CA1119433A - Sintered contact material of silver and embedded metal oxides - Google Patents
Sintered contact material of silver and embedded metal oxidesInfo
- Publication number
- CA1119433A CA1119433A CA000293863A CA293863A CA1119433A CA 1119433 A CA1119433 A CA 1119433A CA 000293863 A CA000293863 A CA 000293863A CA 293863 A CA293863 A CA 293863A CA 1119433 A CA1119433 A CA 1119433A
- Authority
- CA
- Canada
- Prior art keywords
- contact material
- sintered
- silver
- sintered contact
- zones
- 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
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
-
- 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
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12063—Nonparticulate metal component
- Y10T428/12139—Nonmetal particles in particulate component
-
- 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
- Y10T428/12028—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, etc.]
- Y10T428/12146—Nonmetal particles in a component
-
- 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
- Y10T428/12167—Nonmetal containing
Abstract
Abstract of the Disclosure A sintered contact material of silver and at least two embedded metal oxides for use in electrical contacts in which the metal oxides are distributed alternatingly in the sliver in different microscopic zones of the sintered contact material.
Description
~L9~33 This invention relates to sintered contacts in general and more particularly -to an improT~ed sintered contact material of silver and at least two embedded metal oxides and a method for the manufacture thereof.
In many applications, pure silver is not sui-ted as a material for elec-trical contact elements. For, the silver surface is frequently partially melted and splattered in the arc which is generated in switching processes, particularly if contacts chatter when being closed. This leads, on the one hand, to a large amount of material burn-off and, on the other hand, also causes the contac-t elemen-ts to weld -together, so that the latter can be separated only by the application of a force (known as the welding force). By embedding metal oxides, such as cadmium oxide, the welding force and the burn-off of silver contact elements can be reduced. Oxides of the metals copper, magnesium, calcium, zinc, cadmium, aluminum, indium, lanthanium, silicon, -tin, cerium, samarium, lead, -titatium, zirconium, antimony, bismuth, tellurium, chromium, molybdenum, manganese, iron, cobalt or nickel have also already been proposed singly or in combinations as embedments for silver containing contact materials. These additives are aslo used to improve other properties, for instance, arc propaga-tion properties or contact resistance, to adapt the properties of the contact ma-terial to the requirements placed on the electrical contacts. In general, however, a measure which leads to an improvement of one property, e.g., the arc burn-off, causes a degradation of the other properties, e.g., the welding force.
Such contact materials can be produced by internal oxidation of an alloy powder of the metals in question and by pressing, sintering and coining by powder metallurgical methods. The size and distribu-tion of the oxide particles contained in the silver then depends largely on the manner of the production. As a rule, small particle si%e and a distribut:ion as uniform as possib]e is desired.
It is an object of the present invention to describe a material for a contact which consists of silver, as the base metal, and of a metal oxide, 1~ 3~
where, through the addition of at least one further metal oxide, one property of the material is improved without at the same time degrading other properties. Thus, for instance, the burn-off of an AgCdO contact element is to be improved and the welding force kept as small as possible at the same time.
According to one aspect of the present invention there is provided a sintered contact material of silver and at least two different metal oxides embedded therein, the different metal oxides being distributed in the silver alternatingly in different microscopic zones of the sintered contact material, the ratio of *he total volume of all zones in which one of the metal oxides is distributed, to the total volume of all zones in which another metal oxide is distributed, being from 0.1 to 1.
Another aspect of the invention provides a method for manufacturing a sintered contact material of silver and at least two embedded oxides comprising preparing at least two composite powders of silver and at least one metal oxide using at least two different metal oxide components the volume ratio of the one composite powder to the other being from O.l to l;
intimately mixing the composite powders with each other; pressing the resul~ing mixture to form a shaped body; and subsequently sintering the shaped body.
Metal oxides which are of interest include the oxides of all metals which are suitable at all for use in silver containing materials. A
number of such metal oxide additions which have already been proposed and tried for contact materials, were given at the outset.
In the sintered contact material according to the present invention, the metal oxides are therefore not distributed uniformly over the entire sintered contact material, i.e., all metal oxides are not present in the silver with the same concentration in every zone. The sintered contact material rather consists of different adjacent microscopic zones, the one metal oxide or a group of metal oxides being contained in one zone, J ~`
t3;~
but another metal oxide or another group of me-tal oxides in the adjacent zone. Thus, for instance, zones of AgMe10 alternate side by side with zones of AgMe20 where Mel and Me2 stand for different non-rare metals.
The mean "particle size" of the different AgMeO zones is preferably between 0.05 and 0.5 mm. In particular, the mean size is advantageously less than 0.2 mm.
The metal oxides are advantageously distributed in the ~orm of particles with a mean size of between 0.1 and 30 lnn in the indiviclual zones. The mean size of the oxide particles is preferably above 0.5_um.
5 um can advantageously be given as an upper limit for the mean size of the oxide particles.
The sintered contact material can be further fabricated into - 2a -'~`
semifinished material by extrusion or rolling. Thereby, a special structure or orientation of` the zones or the oxide par-ticles can be achieved. However, the sintered contact material can also be shaped into contact elements f`or electrical contacts during its manufacture.
For manufacturing the sintered contac-t material according to the present invention, a method in which at least two composite silver/metal oxide powders are throughly mixed with each other and pressed into a shaped body, and the shaped body subsequently then sintered is particularly well suited.
The sintered shaped body can subsequently be densified by coining into a final form, e.g., a contact element. However, it can also be processed further by extrusion or rolling into semifinished material.
As is customary in powder metallurgy, a composite powder is under-stood to be a powder having individual particles which already consist of two or more materials. For the mamlfac-ture of the sintered contact material, one therefore starts out with as many different composite powders as there are zones of different composition to be provided in the sintered contact material.
Each composite powder consists of silver and the metal oxide or metal oxides which are to be contained in the respective zone.
~uilding up the sintered contact material from zones of different composition makes it possible to improve one property in the one zone (e.g., -the burn-off), while, however, the degradation of another property (e.g., the welding force) brought abou-t in this zone is compensated or overcompensated by -the metal oxide addition in another zone, so that, overall, an improvement of the entire spectrum of properties of the finished material is achieved.
The volume ratios of the amounts of the composite powders to be mixed together are advantageously between 0.1 and 1. In the sintered contact material, the total volume of all zones, in which one of the metal oxides is distributed, is then in the same ratio to the total volume of all zones, in which ano~ther metal oxide is distributed.
The invention will now be explained in detail with the aid of -two examples.
Example 1 For contac-t elements, particularly in low voltage switchgear, a material wi-th a small welding force and at the same time low burn~off is required. A contact material with silver as the base metal and 6% by weight cadmium oxide and 3.75% by weight zinc oxide, relative to the finished material, which is made from a homogenenous mixture of these components, does not meet these requirements fully and is to be improved.
Through internal oxida-tion of the respective alloy powders, a composite powder of AgCdO with 12% by weight CdO and a composite powder of AgZnO with 7.5% by weight ZnO were prepared. The particle size of both powders was below 0.2 mm. The composite powders were the intimate:Ly mixed in the weight ratio of 1 :1 and densified into a shaped part in a die at a pressure of 600 NM/m . The pressed body was subsequently sintered for 1 hour in air at 85Q C. By coining with a pressure of 800 NM/m2, the shaped part was given the desired final form of the con-tact element, a volumetric filling factor of 0.99 being obtained.
The shaped piece had the composition AgCdO6ZnO 3.75 and was tested in a test switch wi-th a closing current I = LOOO A and an opening current I =
1500 A. As compared to the contact element of the same composition, in which the oxides are distributed ~miformLy, the burn-off value was 25% and the weld-ing force 50% bet-ter.
Ex~nple 2 Through internal oxida-tion, composite AgCuO and AgCdOBi203 powders were prepared f`rom AgCu and AgCdBi alloy powders. The CuO and the CdO volume content was 15% and the Bi203 volume content 1%. The mean particle size of both powders was below 0.15 mm. The two composite powders were mixed in a weight ratio of 1 :1 and densified in a die with a pressure of 600 MN/m2 into a shaped part. The pressed body was subsequently sintered for 1 hour in air at 850 C. By hot coining the sintered body with a pressure of 600 ~N/m2, post-sin-tering at 800 C for 1 hour in nitrogen and cold coining with a pressure of oO0 ~/m , the shaped part was given the desired final form. The volumetric filling factor was above 0.99. As compared to the contac-t element of the same composition prepared ~rom the powder mixture of silver powder and the metal oxides, the welding force was more -than 50~ lower, while the burn-off value was abou-t the same.
In many applications, pure silver is not sui-ted as a material for elec-trical contact elements. For, the silver surface is frequently partially melted and splattered in the arc which is generated in switching processes, particularly if contacts chatter when being closed. This leads, on the one hand, to a large amount of material burn-off and, on the other hand, also causes the contac-t elemen-ts to weld -together, so that the latter can be separated only by the application of a force (known as the welding force). By embedding metal oxides, such as cadmium oxide, the welding force and the burn-off of silver contact elements can be reduced. Oxides of the metals copper, magnesium, calcium, zinc, cadmium, aluminum, indium, lanthanium, silicon, -tin, cerium, samarium, lead, -titatium, zirconium, antimony, bismuth, tellurium, chromium, molybdenum, manganese, iron, cobalt or nickel have also already been proposed singly or in combinations as embedments for silver containing contact materials. These additives are aslo used to improve other properties, for instance, arc propaga-tion properties or contact resistance, to adapt the properties of the contact ma-terial to the requirements placed on the electrical contacts. In general, however, a measure which leads to an improvement of one property, e.g., the arc burn-off, causes a degradation of the other properties, e.g., the welding force.
Such contact materials can be produced by internal oxidation of an alloy powder of the metals in question and by pressing, sintering and coining by powder metallurgical methods. The size and distribu-tion of the oxide particles contained in the silver then depends largely on the manner of the production. As a rule, small particle si%e and a distribut:ion as uniform as possib]e is desired.
It is an object of the present invention to describe a material for a contact which consists of silver, as the base metal, and of a metal oxide, 1~ 3~
where, through the addition of at least one further metal oxide, one property of the material is improved without at the same time degrading other properties. Thus, for instance, the burn-off of an AgCdO contact element is to be improved and the welding force kept as small as possible at the same time.
According to one aspect of the present invention there is provided a sintered contact material of silver and at least two different metal oxides embedded therein, the different metal oxides being distributed in the silver alternatingly in different microscopic zones of the sintered contact material, the ratio of *he total volume of all zones in which one of the metal oxides is distributed, to the total volume of all zones in which another metal oxide is distributed, being from 0.1 to 1.
Another aspect of the invention provides a method for manufacturing a sintered contact material of silver and at least two embedded oxides comprising preparing at least two composite powders of silver and at least one metal oxide using at least two different metal oxide components the volume ratio of the one composite powder to the other being from O.l to l;
intimately mixing the composite powders with each other; pressing the resul~ing mixture to form a shaped body; and subsequently sintering the shaped body.
Metal oxides which are of interest include the oxides of all metals which are suitable at all for use in silver containing materials. A
number of such metal oxide additions which have already been proposed and tried for contact materials, were given at the outset.
In the sintered contact material according to the present invention, the metal oxides are therefore not distributed uniformly over the entire sintered contact material, i.e., all metal oxides are not present in the silver with the same concentration in every zone. The sintered contact material rather consists of different adjacent microscopic zones, the one metal oxide or a group of metal oxides being contained in one zone, J ~`
t3;~
but another metal oxide or another group of me-tal oxides in the adjacent zone. Thus, for instance, zones of AgMe10 alternate side by side with zones of AgMe20 where Mel and Me2 stand for different non-rare metals.
The mean "particle size" of the different AgMeO zones is preferably between 0.05 and 0.5 mm. In particular, the mean size is advantageously less than 0.2 mm.
The metal oxides are advantageously distributed in the ~orm of particles with a mean size of between 0.1 and 30 lnn in the indiviclual zones. The mean size of the oxide particles is preferably above 0.5_um.
5 um can advantageously be given as an upper limit for the mean size of the oxide particles.
The sintered contact material can be further fabricated into - 2a -'~`
semifinished material by extrusion or rolling. Thereby, a special structure or orientation of` the zones or the oxide par-ticles can be achieved. However, the sintered contact material can also be shaped into contact elements f`or electrical contacts during its manufacture.
For manufacturing the sintered contac-t material according to the present invention, a method in which at least two composite silver/metal oxide powders are throughly mixed with each other and pressed into a shaped body, and the shaped body subsequently then sintered is particularly well suited.
The sintered shaped body can subsequently be densified by coining into a final form, e.g., a contact element. However, it can also be processed further by extrusion or rolling into semifinished material.
As is customary in powder metallurgy, a composite powder is under-stood to be a powder having individual particles which already consist of two or more materials. For the mamlfac-ture of the sintered contact material, one therefore starts out with as many different composite powders as there are zones of different composition to be provided in the sintered contact material.
Each composite powder consists of silver and the metal oxide or metal oxides which are to be contained in the respective zone.
~uilding up the sintered contact material from zones of different composition makes it possible to improve one property in the one zone (e.g., -the burn-off), while, however, the degradation of another property (e.g., the welding force) brought abou-t in this zone is compensated or overcompensated by -the metal oxide addition in another zone, so that, overall, an improvement of the entire spectrum of properties of the finished material is achieved.
The volume ratios of the amounts of the composite powders to be mixed together are advantageously between 0.1 and 1. In the sintered contact material, the total volume of all zones, in which one of the metal oxides is distributed, is then in the same ratio to the total volume of all zones, in which ano~ther metal oxide is distributed.
The invention will now be explained in detail with the aid of -two examples.
Example 1 For contac-t elements, particularly in low voltage switchgear, a material wi-th a small welding force and at the same time low burn~off is required. A contact material with silver as the base metal and 6% by weight cadmium oxide and 3.75% by weight zinc oxide, relative to the finished material, which is made from a homogenenous mixture of these components, does not meet these requirements fully and is to be improved.
Through internal oxida-tion of the respective alloy powders, a composite powder of AgCdO with 12% by weight CdO and a composite powder of AgZnO with 7.5% by weight ZnO were prepared. The particle size of both powders was below 0.2 mm. The composite powders were the intimate:Ly mixed in the weight ratio of 1 :1 and densified into a shaped part in a die at a pressure of 600 NM/m . The pressed body was subsequently sintered for 1 hour in air at 85Q C. By coining with a pressure of 800 NM/m2, the shaped part was given the desired final form of the con-tact element, a volumetric filling factor of 0.99 being obtained.
The shaped piece had the composition AgCdO6ZnO 3.75 and was tested in a test switch wi-th a closing current I = LOOO A and an opening current I =
1500 A. As compared to the contact element of the same composition, in which the oxides are distributed ~miformLy, the burn-off value was 25% and the weld-ing force 50% bet-ter.
Ex~nple 2 Through internal oxida-tion, composite AgCuO and AgCdOBi203 powders were prepared f`rom AgCu and AgCdBi alloy powders. The CuO and the CdO volume content was 15% and the Bi203 volume content 1%. The mean particle size of both powders was below 0.15 mm. The two composite powders were mixed in a weight ratio of 1 :1 and densified in a die with a pressure of 600 MN/m2 into a shaped part. The pressed body was subsequently sintered for 1 hour in air at 850 C. By hot coining the sintered body with a pressure of 600 ~N/m2, post-sin-tering at 800 C for 1 hour in nitrogen and cold coining with a pressure of oO0 ~/m , the shaped part was given the desired final form. The volumetric filling factor was above 0.99. As compared to the contac-t element of the same composition prepared ~rom the powder mixture of silver powder and the metal oxides, the welding force was more -than 50~ lower, while the burn-off value was abou-t the same.
Claims (11)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A sintered contact material of silver and at least two different metal oxides embedded therein, the different metal oxides being distributed in the silver alternatingly in differ-ent microscopic zones of the sintered contact material, the ratio of the total volume of all zones in which one of the metal oxides is distributed, to the total volume of all zones in which another metal oxide is distributed, being from 0.1 to 1.
2. The sintered contact material according to claim 1, wherein the mean size of said zones is between 0.05 and 0.5 mm.
3. The sintered contact material according to claim 2, wherein the mean size of said zones is between 0.05 and 0.2 mm.
4. The sintered contact material according to claim 1, wherein said metal oxides are distributed in the individual zones in the form of particles with a mean size of between 0.1 and 20 µm.
5. The sintered contact material according to claim 4, wherein the mean size of the oxide particles is above 0.5 µm.
6. The sintered contact material according to claim 4 wherein the mean size of the oxide particles is less than 0.5 µm.
7. The sintered contact material according to claim 1, wherein said material is a semifinished material.
8. The sintered contact material according to claim 1, wherein said material is a contact element for electrical contacts.
9. A method for manufacturing a sintered contact material of silver and at least two embedded oxides comprising preparing at least two composite powders of silver and at least one metal oxide using at least two different metal oxide com-ponents the volume ratio of the one composite powder to the other being from 0.1 to 1; intimately mixing the composite powders with each other; pressing the resulting mixture to form a shaped body; and subsequently sintering the shaped body.
10. The method according to claim 9, and further in-cluding subsequently densifying the sintered shaped body into the final form by coining.
11. The method according to claim 9, and further in-cluding subsequently densifying the sintered shaped body into a semifinished material by extrusion or rolling.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2659012.5 | 1976-12-27 | ||
| DE2659012A DE2659012C3 (en) | 1976-12-27 | 1976-12-27 | Process for producing a sintered contact material from silver and embedded metal oxides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1119433A true CA1119433A (en) | 1982-03-09 |
Family
ID=5996746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000293863A Expired CA1119433A (en) | 1976-12-27 | 1977-12-23 | Sintered contact material of silver and embedded metal oxides |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US4204863A (en) |
| JP (1) | JPS6038452B2 (en) |
| BR (1) | BR7708621A (en) |
| CA (1) | CA1119433A (en) |
| DE (1) | DE2659012C3 (en) |
| FR (1) | FR2375705A1 (en) |
| IN (1) | IN149248B (en) |
Families Citing this family (44)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4294616A (en) * | 1979-01-02 | 1981-10-13 | Gte Products Corporation | Electrical contacts |
| DE3017424A1 (en) * | 1980-05-07 | 1981-11-12 | Degussa Ag, 6000 Frankfurt | MATERIAL FOR ELECTRICAL CONTACTS |
| JPS5741338A (en) * | 1980-08-26 | 1982-03-08 | Tanaka Kikinzoku Kogyo Kk | Composite electrical contact material |
| DE3102067A1 (en) * | 1981-01-23 | 1982-08-19 | Degussa Ag, 6000 Frankfurt | MATERIAL FOR ELECTRICAL CONTACTS |
| JPS57154717A (en) * | 1981-03-19 | 1982-09-24 | Tanaka Precious Metal Ind | Electric contact |
| DE3116442C2 (en) * | 1981-04-24 | 1986-10-16 | Siemens AG, 1000 Berlin und 8000 München | Sintered contact material |
| US4415624A (en) * | 1981-07-06 | 1983-11-15 | Rca Corporation | Air-fireable thick film inks |
| US4429003A (en) * | 1981-10-05 | 1984-01-31 | Norton Co. | Protective coating for porous refractories |
| JPS5887242A (en) * | 1981-11-19 | 1983-05-25 | Tanaka Kikinzoku Kogyo Kk | Sliding contact material |
| JPS5896835A (en) * | 1981-12-02 | 1983-06-09 | Tanaka Kikinzoku Kogyo Kk | Electric contact material |
| JPS58107441A (en) * | 1981-12-17 | 1983-06-27 | Tanaka Kikinzoku Kogyo Kk | Material for sliding contact |
| JPS58107443A (en) * | 1981-12-17 | 1983-06-27 | Tanaka Kikinzoku Kogyo Kk | Material for sliding contact |
| JPS58107449A (en) * | 1981-12-18 | 1983-06-27 | Tanaka Kikinzoku Kogyo Kk | Material for slide contact |
| JPS58107447A (en) * | 1981-12-18 | 1983-06-27 | Tanaka Kikinzoku Kogyo Kk | Material for sliding contact |
| JPS58107458A (en) * | 1981-12-22 | 1983-06-27 | Tanaka Kikinzoku Kogyo Kk | Material for slide contact |
| JPS58110638A (en) * | 1981-12-23 | 1983-07-01 | Tanaka Kikinzoku Kogyo Kk | Sliding contact material |
| DE3304637A1 (en) * | 1983-02-10 | 1984-08-16 | Siemens AG, 1000 Berlin und 8000 München | SINTER CONTACT MATERIAL FOR LOW VOLTAGE SWITCHGEAR |
| US4472258A (en) * | 1983-05-03 | 1984-09-18 | Great Lakes Carbon Corporation | Anode for molten salt electrolysis |
| DE3405218A1 (en) * | 1984-02-14 | 1985-09-05 | Siemens AG, 1000 Berlin und 8000 München | Sintered contact material and method for the preparation thereof |
| JPS60181249A (en) * | 1984-02-27 | 1985-09-14 | Chugai Electric Ind Co Ltd | Electrical contact material made of oxidized and sintered ag-sn-pb alloy |
| JPS60246511A (en) * | 1984-05-19 | 1985-12-06 | 中外電気工業株式会社 | Contact for electric breaker |
| DE3421758A1 (en) * | 1984-06-12 | 1985-12-12 | Siemens AG, 1000 Berlin und 8000 München | SINTER CONTACT MATERIAL FOR LOW VOLTAGE SWITCHGEAR IN ENERGY TECHNOLOGY AND METHOD FOR THE PRODUCTION THEREOF |
| JPS6355822A (en) * | 1986-08-26 | 1988-03-10 | 松下電工株式会社 | Contact material |
| JPS63169006A (en) * | 1987-01-06 | 1988-07-13 | Murata Mfg Co Ltd | Chip type coil |
| YU46258B (en) * | 1987-06-06 | 1993-05-28 | Degussa Ag. | APPLICATION OF SILVER IRON MATERIAL FOR ELECTRICAL CONTACTS |
| US4743718A (en) * | 1987-07-13 | 1988-05-10 | Westinghouse Electric Corp. | Electrical contacts for vacuum interrupter devices |
| JPH03504615A (en) * | 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 | Semi-finished products for electrical contacts made of silver-tin oxide composite materials and their manufacturing method using powder metallurgy |
| US4834939A (en) * | 1988-05-02 | 1989-05-30 | Hamilton Standard Controls, Inc. | Composite silver base electrical contact material |
| US4874430A (en) * | 1988-05-02 | 1989-10-17 | Hamilton Standard Controls, Inc. | Composite silver base electrical contact material |
| US4904317A (en) * | 1988-05-16 | 1990-02-27 | Technitrol, Inc. | Erosion resistant Ag-SnO2 electrical contact material |
| DE4201940A1 (en) * | 1992-01-24 | 1993-07-29 | Siemens Ag | SINTER COMPOSITE FOR ELECTRICAL CONTACTS IN SWITCHGEAR OF ENERGY TECHNOLOGY |
| US5258052A (en) * | 1992-06-18 | 1993-11-02 | Advanced Metallurgy Incorporated | Powder metallurgy silver-tin oxide electrical contact material |
| DE4331526C3 (en) * | 1992-09-16 | 2003-11-06 | Ami Doduco Gmbh | Material for electrical contacts based on silver-tin oxide or silver-zinc oxide and method for producing a composite powder therefor |
| JP3339652B2 (en) * | 1992-10-21 | 2002-10-28 | 株式会社豊田中央研究所 | Composite material and method for producing the same |
| US5796017A (en) * | 1993-08-23 | 1998-08-18 | Siemens Aktiengesellschaft | Silver-based contact material, use of such a contact material, in switchgear for power engineering applications and method of manufacturing the contact material |
| DE4331913A1 (en) * | 1993-09-20 | 1995-03-23 | Siemens Ag | Method for connecting a contact pad made of silver-metal oxide material to a metallic contact carrier |
| US5516995A (en) * | 1994-03-30 | 1996-05-14 | Eaton Corporation | Electrical contact compositions and novel manufacturing method |
| US5800932A (en) * | 1995-02-28 | 1998-09-01 | The Furukawa Electric Co., Ltd. | Electric contact material and a manufacturing method therefor |
| DE19543222C1 (en) * | 1995-11-20 | 1997-02-20 | Degussa | Silver@-iron material contg. oxide additives |
| DE19543208C1 (en) * | 1995-11-20 | 1997-02-20 | Degussa | Silver@-iron@ material contg. oxide additives |
| US6232694B1 (en) * | 1999-07-01 | 2001-05-15 | John Leslie | Starter generator with slots in the commutator head assembly |
| JP4089252B2 (en) * | 2002-03-11 | 2008-05-28 | オムロン株式会社 | DC load contact structure and switch having the structure |
| DE102009012145B4 (en) * | 2009-03-06 | 2014-02-20 | Abb Technology Ag | Process for the production of components, as well as components themselves |
| US8603366B2 (en) * | 2010-11-29 | 2013-12-10 | C.C.P. Contact Probes Co., Ltd. | Electrical contact material of silver matrix capable of resisting arc erosion and containing no cadmium-composite |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2861155A (en) * | 1956-04-20 | 1958-11-18 | Gibson Electric Company | Internally oxidized electrical contact |
| US3218135A (en) * | 1962-01-31 | 1965-11-16 | Du Pont | Powder metal compositions containing dispersed refractory oxide |
| DE1458477B2 (en) * | 1964-05-15 | 1973-05-10 | Siemens AG, 1000 Berlin u. 8000 München | METHOD FOR PRODUCING A PENETRATING COMPOSITE METAL WITH LAYERS OF DIFFERENT COMPOSITIONS FOR HEAVY DUTY ELECTRICAL CONTACTS |
| DE1303549B (en) * | 1965-06-30 | 1972-03-23 | Siemens Ag | Process for producing a sintered composite for heavy-duty electrical contacts |
| US3674446A (en) * | 1966-12-09 | 1972-07-04 | Mallory & Co Inc P R | Electrical contact material |
| US3607244A (en) * | 1967-03-11 | 1971-09-21 | Sumitomo Electric Industries | Electric contact material and method of making the same |
| US3913201A (en) * | 1968-07-05 | 1975-10-21 | Siemens Ag | Bonded material for electrical contact pieces |
| DE2147460B2 (en) * | 1971-09-23 | 1973-07-19 | PROCESS FOR MANUFACTURING SOLDERABLE SILVER-CADMIUM OXIDE MATERIALS BY INTERNAL OXIDATION OF SILVER-CADMIUM ALLOYS | |
| US3807994A (en) * | 1972-09-11 | 1974-04-30 | Texas Instruments Inc | Silver cadmium oxide electrical contact material and method of making |
| CH588152A5 (en) * | 1972-12-11 | 1977-05-31 | Siemens Ag | |
| US3930849A (en) * | 1973-05-24 | 1976-01-06 | P. R. Mallory & Co., Inc. | Electrical contact material of the ag-cdo type and method of making same |
| DE2346179A1 (en) * | 1973-09-13 | 1975-06-26 | Siemens Ag | COMPOSITE METAL AS CONTACT MATERIAL FOR VACUUM SWITCHES |
| US3989516A (en) * | 1974-04-01 | 1976-11-02 | P. R. Mallory & Co., Inc. | Method of making silver-cadmium oxide-tin oxide type contact materials |
-
1976
- 1976-12-27 DE DE2659012A patent/DE2659012C3/en not_active Expired
-
1977
- 1977-11-22 FR FR7735096A patent/FR2375705A1/en active Granted
- 1977-12-09 US US05/859,242 patent/US4204863A/en not_active Expired - Lifetime
- 1977-12-16 IN IN1742/CAL/77A patent/IN149248B/en unknown
- 1977-12-21 JP JP52154276A patent/JPS6038452B2/en not_active Expired
- 1977-12-23 CA CA000293863A patent/CA1119433A/en not_active Expired
- 1977-12-26 BR BR7708621A patent/BR7708621A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BR7708621A (en) | 1979-07-24 |
| US4204863A (en) | 1980-05-27 |
| DE2659012C3 (en) | 1980-01-24 |
| JPS5382610A (en) | 1978-07-21 |
| JPS6038452B2 (en) | 1985-08-31 |
| DE2659012B2 (en) | 1979-05-23 |
| DE2659012A1 (en) | 1978-10-12 |
| FR2375705A1 (en) | 1978-07-21 |
| IN149248B (en) | 1981-10-17 |
| FR2375705B1 (en) | 1980-06-06 |
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