EP0715765A1 - Kontaktwerkstoff auf silber-basis, verwendung eines solchen kontaktwerkstoffes in einem schaltgerät der energietechnik und verfahren zur herstellung des kontaktwerkstoffes - Google Patents
Kontaktwerkstoff auf silber-basis, verwendung eines solchen kontaktwerkstoffes in einem schaltgerät der energietechnik und verfahren zur herstellung des kontaktwerkstoffesInfo
- Publication number
- EP0715765A1 EP0715765A1 EP94923654A EP94923654A EP0715765A1 EP 0715765 A1 EP0715765 A1 EP 0715765A1 EP 94923654 A EP94923654 A EP 94923654A EP 94923654 A EP94923654 A EP 94923654A EP 0715765 A1 EP0715765 A1 EP 0715765A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact material
- oxide
- material according
- silver
- iron oxide
- 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
Links
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
-
- 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
- H01H2001/02378—Composite material having a noble metal as the basic material and containing oxides containing iron-oxide as major component
Definitions
- Silver-based contact material use of such a contact material in a switching device in power engineering and method for producing the contact material
- the invention relates to a contact material based on silver, wherein in addition to silver, iron oxide is present as the main active component and at least one further active component.
- the invention relates to the use of such a contact material in a switching device in power engineering and to the associated method for producing the contact material.
- contact materials are known on the one hand of the silver-metal system (AgMe) and on the other hand of the silver-metal oxide system (AgMeO).
- Representatives of the first system are, for example, silver-nickel (AgNi) or silver-iron (AgFe);
- Representatives of the second system are in particular silver-cadmium oxide (AgCdO) and silver-tin oxide (AgSnC> 2).
- other metal oxides such as bismuth oxide (Bi2C> 3), copper oxide (CuO) and / or tantalum oxide (a2Ü5) can also be used.
- the practical usability of a contact material based on silver-metal or silver-metal oxide is determined by the so-called electrical "contact property spectrum". Relevant parameters are the lifetime number of operations, on the one hand, which is determined by the erosion of the contact piece, and the so-called overtemperature, on the other hand, that is, the contact heating at the contact bridge and at the connections, which essentially results from the electrical resistance of the contact structure mentioned . It is also important that the contact pieces have a sufficiently low tendency to sweat and that they are sufficient Corrosion resistance. Because it should be noted that long-term corrosion of the material in air switching devices can change the switching properties over time.
- an electrical contact material of the silver-metal oxide system is already known, which in addition to cadmium or tin oxide can also contain iron oxide.
- DE-C-38 16 895 describes the use of a silver-iron material with 3 to 30% by weight of iron and with one or more of the additions of manganese, copper, zinc, antimony, bismuth oxide and molybdenum oxide , Tungsten oxide, chromium nitride in a total amount of 0.05 to 5% by weight, the rest silver, known for electrical contacts.
- DE-A-39 11 904 discloses a powder metallurgical process for producing a semi-finished product for electrical contacts from a silver-based composite material with iron, in which 5 to 50% by weight of iron is the first secondary component and 0 to 5% by weight. % of a second minor ingredient can be used.
- the second constituent contains one or more substances from the group consisting of the metals titanium, zircon, niobium, tantalum,
- JP-A-1/055345 discloses a material of the type mentioned at the outset, which consists of a silver matrix with 0.5 to 20 percent by weight of distributed iron oxide particles, in which part of the iron oxide is formed by at least one of the oxides of nickel, cobalt, Chromium, molybdenum, tungsten, cadmium, zinc, antimony, tin, bismuth, indium, lead, manganese, beryllium, calcium, magnesium or copper is replaced.
- the contact pieces produced from this are said to be distinguished by good mechanical properties and high arc resistance for use in switches.
- WO-A-92/22080 has already proposed a contact material in which, in addition to the iron oxide, rhenium oxide and / or bismuth zirconate and / or boron oxide as a further active component and / or zirconium oxide are present, the iron oxide being the main component in mass fractions between 1 and 50% and the secondary components in mass fractions between 0.01 and 5%.
- the iron oxide can have the constitution Fe2 ⁇ 3 or Fe O ⁇ but optionally also a mixed form.
- the object of the invention to find further silver-iron oxide-based contact materials with other secondary components and to specify the associated production process.
- the new materials should be characterized by low contact heating with stable heating behavior, low tendency to weld and a long service life in relation to the switching currents. Good corrosion resistance should also be provided.
- the further active component is an oxide of an element of the third subgroup of the periodic table.
- at least one oxide can be present which contains elements of the sixth subgroup of the periodic table.
- the iron oxide is preferably present in mass fractions of 3 to 20% and the further active component in mass fractions of 0.1 to 10%.
- the iron oxide can in particular be present either in a mass fraction of 7.5 to 15% or in a mass fraction of 4 to 7.5%, while the further oxide preferably has a mass fraction between 0.5 to 2%.
- the active component come from the Third subgroup of the periodic table, the elements scandium (Sc), yttrium (Y) and lanthanum (La) with the other lanthanides in question.
- the further active component is yttrium oxide (Y2O3).
- a material with the composition Ag / Fe2 ⁇ 3lO Y2 ⁇ 3l meets the requirements particularly well.
- ferrotungstate (FeW ⁇ 4) can be present as a further metal oxide for a material of the constitution Ag Fe2 ⁇ 3 Y2 ⁇ 3.
- a material with the composition Ag / Fe2 ⁇ 39 / Y2 ⁇ 3l FeW ⁇ 4 ⁇ , 5 has proven particularly useful.
- the new contact materials are produced by first mixing silver powder and iron oxide powder with one another in a predetermined ratio, adding the further metal oxides to this mixture and then carrying out the further processing by alternating sintering and pressing.
- the attached table shows measured values for the upper temperature of the new materials, which were measured in each case at the contact bridge of the switching device, as maximum and mean bridge temperatures, as well as measured values for the burning behavior.
- the table contains a typical example with a meaningful composition of the contact material according to the invention. Measurements were taken directly on a contact bridge of the 15KW test contactor, each with two contact pieces. The measurement results are discussed in more detail below.
- Example 1 Ag / F ⁇ 2 ⁇ 3lO / Y2 ⁇ 3l contact material
- a material with the composition Ag Fe2 ⁇ 3l0 / Y2 ⁇ 3l is to be produced.
- separate silver powder and iron oxide powder are first mixed in a predetermined ratio, and 1m% yttrium oxide powder is added to this powder mixture.
- the further production takes place in a known manner by alternating sintering and pressing under predetermined boundary conditions.
- the contact pieces are manufactured either by an extrusion technique or by a molding technique. In both cases, the backs are already in production to ensure a secure connection technology with a provide solderable and / or weldable silver layer.
- the contact pieces of the constitution Ag / Fe2 ⁇ 3 / Y2 ⁇ 3 produced in this way were subjected to comparative tests with known contact materials in the contactor specified, the results of which are shown in the table.
- the table first shows an AgNi20 contact material with the known good properties both with regard to the bridge temperature and with regard to the erosion. These values are significantly deteriorated in the case of AgFe2 ⁇ 3 contact materials with only iron oxide to replace the nickel, the maximum temperatures observed in the case of individual switching bridges being inadmissibly high in particular. An increase proportional to the oxide content is observed, while the burn-off decreases as expected.
- zirconium oxide (Zr ⁇ 2> has proven itself, the results are shown in the table.
- a low iron oxide content in particular with less than about 7.5% by mass of Fe2 ⁇ 3 #, a low maximum bridge temperature and an excellent mean bridge temperature are determined, the burn-up However, the latter only drops at higher iron oxide contents, ie from about 7.5% by weight of Fe 2 O 3, although a deterioration in the temperature behavior can be observed.
- the temperature behavior is surprisingly improved, in particular by the addition of yttrium oxide, without the burn-up deteriorating significantly.
- the yttrium oxide content can be in the range between 0.1 and 10% by weight.
- the temperature behavior of the material Ag Fe2 ⁇ 3lO Y2 ⁇ 3l in particular is directly comparable with that of AgNilO.
- the burn-up is now significantly lower than the burn-up in the known materials. For example, a burn-up of only about 20% above the silver-nickel was observed at a switching number of 50,000, while it was considerably higher for the other replacement materials.
- the properties of Ag / Fe2 ⁇ 3l0 / Y2 ⁇ 3l which are equally favorable with regard to the temperature behavior and the burning behavior, now result in the prerequisites for replacing the silver-nickel materials with the known harmful effects for a broad spectrum of applications.
- the other chemical elements of the third subgroup of the periodic table may also be considered as secondary components for an AgFe2 ⁇ 3 material.
- Example 2 Ag F ⁇ 2 ⁇ 39 / Y2 ⁇ 3l Fe ⁇ 40.5 contact material To produce this material, separate silver powder and iron oxide powder are first mixed in the specified ratio and 1% by mass yttrium oxide powder and 0.5% by mass iron tungstate powder are added to this powder mixture. The further production takes place in a known manner by alternating sintering and pressing under predetermined boundary conditions.
- contact pieces from this material takes place either by means of an extrusion technique or a molding technique. In both cases, the rear sides are provided with a solderable and / or weldable silver layer during the manufacture of the contact pieces to ensure a secure connection technique of the contact pieces.
- the contact pieces produced in this way were subjected to comparative tests with known contact materials on the one hand and the materials according to the other examples of the preceding description on the other hand.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Contacts (AREA)
- Manufacture Of Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4328281 | 1993-08-23 | ||
DE19934328281 DE4328281A1 (de) | 1993-08-23 | 1993-08-23 | Kontaktwerkstoff auf Silberbasis zur Verwendung in Schaltgeräten der Energietechnik |
DE4410462 | 1994-03-25 | ||
DE4410462A DE4410462A1 (de) | 1993-08-23 | 1994-03-25 | Kontaktwerkstoff auf Silberbasis zur Verwendung in Schaltgeräten der Energietechnik |
PCT/DE1994/000935 WO1995006321A1 (de) | 1993-08-23 | 1994-08-16 | Kontaktwerkstoff auf silber-basis, verwendung eines solchen kontaktwerkstoffes in einem schaltgerät der energietechnik und verfahren zur herstellung des kontaktwerkstoffes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0715765A1 true EP0715765A1 (de) | 1996-06-12 |
EP0715765B1 EP0715765B1 (de) | 1998-01-21 |
Family
ID=25928842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94923654A Expired - Lifetime EP0715765B1 (de) | 1993-08-23 | 1994-08-16 | Kontaktwerkstoff auf silber-basis, verwendung eines solchen kontaktwerkstoffes in einem schaltgerät der energietechnik und verfahren zur herstellung des kontaktwerkstoffes |
Country Status (8)
Country | Link |
---|---|
US (1) | US5796017A (de) |
EP (1) | EP0715765B1 (de) |
JP (2) | JP3676365B2 (de) |
CN (1) | CN1056012C (de) |
BR (1) | BR9407450A (de) |
DE (1) | DE59405126D1 (de) |
ES (1) | ES2113671T3 (de) |
WO (1) | WO1995006321A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2187801T3 (es) * | 1996-08-01 | 2003-06-16 | Metalor Technologies Int | Procedimiento de fabricacion de un producto con un material de contatacto basado en plata, el material de contacto y el producto obtenido con este material de contacto. |
CN1217365C (zh) * | 2001-07-18 | 2005-08-31 | Nec修特元件株式会社 | 热敏熔断器 |
US7131768B2 (en) * | 2003-12-16 | 2006-11-07 | Harco Laboratories, Inc. | Extended temperature range EMF device |
CN1302134C (zh) * | 2003-12-28 | 2007-02-28 | 西安工程科技学院 | 纳米SnO2/Fe2O3共混掺杂银基电接触合金及其制备工艺 |
CN1820335A (zh) * | 2004-06-18 | 2006-08-16 | 田中贵金属工业株式会社 | 密封式交流负荷用继电器以及其中使用的Ag系接点元件材料 |
CN104282448B (zh) * | 2013-08-11 | 2017-04-19 | 济南大学 | 一种耐电弧烧蚀铜基电接触复合材料 |
CN105428148B (zh) * | 2015-11-23 | 2019-03-29 | 芜湖楚江合金铜材有限公司 | 一种大功率复合电气接插件及其加工工艺 |
CN105810461A (zh) * | 2016-04-16 | 2016-07-27 | 苏州思创源博电子科技有限公司 | 一种铜基电触点材料的制备方法 |
CN106158436B (zh) * | 2016-07-20 | 2019-04-30 | 永兴金荣材料技术有限公司 | 银基电触头及其制造方法、专用设备、专用模具 |
CN107591257B (zh) * | 2017-10-20 | 2020-11-10 | 温州宏丰电工合金股份有限公司 | 一种银基多层复合电接触材料及其制备方法 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2200855A (en) * | 1939-05-02 | 1940-05-14 | Ruben Samuel | Electrical contact |
US2572662A (en) * | 1945-07-12 | 1951-10-23 | Cutler Hammer Inc | Electrical contact |
US2985532A (en) * | 1957-12-05 | 1961-05-23 | Engelhard Ind Inc | Electrical contacts |
GB1401037A (en) * | 1972-08-01 | 1975-07-16 | Square D Co | Electrical contact materials |
DE2306825B2 (de) * | 1973-02-12 | 1977-08-11 | National Research Institute For Metals, Tokio | Elektrisches kontaktmaterial aus einer silber und mindestens ein metalloxid enthaltenden legierung |
JPS512619A (en) * | 1974-06-27 | 1976-01-10 | Mitsubishi Marorii Yakin Kogyo | Gin sankabutsukeisetsutenzairyo |
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 |
US4325734A (en) * | 1980-03-27 | 1982-04-20 | Mcgraw-Edison Company | Method and apparatus for forming compact bodies from conductive and non-conductive powders |
US4426356A (en) * | 1982-09-30 | 1984-01-17 | E. I. Du Pont De Nemours And Company | Method for making capacitors with noble metal electrodes |
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 |
JPH0760623B2 (ja) * | 1986-01-21 | 1995-06-28 | 株式会社東芝 | 真空バルブ用接点合金 |
JP3298634B2 (ja) * | 1990-02-27 | 2002-07-02 | 大豊工業株式会社 | 摺動材料 |
JPH0791608B2 (ja) * | 1990-06-21 | 1995-10-04 | 松下電工株式会社 | 接点材料およびその製造方法 |
DE4117311A1 (de) * | 1991-05-27 | 1992-12-03 | Siemens Ag | Kontaktwerkstoff auf silberbasis zur verwendung in schaltgeraeten der energietechnik |
ES2086945T3 (es) * | 1992-06-10 | 1996-07-01 | Duerrwaechter E Dr Doduco | Material para contactos electricos a base de oxido de estaño y plata o de oxido de cinc y plata. |
US5258052A (en) * | 1992-06-18 | 1993-11-02 | Advanced Metallurgy Incorporated | Powder metallurgy silver-tin oxide electrical contact material |
JPH0896643A (ja) * | 1994-09-28 | 1996-04-12 | Matsushita Electric Works Ltd | 電気接点材料 |
-
1994
- 1994-08-16 WO PCT/DE1994/000935 patent/WO1995006321A1/de active IP Right Grant
- 1994-08-16 EP EP94923654A patent/EP0715765B1/de not_active Expired - Lifetime
- 1994-08-16 DE DE59405126T patent/DE59405126D1/de not_active Expired - Fee Related
- 1994-08-16 CN CN94193884A patent/CN1056012C/zh not_active Expired - Fee Related
- 1994-08-16 US US08/601,059 patent/US5796017A/en not_active Expired - Fee Related
- 1994-08-16 JP JP50725795A patent/JP3676365B2/ja not_active Expired - Fee Related
- 1994-08-16 BR BR9407450A patent/BR9407450A/pt not_active Application Discontinuation
- 1994-08-16 ES ES94923654T patent/ES2113671T3/es not_active Expired - Lifetime
-
2005
- 2005-02-02 JP JP2005026537A patent/JP2005166683A/ja active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9506321A1 * |
Also Published As
Publication number | Publication date |
---|---|
US5796017A (en) | 1998-08-18 |
JPH09501739A (ja) | 1997-02-18 |
JP3676365B2 (ja) | 2005-07-27 |
CN1056012C (zh) | 2000-08-30 |
BR9407450A (pt) | 1996-11-12 |
JP2005166683A (ja) | 2005-06-23 |
WO1995006321A1 (de) | 1995-03-02 |
EP0715765B1 (de) | 1998-01-21 |
DE59405126D1 (de) | 1998-02-26 |
ES2113671T3 (es) | 1998-05-01 |
CN1133646A (zh) | 1996-10-16 |
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