kontaktelement und Verfahren zur Herstellung eines elektrischen Kontaktelements

Also Published As

Publication number Publication date
CN1137068A (zh) 1996-12-04
BR9600289A (pt) 1997-12-23
CN1065002C (zh) 2001-04-25
DE19503182C1 (de) 1996-05-15
DE59603939D1 (de) 2000-01-27
TW460595B (en) 2001-10-21
SG70549A1 (en) 2000-02-22
KR960031028A (ko) 1996-09-17
US5798468A (en) 1998-08-25
ES2141979T3 (es) 2000-04-01
JPH08239723A (ja) 1996-09-17
RU2144093C1 (ru) 2000-01-10
EP0725154A1 (fr) 1996-08-07

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