EP0508746A1 - Intern oxidierte Ag-Sn-In elektrische Kontaktwerkstofflegierungen und deren Herstellungsverfahren - Google Patents
Intern oxidierte Ag-Sn-In elektrische Kontaktwerkstofflegierungen und deren HerstellungsverfahrenInfo
- Publication number
- EP0508746A1 EP0508746A1 EP92303107A EP92303107A EP0508746A1 EP 0508746 A1 EP0508746 A1 EP 0508746A1 EP 92303107 A EP92303107 A EP 92303107A EP 92303107 A EP92303107 A EP 92303107A EP 0508746 A1 EP0508746 A1 EP 0508746A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- weight
- alloys
- electrical contact
- contact materials
- atm
- 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.)
- Withdrawn
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 51
- 239000000956 alloy Substances 0.000 title claims abstract description 51
- 239000000463 material Substances 0.000 title claims abstract description 16
- 229910018956 Sn—In Inorganic materials 0.000 title description 3
- 238000004519 manufacturing process Methods 0.000 title 1
- 239000006104 solid solution Substances 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 239000001301 oxygen Substances 0.000 claims description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 8
- 230000003647 oxidation Effects 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 3
- 239000007790 solid phase Substances 0.000 claims description 3
- 229910017980 Ag—Sn Inorganic materials 0.000 abstract description 12
- 230000000630 rising effect Effects 0.000 abstract description 4
- 229910052718 tin Inorganic materials 0.000 abstract description 2
- 229910052738 indium Inorganic materials 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
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
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1078—Alloys containing non-metals by internal oxidation of material in solid state
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/06—Alloys based on silver
Definitions
- This invention relates to those electrical contact materials which are widely used with electrical apparatuses such as switches, brakers, contactors, and so on.
- the electrical contact materials made in accordance with this invention are those made from Ag-Sn-In alloys which have been prepared by a melting method and internally oxidized, and differ from those prepared by mixing and sintering powdered Ag and oxidized and powdered Sn and In by a powder metallurgical method.
- Ag-Cd oxides alloys As an electrical contact material for the above-mentioned use, Ag-Cd oxides alloys are known. However, since Cd is harmful to health, they have been replaced by Ag-Sn oxides alloys without the employment of Cd. Such Ag-Sn oxides alloys are most extensively employed today as contact materials. Since it is considerably difficult to completely internally oxidize Sn of Ag-Sn alloys when Sn is contained therein at a rate more than 5 weight %, In is added to the alloys as an auxiliary solute metal element.
- In has to be added as much as more than 2%, although In oxides have a low refractoriness and comparatively weak in hardness. Therefore, the present inventors have pursued to internally oxidize, without the addition of In, solid-solution type alloys contained with more than 5 weight % of Sn. They were successful in the internal oxidation of such alloys which was conducted in an oxygen atmosphere of more than 10 atm, as disclosed in U.S. Patent No. 5, 078, 810.
- the present invention provides electrical contact materials made of solid-solution type alloys consisting of 5-20 weight % of Sn, more than 0.1 weight % to lett than 1 weight % of In, and the balance of Ag, and which has been internally oxidized.
- the present invention further provides a method for making electrical contact materials, which comprises activating solid-solution type alloy consisting of 5-20 weight % of Sn, more than 0.1 weight % to less than 1 weight % of In, and the balance of Ag, by preheating, followed by internally oxidizing the alloys by heating them in an oxygen atmosphere of more than 10 atmospheres to 200 atmospheres and at a temperature of 750 to 500°C to that the alloys are kept in solid phase and do not liquify.
- Ag-Sn of 5-20 weight % alloys which have been prepared by melting procedures at distinguished from powder metallurgy procedures, are internally oxidized with the addition to the alloys of a trace amount of In.
- the above-mentioned lower limit percentage of Sn is, when Sn it oxidized, to afford to the alloys such refractoriness with which they can work at electrical contacts.
- the upper limit of Sn is not to make the alloys too brittle.
- one or more of iron family elements that is, Fe, Ni, and Co may be added to the alloys at an amount of 0.001 to 1 weight % in total so as to regulate alloy structres.
- the above alloy (1), (2), and (3) were prepared by melting the above mentioned constituents and cast to ingots of 120mm in diameter and 400mm in length.
- the above alloy (4) which belongs to a prior art, was likewise made to an ingot, for its comperison with the alloys (1), (2), and (3) of this invention.
- Each alloy ingots was hot-pressed to a square bar of 30mm in thickness and 50mm in width.
- the bar was cut to a length of 500mm, and its upper and lower surfaces were shaved off in 3mm each to obtain a bar of 24mm in thickness, 50mm in width, and 500mm in length.
- pure silver of 2.5mm was hot-bonded.
- the bar was then rolled to a sheet having a thickness of 1.2mm, and punched out to obtain disk-shaped contacts of 6mm in diameter and 1.2mm in thickness. After they had been preheated in a furnace at 500°C, they were internally oxidezed by heating them to 700°C in an oxygen atmosphere of 25 atm for 48 hours.
- the aforementioned preheating of the alloys in advance of the internal oxidation is for activating them so that oxygen could penetrate smoothly into the alloys when they are subjected to baking for the internal oxidation.
- the heating temperature is selected to the lowest among the aforementioned range, the oxygen atmosphere could be made as higher as possible so far as alloys would not present a liquidous phase, about 200 atm is maximum therefor, becuase such is practical in carrying out this invention ecomonically and technically advantageously at an industrial scale.
- the electrical contact materials made in accordance with this invention are afforded with such conductivities which are satisfactory well within the range of practically employable values. And, their electrical characteristics, especially their initial contact resistances are considerably improved, and their temperature rising in use is lowed subseguently.
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)
- Manufacture Of Switches (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3164089A JPH04311543A (ja) | 1991-04-09 | 1991-04-09 | Ａｇ−ＳｎＯ−ＩｎＯ電気接点材料とその製法 |
| JP164089/91 | 1991-04-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0508746A1 true EP0508746A1 (de) | 1992-10-14 |
Family
ID=15786566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92303107A Withdrawn EP0508746A1 (de) | 1991-04-09 | 1992-04-08 | Intern oxidierte Ag-Sn-In elektrische Kontaktwerkstofflegierungen und deren Herstellungsverfahren |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0508746A1 (de) |
| JP (1) | JPH04311543A (de) |
| KR (1) | KR920019955A (de) |
| CN (1) | CN1065688A (de) |
| TW (1) | TW208720B (de) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6974923B2 (en) * | 2002-01-21 | 2005-12-13 | Sumitomo Electric Industries, Ltd. | Electric contact and breaker using the same |
| CN105489421A (zh) * | 2015-12-29 | 2016-04-13 | 桂林电器科学研究院有限公司 | 一种含添加物的银氧化镉片状电触头的制备方法 |
| CN106350692A (zh) * | 2016-09-23 | 2017-01-25 | 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 |
| CN108950257A (zh) * | 2018-07-09 | 2018-12-07 | 福达合金材料股份有限公司 | 一种提高银金属氧化物电接触材料中增强相分布均匀性的方法 |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4947850B2 (ja) * | 2001-06-01 | 2012-06-06 | 株式会社徳力本店 | Ａｇ−酸化物系電気接点材料の製造方法 |
| CN100430504C (zh) * | 2003-01-06 | 2008-11-05 | 王乃千 | 银-锡铟复合氧化物电工触点材料及其制备工艺 |
| US20050019203A1 (en) * | 2003-07-23 | 2005-01-27 | Yuhichi Saitoh | Silver alloy material, circuit substrate, electronic device, and method for manufacturing circuit substrate |
| EP2644723B1 (de) * | 2012-03-26 | 2017-01-18 | Umicore AG & Co. KG | Verbundwerkstoff |
| CN103131878B (zh) * | 2013-02-07 | 2016-04-13 | 宁波日中材料科技有限公司 | 一种银金属氧化物电触头材料制造中抑制银析出的方法 |
| CN104404419B (zh) * | 2014-11-03 | 2017-02-15 | 福达合金材料股份有限公司 | 一种高氧化物含量片状触头材料的制备方法 |
| CN105551837A (zh) * | 2015-12-29 | 2016-05-04 | 桂林电器科学研究院有限公司 | 一种含添加物的银氧化锡氧化铟片状电触头的制备方法 |
| CN108155063A (zh) * | 2018-02-09 | 2018-06-12 | 太仓神明电子有限公司 | 一种车载双子继电器及制造方法 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2394880A1 (fr) * | 1977-06-16 | 1979-01-12 | Chugai Electric Ind Co Ltd | Contact electrique composite a revetement d'alliage d'argent-oxyde d'etain |
| FR2395582A1 (fr) * | 1977-06-20 | 1979-01-19 | Chugai Electric Ind Co Ltd | Matieres pour contacts electriques en alliage d'argent et d'oxyde d'etain integre |
| DE2908923A1 (de) * | 1978-03-22 | 1979-10-04 | Chugai Electric Ind Co Ltd | Zusammengesetztes material fuer elektrische kontakte aus einer silber/zinn- legierung |
| EP0219924A1 (de) * | 1985-08-30 | 1987-04-29 | Chugai Denki Kogyo Kabushiki Kaisha | Werkstoffe für elektrische Kontakte und Verfahren zu ihrer Herstellung |
-
1991
- 1991-04-09 JP JP3164089A patent/JPH04311543A/ja active Pending
-
1992
- 1992-03-27 TW TW081102359A patent/TW208720B/zh active
- 1992-04-07 KR KR1019920005916A patent/KR920019955A/ko not_active Application Discontinuation
- 1992-04-08 EP EP92303107A patent/EP0508746A1/de not_active Withdrawn
- 1992-04-08 CN CN92102222A patent/CN1065688A/zh active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2394880A1 (fr) * | 1977-06-16 | 1979-01-12 | Chugai Electric Ind Co Ltd | Contact electrique composite a revetement d'alliage d'argent-oxyde d'etain |
| FR2395582A1 (fr) * | 1977-06-20 | 1979-01-19 | Chugai Electric Ind Co Ltd | Matieres pour contacts electriques en alliage d'argent et d'oxyde d'etain integre |
| DE2908923A1 (de) * | 1978-03-22 | 1979-10-04 | Chugai Electric Ind Co Ltd | Zusammengesetztes material fuer elektrische kontakte aus einer silber/zinn- legierung |
| EP0219924A1 (de) * | 1985-08-30 | 1987-04-29 | Chugai Denki Kogyo Kabushiki Kaisha | Werkstoffe für elektrische Kontakte und Verfahren zu ihrer Herstellung |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6974923B2 (en) * | 2002-01-21 | 2005-12-13 | Sumitomo Electric Industries, Ltd. | Electric contact and breaker using the same |
| CN105489421A (zh) * | 2015-12-29 | 2016-04-13 | 桂林电器科学研究院有限公司 | 一种含添加物的银氧化镉片状电触头的制备方法 |
| CN106350692A (zh) * | 2016-09-23 | 2017-01-25 | 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 |
| 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 |
| CN108950257A (zh) * | 2018-07-09 | 2018-12-07 | 福达合金材料股份有限公司 | 一种提高银金属氧化物电接触材料中增强相分布均匀性的方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1065688A (zh) | 1992-10-28 |
| KR920019955A (ko) | 1992-11-20 |
| TW208720B (de) | 1993-07-01 |
| JPH04311543A (ja) | 1992-11-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
| 17P | Request for examination filed |
Effective date: 19930211 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 19931105 |