EP0118717B2 - Sinterverbundwerkstoff für elektrische Kontakte und Verfahren zu seiner Herstellung - Google Patents

Sinterverbundwerkstoff für elektrische Kontakte und Verfahren zu seiner Herstellung Download PDF

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Publication number
EP0118717B2
EP0118717B2 EP84101010A EP84101010A EP0118717B2 EP 0118717 B2 EP0118717 B2 EP 0118717B2 EP 84101010 A EP84101010 A EP 84101010A EP 84101010 A EP84101010 A EP 84101010A EP 0118717 B2 EP0118717 B2 EP 0118717B2
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EP
European Patent Office
Prior art keywords
oxide
silver
sintered material
moo3
mass content
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
EP84101010A
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German (de)
English (en)
French (fr)
Other versions
EP0118717B1 (de
EP0118717A1 (de
Inventor
Horst Prof. Dr. Schreiner
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.)
Siemens AG
Original Assignee
Siemens 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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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6190954&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0118717(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT84101010T priority Critical patent/ATE20506T1/de
Publication of EP0118717A1 publication Critical patent/EP0118717A1/de
Publication of EP0118717B1 publication Critical patent/EP0118717B1/de
Application granted granted Critical
Publication of EP0118717B2 publication Critical patent/EP0118717B2/de
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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
    • 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
    • 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
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/929—Electrical contact feature
    • 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
    • Y10T428/12174—Mo or W containing

Definitions

  • the invention relates to a sintered composite material for electrical contacts made of silver, tin oxide, bismuth oxide, copper oxide and a method for its manufacture.
  • AgCdO has proven itself very well for the production of electrical contact pieces for a large number of applications.
  • the CdO has been classified as a toxic material due to its environmental impact. An attempt is therefore made to replace CdO with another metal oxide.
  • tin oxide (SnO2) is a suitable replacement for cadmium oxide (CdO).
  • AgSnO2 contact materials do not yet have optimal values in all functionally important properties. So z. B. with AgSnO2 contact materials over AgCdO contact materials a firmly adhering oxide layer.
  • EP-A-0 024 349 discloses a material for electrical contacts made of silver, tin oxide and tungsten oxide as a further metal oxide.
  • DE-A-30 17 424 suggests that such a silver-based material with 5 to 20 wt.% Tin oxide and 0.05 to 5 wt.% Tungsten oxide additionally 0.1 to 5 wt.% Contains bismuth oxide. These materials are sintered and compacted from the powder mixture of silver and the individual metal oxides, so that a typical sintered structure with a statistical distribution of the metal oxides results.
  • a material for electrical contacts which consists of silver, tin oxide, bismuth oxide and copper oxide.
  • the copper oxide can optionally be replaced by zinc oxide. Both materials can be produced by the so-called internal oxidation of alloys initially produced, the oxidation taking place essentially by solid-state diffusion of oxygen.
  • a material which contains molybdenum oxide and / or germanium oxide in addition to silver and tin oxide, but no bismuth oxide and copper oxide, it being possible for the molybdenum oxide to be partially replaced by tungsten oxide.
  • This material is either powder metallurgically made from silver and the metal oxides or by internal oxidation of alloy sheets, whereby no statements have been made about the structure formation.
  • the invention has for its object to improve the known CdO-free silver contact pieces in such a way that the optimization of the contact properties with regard to arcing in the arc, low welding force and low contact resistance is made possible.
  • the invention thus provides a material in which the fact that tungsten and / or molybdenum is insoluble in silver is advantageously taken into account. By sublimating the corresponding oxides on the composite particles, the advantages of these metal oxide additives can nevertheless be exploited.
  • the mean particle sizes of the tin oxide, bismuth oxide and copper oxide precipitations in the silver regions are between 0.1 and 5 ⁇ m, in particular between 0.1 ⁇ m and 3 ⁇ m.
  • the tin oxide content is between 6 and 15% by mass
  • the bismuth oxide content is between 0.2 and 2% by weight
  • the copper oxide content is between 0.2 and 2% by weight
  • the proportion of subliming metal oxide additive is between 0.2 and 2% by weight .
  • a powder of particle size ⁇ 200 ⁇ m is produced from an AgSnBiCu alloy with 7.7% tin (Sn), 1% bismuth (Bi) and 1% copper (Cu).
  • a suitable procedure for this is e.g. B. the pressure atomization of the melt of this alloy.
  • the alloy powder obtained is completely internally oxidized, a composite powder of AgSnO2Bi2O3CuO having the appropriate composition being obtained.
  • the internal oxidation is carried out in air. wherein the annealing treatment is started at 500 ° C and is held at 800 ° C after one hour for the same time.
  • the composite powder is mixed with 0.8% by mass of tungsten oxide (WO3) in an agitator ball mill under acetone for one hour and thereby the WO3 is distributed on the surface of the composite powder particles.
  • WO3 tungsten oxide
  • a shaped body is produced by pressing, sintering and hot post-compression, the residual porosity of which is ⁇ 1.5%.
  • the contact properties such as arcing in the arc.
  • Welding force and contact resistance were measured under a condition described in the literature on a test switch and compared with a very good AgCdO quality.
  • the burn-up values are 25% lower, which leads to a corresponding improvement in the service life.
  • a corresponding saving in silver can be achieved by reducing the contact piece volume.
  • the welding force values were in the same range as for AgCdO 12 and the contact resistance was in the same fluctuation range.
  • Example 2 Made of an AgSnBiCu alloy with 7.7% tin (Sn) by mass, 1% by mass Bismuth (Bi) and 1% by mass of coupler (Cu), as in Example 1, is used to produce a powder with a particle size of ⁇ 200 ⁇ m by pressure atomization of the molten alloy.
  • a completely internally oxidized composite powder AgSnO2Bi2O3CuO is obtained under the conditions given in Example 1.
  • the composite powder is ground with 0.4% mass content of tungsten oxide powder (WO3) and 0.2% mass content of molybdenum oxide powder (MoO3) in an agitator ball mill under acetone for 1 h and the oxide additives are evenly distributed on the surface of the composite powder particles.
  • WO3 tungsten oxide powder
  • MoO3 molybdenum oxide powder

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)
  • Powder Metallurgy (AREA)
  • Manufacture Of Switches (AREA)
  • Conductive Materials (AREA)
EP84101010A 1983-02-16 1984-02-01 Sinterverbundwerkstoff für elektrische Kontakte und Verfahren zu seiner Herstellung Expired - Lifetime EP0118717B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84101010T ATE20506T1 (de) 1983-02-16 1984-02-01 Sinterverbundwerkstoff fuer elektrische kontakte und verfahren zu seiner herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3305270 1983-02-16
DE19833305270 DE3305270A1 (de) 1983-02-16 1983-02-16 Sinterverbundwerkstoff fuer elektrische kontakte und verfahren zu seiner herstellung

Publications (3)

Publication Number Publication Date
EP0118717A1 EP0118717A1 (de) 1984-09-19
EP0118717B1 EP0118717B1 (de) 1986-06-18
EP0118717B2 true EP0118717B2 (de) 1991-02-20

Family

ID=6190954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101010A Expired - Lifetime EP0118717B2 (de) 1983-02-16 1984-02-01 Sinterverbundwerkstoff für elektrische Kontakte und Verfahren zu seiner Herstellung

Country Status (5)

Country Link
US (1) US4551301A (ja)
EP (1) EP0118717B2 (ja)
JP (1) JPS59173910A (ja)
AT (1) ATE20506T1 (ja)
DE (2) DE3305270A1 (ja)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3304637A1 (de) * 1983-02-10 1984-08-16 Siemens AG, 1000 Berlin und 8000 München Sinterkontaktwerkstoff fuer niederspannungsschaltgeraete
DE3421758A1 (de) * 1984-06-12 1985-12-12 Siemens AG, 1000 Berlin und 8000 München Sinterkontaktwerkstoff fuer niederspannungsschaltgeraete der energietechnik und verfahren zu dessen herstellung
US4680162A (en) * 1984-12-11 1987-07-14 Chugai Denki Kogyo K.K. Method for preparing Ag-SnO system alloy electrical contact material
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
JPH03504615A (ja) * 1988-03-26 1991-10-09 ドドウコ・ゲーエムベーハー＋コンパニー・ドクトル・オイゲン・デュルベヒテル 銀‐錫酸化物系複合材料から成る電気接点用半製品および粉末冶金によるその製法
US4904317A (en) * 1988-05-16 1990-02-27 Technitrol, Inc. Erosion resistant Ag-SnO2 electrical contact material
JP2849663B2 (ja) * 1988-12-26 1999-01-20 田中貴金属工業株式会社 電気接点材料及びその製造方法
DE4201940A1 (de) * 1992-01-24 1993-07-29 Siemens Ag Sinterverbundwerkstoff fuer elektrische kontakte in schaltgeraeten der energietechnik
US5258052A (en) * 1992-06-18 1993-11-02 Advanced Metallurgy Incorporated Powder metallurgy silver-tin oxide electrical contact material
JP3441074B2 (ja) * 1992-09-16 2003-08-25 ドドウコ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング・ウント・コンパニー・ドクトル・オイゲン・デュルベヒテル 銀−錫酸化物または銀−亜鉛酸化物を基剤とする電気接点のための部材及びその製造方法
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
US20060028895A1 (en) * 2004-08-09 2006-02-09 Carl Taussig Silver island anti-fuse
CN104942277A (zh) * 2014-03-31 2015-09-30 三菱电机株式会社 一种新型纳米掺杂Ag/SnO2电触头材料的制备方法
CN110096839A (zh) * 2019-05-17 2019-08-06 西北大学 一种热压实作用强度定量计算的方法
CN112259278B (zh) * 2020-10-19 2022-05-03 西安工程大学 一种颗粒复合纤维增强铜氧化锡触头材料的制备方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4141727A (en) * 1976-12-03 1979-02-27 Matsushita Electric Industrial Co., Ltd. Electrical contact material and method of making the same
JPS6013051B2 (ja) * 1978-08-11 1985-04-04 中外電気工業株式会社 銀↓−錫↓−ビスマス系合金を内部酸化した電気接点材料の改良
GB2055398B (en) * 1979-08-01 1983-06-02 Chugai Electric Ind Co Ltd Electrical contact materials of internally oxidized ag-sn-bi alloy
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
DE3204794A1 (de) * 1981-02-12 1982-09-16 Chugai Denki Kogyo K.K., Tokyo Innen oxidierte silber-zinn-wismut-verbindung fuer elektrische kontaktmaterialien

Also Published As

Publication number Publication date
DE3460230D1 (en) 1986-07-24
JPH0586006B2 (ja) 1993-12-09
DE3305270A1 (de) 1984-08-16
ATE20506T1 (de) 1986-07-15
US4551301A (en) 1985-11-05
EP0118717B1 (de) 1986-06-18
JPS59173910A (ja) 1984-10-02
EP0118717A1 (de) 1984-09-19

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