EP0369283A2 - Matériau de contact fritté pour appareillages interrupteurs à basse tension de la technique de l'énergie, spécialement pour des contacteurs - Google Patents

Matériau de contact fritté pour appareillages interrupteurs à basse tension de la technique de l'énergie, spécialement pour des contacteurs Download PDF

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Publication number
EP0369283A2
EP0369283A2 EP89120515A EP89120515A EP0369283A2 EP 0369283 A2 EP0369283 A2 EP 0369283A2 EP 89120515 A EP89120515 A EP 89120515A EP 89120515 A EP89120515 A EP 89120515A EP 0369283 A2 EP0369283 A2 EP 0369283A2
Authority
EP
European Patent Office
Prior art keywords
bismuth
oxide
contact material
zirconate
sintered contact
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.)
Granted
Application number
EP89120515A
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German (de)
English (en)
Other versions
EP0369283B1 (fr
EP0369283A3 (fr
Inventor
Wolfgang Haufe
Ralf-Dieter Dipl.-Ing. Krause
Bernhard Rothkegel
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
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0369283A2 publication Critical patent/EP0369283A2/fr
Publication of EP0369283A3 publication Critical patent/EP0369283A3/fr
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Publication of EP0369283B1 publication Critical patent/EP0369283B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the invention relates to a sintered contact material for low-voltage switching devices in energy technology, in particular for motor contactors, containing silver (Ag), tin oxide (SnO2), bismuth oxide (Bi2O3) and copper oxide (CuO) and made from an internally oxidized alloy powder (IOLP) of the metals silver, tin , Bismuth and copper, the tin oxide being present in mass fractions of 4 to 12% and the ratio of the mass fractions of tin oxide to bismuth oxide on the one hand and of tin oxide to copper oxide in the internally oxidized alloy powder, respectively, between 8: 1 and 12: 1.
  • Contact materials based on silver-tin oxide have proven to be particularly advantageous for use in low-voltage switchgear in power engineering, for example in motor contactors, but also in circuit breakers.
  • Contact pieces made of silver-tin oxide have a long service life in motor contactors, but have the disadvantage that thermally very stable oxide layers are formed on the contact surfaces when exposed to arcing, which leads to increased contact resistance. This leads to inadmissibly high excess temperatures on the switching elements when the continuous current is conducted in the switching device, which in particular can lead to damage to the plastic parts.
  • DE-OS 34 21 758 and DE-OS 34 21 759 sintered contact materials of the constitution AgSnO2Bi2O3CuO are described which are made from internally oxidized alloy powders and describe the demands made today on the number of lifespans and on the other hand meet the switch-on capacity.
  • These materials can have a relatively high bismuth oxide content, which is introduced either via the internally oxidized alloy powder or via a separate admixture of the bismuth oxide to the internally oxidized alloy powder.
  • these materials only reach acceptable values with regard to overtemperature if the total mass fraction of oxide is limited to 8% to 11%.
  • the object of the invention is therefore to create a material of the constitution AgSnO2Bi2O3CuO made of internally oxidized alloy powder, in which the silver content is as high as possible and the excess temperature as low as possible and in which the other properties are left in an optimal ratio to one another in order to save silver.
  • bismuth zirconate (2Bi2O3.3ZrO2) and / or bismuth titanate (Bi2Ti2O7) is also present in a contact material made of the internally oxidized alloy powder of the type mentioned.
  • the bismuth zirconate and / or the bismuth titanate are / are partially present as a mixed oxide or in a stoichiometric compound.
  • the mass fraction of bismuth zirconate and / or bismuth titanate is preferably between 0.1 and 5%, the total content of the oxides in mass fractions being a maximum of 20%.
  • bismuth zirconate powder and / or bismuth titanate powder are added to an internally oxidized alloy powder of a predetermined composition, organic solvents, in particular propanol, being used when the internally oxidized alloy powder is mixed with the powder of the additional oxides.
  • the lifetime switching number corresponds to the volume erosion of the contact material and the overtemperature corresponds to the contact resistance.
  • alloys made of AgSnBiCu are melted at a temperature of approximately 1323 K (1050 ° C.). Alloy powders of the same composition are obtained by atomizing the melt with water in a pressure atomization system. After drying, the powders are sieved to ⁇ 300 ⁇ m.
  • the specified AgSnO2Bi2O3CuO powders are powdered from bismuth zirconate (2Bi2O3.3ZrO2) and / or bismuth titanate (Bi2Ti2O7) added by wet mixing in a stirred ball mill using propanol and steel balls. After the mixture has dried, the steel balls are separated from the respective powder mixture by sieving.
  • the starting powders for the contact piece production of the material examples given in the table are composed as follows: 1. AgSnO29.3 Bi2O30.93 CuO0.93 + 2Bi2O3.3ZrO21.0 IOLP - PM 2. AgSnO28.0 Bi2O30.80 CuO0.80 + 2Bi2O3.3ZrO22.0 IOLP - PM 3.
  • the internally oxidized alloy powder forms the basis with 100 percent by mass to which the additional oxides are added in percent by mass.
  • the starting powder mixture produced is compressed with a pressing pressure of, for example, 600 MPa and the pressed bodies obtained are at a temperature between 1123 K (850 ° C.) and 1148 K (875 ° C.) sintered in air for 2 h.
  • the sintered contact pieces are hot pressed at a temperature of 923 K (650 ° C) and a pressure of, for example, 1000 MPa.
  • the grain size which can be controlled by the sintering temperature and duration, runs as a front inside the AgSnO2Bi2O3CuO powder particles 1.
  • the oxide precipitates 2 have an elongated, partly streak-like shape and are high in zirconate and / or titanium.
  • the structure of the structure according to the figure has a favorable influence on the electrical conductivity of the oxide layers which form on the contact surfaces when exposed to arcing.
  • contact pieces for use as contact pieces in low voltage switchgear Advices of energy technology are expediently made of two-layer finished molded parts with a solderable pure silver layer. These molded parts can be soldered directly onto the contact carrier, for example by motor contactors.
  • the new materials which were produced by sintering an internally oxidized alloy powder with the addition of bismuth zirconate powder and / or bismuth titanate powder, in particular with a total mass fraction of about 12% oxide, give the required improvement in the overtemperature behavior. Values from 60 K to 70 K were measured, the lifetime switching number remaining at the same high level of the prior art. The range of properties is thus improved overall, with silver being saved in any case.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Contacts (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Manufacture Of Switches (AREA)
EP89120515A 1988-11-17 1989-11-06 Matériau de contact fritté pour appareillages interrupteurs à basse tension de la technique de l'énergie, spécialement pour des contacteurs Expired - Lifetime EP0369283B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3838950 1988-11-17
DE3838950 1988-11-17

Publications (3)

Publication Number Publication Date
EP0369283A2 true EP0369283A2 (fr) 1990-05-23
EP0369283A3 EP0369283A3 (fr) 1991-03-13
EP0369283B1 EP0369283B1 (fr) 1994-09-14

Family

ID=6367374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89120515A Expired - Lifetime EP0369283B1 (fr) 1988-11-17 1989-11-06 Matériau de contact fritté pour appareillages interrupteurs à basse tension de la technique de l'énergie, spécialement pour des contacteurs

Country Status (5)

Country Link
US (1) US4980125A (fr)
EP (1) EP0369283B1 (fr)
JP (1) JP2810162B2 (fr)
BR (1) BR8905828A (fr)
DE (1) DE58908359D1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022080A1 (fr) * 1991-05-27 1992-12-10 Siemens Aktiengesellschaft Materiau de contact a base d'argent pour l'utilisation dans des appareils de commutation en technologie des courants forts, ainsi que procede pour la fabrication de pieces de contact en ce materiau
WO1993026021A1 (fr) * 1992-06-10 1993-12-23 Doduco Gmbh + Co. Matiere pour contacts electriques a base d'oxyde d'etain et d'argent ou d'oxyde de zinc et d'argent
DE4331526A1 (de) * 1992-09-16 1994-03-17 Duerrwaechter E Dr Doduco Werkstoff für elektrische Kontakte auf der Basis von Silber-Zinnoxid oder Silber-Zinkoxid und Verfahren zu seiner Herstellung
CN113502414A (zh) * 2021-06-10 2021-10-15 暨南大学 一种高导热航空铝合金及其在制备超大面积led光源散热器中的应用

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4201940A1 (de) * 1992-01-24 1993-07-29 Siemens Ag Sinterverbundwerkstoff fuer elektrische kontakte in schaltgeraeten der energietechnik
DE19503182C1 (de) * 1995-02-01 1996-05-15 Degussa Sinterwerkstoff auf der Basis Silber-Zinnoxid für elektrische Kontakte und Verfahren zu dessen Herstellung
US20090202855A1 (en) * 2008-01-09 2009-08-13 Saxton David M Porous sliding bearing and method of construction thereof
US8320089B1 (en) 2009-04-16 2012-11-27 Musco Corporation Apparatus, method, and system for integrating ground fault circuit interrupters in equipment-grounded high voltage systems
CN108772053B (zh) * 2018-06-29 2020-12-15 辽宁石油化工大学 一种钛酸铋/氧化铋光催化剂及其制备方法和应用

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232627A1 (de) * 1981-09-24 1983-04-07 Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim Werkstoff fuer elektrische kontakte
EP0164664A2 (fr) * 1984-06-12 1985-12-18 Siemens Aktiengesellschaft Matériau de contact fritté pour appareillages interrupteurs à basse tension de la technique de l'énergie
EP0170812A2 (fr) * 1984-06-12 1986-02-12 Siemens Aktiengesellschaft Procédé pour la fabrication de matériau de contact fritté
EP0182386A2 (fr) * 1983-02-10 1986-05-28 Siemens Aktiengesellschaft Procédé de fabrication de pièces de contact

Family Cites Families (3)

* 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
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
DE3466122D1 (en) * 1984-01-30 1987-10-15 Siemens Ag Contact material and production of electric contacts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232627A1 (de) * 1981-09-24 1983-04-07 Doduco KG Dr. Eugen Dürrwächter, 7530 Pforzheim Werkstoff fuer elektrische kontakte
EP0182386A2 (fr) * 1983-02-10 1986-05-28 Siemens Aktiengesellschaft Procédé de fabrication de pièces de contact
EP0164664A2 (fr) * 1984-06-12 1985-12-18 Siemens Aktiengesellschaft Matériau de contact fritté pour appareillages interrupteurs à basse tension de la technique de l'énergie
EP0170812A2 (fr) * 1984-06-12 1986-02-12 Siemens Aktiengesellschaft Procédé pour la fabrication de matériau de contact fritté

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992022080A1 (fr) * 1991-05-27 1992-12-10 Siemens Aktiengesellschaft Materiau de contact a base d'argent pour l'utilisation dans des appareils de commutation en technologie des courants forts, ainsi que procede pour la fabrication de pieces de contact en ce materiau
WO1993026021A1 (fr) * 1992-06-10 1993-12-23 Doduco Gmbh + Co. Matiere pour contacts electriques a base d'oxyde d'etain et d'argent ou d'oxyde de zinc et d'argent
US5610347A (en) * 1992-06-10 1997-03-11 Doduco Gmbh & Co. Dr. Eugen Durrwachter Material for electric contacts taking silver-tin oxide or silver-zinc oxide as basis
CN1036099C (zh) * 1992-06-10 1997-10-08 欧根·迪尔瓦克特博士多杜科股份公司 以银-氧化锡或银-氧化锌为基础的电接触材料
DE4331526A1 (de) * 1992-09-16 1994-03-17 Duerrwaechter E Dr Doduco Werkstoff für elektrische Kontakte auf der Basis von Silber-Zinnoxid oder Silber-Zinkoxid und Verfahren zu seiner Herstellung
DE4331526C2 (de) * 1992-09-16 1998-07-30 Duerrwaechter E Dr Doduco Werkstoff für elektrische Kontakte auf der Basis von Silber-Zinnoxid oder Silber-Zinkoxid und Verfahren zur Herstellung eines Verbundpulvers hierfür
US5822674A (en) * 1992-09-16 1998-10-13 Doduco Gmbh + Co. Dr. Eugen Durrwachter Electrical contact material and method of making the same
DE4331526C3 (de) * 1992-09-16 2003-11-06 Ami Doduco Gmbh Werkstoff für elektrische Kontakte auf der Basis von Silber-Zinnoxid oder Silber-Zinkoxid und Verfahren zur Herstellung eines Verbundpulvers hierfür
CN113502414A (zh) * 2021-06-10 2021-10-15 暨南大学 一种高导热航空铝合金及其在制备超大面积led光源散热器中的应用
CN113502414B (zh) * 2021-06-10 2022-01-07 暨南大学 一种高导热航空铝合金及其在制备超大面积led光源散热器中的应用

Also Published As

Publication number Publication date
JPH02185937A (ja) 1990-07-20
BR8905828A (pt) 1990-06-12
DE58908359D1 (de) 1994-10-20
EP0369283B1 (fr) 1994-09-14
JP2810162B2 (ja) 1998-10-15
EP0369283A3 (fr) 1991-03-13
US4980125A (en) 1990-12-25

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