CA2080201C - Silver-oxide based electric contact material - Google Patents
Silver-oxide based electric contact materialInfo
- Publication number
- CA2080201C CA2080201C CA002080201A CA2080201A CA2080201C CA 2080201 C CA2080201 C CA 2080201C CA 002080201 A CA002080201 A CA 002080201A CA 2080201 A CA2080201 A CA 2080201A CA 2080201 C CA2080201 C CA 2080201C
- Authority
- CA
- Canada
- Prior art keywords
- silver
- resistance
- oxide based
- oxidation treatment
- electric contacts
- 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
Links
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
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
- H01B1/08—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances 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
- 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
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)
Abstract
A silver-oxide based material for electric contacts, which has excellent deposition resistance and consumption resistance. The material is formed by subjecting to an internal oxidation treatment an Ag based alloy consisting essentially of:
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te: 0.1 - 0.8%; and Ag and inevitable impurities: the balance. If required, at least one of the following elements may be added:
(a) at least one element selected from the group consisting of Fe, Ni, and Co: 0.05 - 0.2%; and (b) Cd: 0.1 - 1%.
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te: 0.1 - 0.8%; and Ag and inevitable impurities: the balance. If required, at least one of the following elements may be added:
(a) at least one element selected from the group consisting of Fe, Ni, and Co: 0.05 - 0.2%; and (b) Cd: 0.1 - 1%.
Description
, TITLE OF THE INVENTION
SILVER-OXIDE BASED ELECTRIC
CONTACT MATERIAL
BACKGROUND OF THE INVENTION
(Field of the Invention) This invention relates to silver-oxide based materials for electric contacts for use in various electrical or electronic apparatus.
(Prior Art) Conventionally, a great many electrical contact materials have been proposed or used in vàrious electrical or electronic apparatus. Among widely used electric contact materials, there is known, e.g. from Japanese Patent Publication (Kokoku) No. 55-4825 an electric contact material which is formed by subjecting an Ag based alloy consisting essentially of, in weight % (hereinafter the percentage is weight %), 5 - 10% Sn, and 1 - 6% In, and, if required, 0.01 - 0.5% at least one element selected from the group consisting of Fe, Ni, and Co, and the balance of Ag and inevitable impurities, to an internal oxidation treatment in which the Ag based alloy is soaked in an oxidizing atmosphere at a temperature of 650 to 750C for a predetermined time period.
In recent years, there has been made a remarkable -progress in the development of electrical and electronic apparatus having improved performance and prolonged service lives. Accordingly, there is an increasing demand for materials for electric contacts for use in these electrical and electronic apparatus, which have improved deposition resistance and consumption resistance. However, in actuality, conventional electric contact materials inclusive of the above-mentioned known electric contact material do not have sufficient deposition resistance and consumption resistance to satisfy requirements imposed by recently developed electrical and electronic apparatus.
SUMMARY OF THE INVENTION
It is, therefore, the object of the invention to provide silver-oxide based materials for electric contacts, which have excellent deposition resistance and consumption resistance and hence prolonged service lives.
To attain the above object, the present invention provides a silver-oxide based material for electric contacts, having excellent deposition resistance and consumption resistance, the material being formed by subjecting to an internal oxidation treatment an Ag based alloy consisting essentially of:
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%; ~
Te: 0.1 - 0.8%; and Ag and inevitable impurities: the balance.
If required, at least one of the following elements (a) and (b) may be added:
(a) at least one element selected from the group -consisting of Fe, Ni, and Co: 0.05 - 0.2%; and o . I
(b) Cd: ~.01 - 1%.
The above and other objects, features, and advantages of the invention will become more apparent from the following detailed description.
2o8o2o ' DETAILED DESCRIPTION
Under the above stated circumstances, the present inventors have made many studies in order to obtain silver oxide based electric contact materials having improved deposition resistance and consumption resistance, and reached the following finding.
A silver-oxide based material for electric contacts, which is formed by subjecting an Ag based alloy consisting essentially of:
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te: 0.1 - 0.8%;
and, if required, at least one of the following elements (a) and (b):
(a) at least one element selected from the group consisting of Fe, Ni, and Co: 0.05 - 0.2%; and (b) Cd. 0.1 - 1%; and Ag and inevitable impurities: the balance, to an internal oxidation treatment under the above-mentioned conditions, i.e.:
Atmosphere: Oxidizing atmosphere;
Oxidizing Temperature: 650 - 750C; and Soaking Time: 8 - 26hr, has by far more excellent deposition resistance and consumption resistance as compared with the aforementioned known silver-oxide based electric contact material.
- The present invention is based upon the above finding, and the silver-oxide based electric contact material according to the invention has the aforementioned chemical compositions.
The reasons for specifying as above the contents 20~0~ ~
of the component elements of the Ag based alloy before being subjected to the internal oxidation treatment will now be described:
(a~ Sn:
The Sn forms oxides in the alloy, which act to enhance the deposition resistance. However, if the Sn content is less than 5.1%, desired excellent deposition resistance cannot be obtained, whereas if the Sn content exceeds 8.5%, the contact resistance of the resulting electric contacts is apt to increase, and further the silver-oxide based material will have lowered workability in manufacturing electric contacts therefrom. Therefore, the Sn content should be limited to a range of 5.1 to 8.5%.
(b) In:
The In acts to promote oxidation of the Sn component, and also the In itself forms oxides which act to enhance the deposition resistance and consumption resistance. However. if the In content is less than 1.5%, the above actions cannot bring about remarkably improved results, whereas if the In content exceeds 3.5%, the resulting electric contact material is apt to have lowered deposition resistance.
Therefore, the In content~ should be limited to a range of 1.5 to 3.5%.
(c) Te:
The Te forms oxides which can easily sublime upon generation of an arc due to closure or opening of the electric contacts to thereby further enhance the deposition resistance and consumption resistance However, if the Te content is less than 0.1%. the above action cannot bring about remarkably improved results, while if the Te content is in excess of 0.8%, the resulting contact material is apt to have lowered 2080~ ~
workability. Therefore, the Te content should be limited to a range of 0.1 to 0.8%.
(d) Fe, Ni, and Co:
On$ or more of these elements may be added according to necessity. If added, they dissolve in the matrix to finely divide the oxides and the Ag grains to thereby improve the deposition resistance. However, if the total content of these elements is below 0.05%, the above action cannot bring about remarkably improved results, whereas if the total content exceeds 0.2%, the workability can lower. Therefore the total content of Fe, Ni, and Co should be limited a range of 0.05 to 0.2%.
(e) Cd:
Cd may be added if required, since the Cd cooperates with the Te to further enhance the deposition resistance. If the Cd content is less than 0.1%, desired excellent deposition resistance cannot be obtained, whereas in excess of 1%, the consumption resistance is apt to lower. Thus, the Cd content should be limited to a range of 0.1 to 1%.
Next, examples of silver-oxide based electric contact materials according to the invention will be described.
Example 1 Ag based alloys having chemical compositions shown in Tables 1 and 2 were smelted in an ordinary type high-frequency smelting furnance and cast under conventional ordinary casting conditions into ingots.
The ingots were each hot extruded into a plate having a thickness of 5mm. The plate was then hot rolled, followed by being cold rolled into a sheet having a thickness of 0.6mm. The sheet was cut or sliced in its longitudinal direction into a strip having a width of 2mm. The strip was subjected to an internal oxidation treatment under an oxygen atmosphere at a temperature of 700C and for a soaking time of 24 hours. The internally oxidized strips were put together and compacted into a billet having a diameter of 70mm. The billet was extruded into a diameter of 7mm, followed by being subjected to wire drawing into a wire having a diameter of 2mm. Finally, the wire was formed, by a header machine, into rivets having a head diameter of 4mm, a head height of lmm, a leg diameter of 2mm, and a leg length of 2mm. The obtained rivets were used as specimens of the silver-oxide based electric contact material according to the present invention (hereinafter referred to as "the present invention contact materials Nos. 1 - 13") and specimens of conventional silver-oxide based electric contact materials (hereinàfter referred to as "the conventional contact materials Nos. 1 - 11").
Then, electrical tests were conducted on the present invention contact materials Nos. 1 - 13 and the conventional contact materials Nos. 1 - 11 by the use of an electric contact testing machine according to ASTM under the following.conditions to examine the number of times of deposition and the amount of consumption in order to evaluate the deposition resistance and the consumption resistance:
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~n 208~20 1 DC Voltage : 14V;
Making Current : 150A;
Breaking Current : 30A;
Switching Time : ON for 1 sec. - OFF for 9sec.;
Contact Force : 80g;
Opening Force : 80g;
Number of Times of Switchings : 10,000 The results of the tests are shown in Tables 1 and 2.
Example 2 Rivets were formed from Ag based alloys having chemical compositions shown in Tables 3 and 4 under the same conditions as in Example 1 described above to obtain present invention materials Nos. 14 - 29 and conventional materials Nos. 12 - 17.
Then, electrical tests were conducted on the present invention contact materials Nos. 14 - 29 and the conventional contact materials Nos. 12 - 17 by the use of an electric contact testing machine according to ASTM under the following conditions to ex~m-ne the number of times of deposition and the amount of consumption in order to evaluate the deposition resistance and the consumption resistance:
DC Voltage :24V;
Making Current :100A;
Breaking Current : 20A;
Switching Time :ON for 1 sec. - OFF for 9 sec.;
Contact Force :100g;
Opening Force :100g;
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'~" NO~ T NAANT LN:aS~a ~NOT,T N~ilANQ~) Number of Times of Switchings : 5,000 The results of the tests are shown in Tables 3 and 4.
It will be learned from Tables 1 to 4 that the present invention contact materials Nos. 1 - 29 all show by far more excellent deposition resistance and consumption resistance than the conventional contact materials Nos. 1 - 17.
Since silver-oxide based electric contact materials according to the present invention thus possess excellent deposition resistance and consumption resistance, if they are actually used in various electrical or electronic apparatus, they will greatly contribute to improving the performance of the electrical or electronic apparatus as well as to Prolongation of the service lives thereof.
SILVER-OXIDE BASED ELECTRIC
CONTACT MATERIAL
BACKGROUND OF THE INVENTION
(Field of the Invention) This invention relates to silver-oxide based materials for electric contacts for use in various electrical or electronic apparatus.
(Prior Art) Conventionally, a great many electrical contact materials have been proposed or used in vàrious electrical or electronic apparatus. Among widely used electric contact materials, there is known, e.g. from Japanese Patent Publication (Kokoku) No. 55-4825 an electric contact material which is formed by subjecting an Ag based alloy consisting essentially of, in weight % (hereinafter the percentage is weight %), 5 - 10% Sn, and 1 - 6% In, and, if required, 0.01 - 0.5% at least one element selected from the group consisting of Fe, Ni, and Co, and the balance of Ag and inevitable impurities, to an internal oxidation treatment in which the Ag based alloy is soaked in an oxidizing atmosphere at a temperature of 650 to 750C for a predetermined time period.
In recent years, there has been made a remarkable -progress in the development of electrical and electronic apparatus having improved performance and prolonged service lives. Accordingly, there is an increasing demand for materials for electric contacts for use in these electrical and electronic apparatus, which have improved deposition resistance and consumption resistance. However, in actuality, conventional electric contact materials inclusive of the above-mentioned known electric contact material do not have sufficient deposition resistance and consumption resistance to satisfy requirements imposed by recently developed electrical and electronic apparatus.
SUMMARY OF THE INVENTION
It is, therefore, the object of the invention to provide silver-oxide based materials for electric contacts, which have excellent deposition resistance and consumption resistance and hence prolonged service lives.
To attain the above object, the present invention provides a silver-oxide based material for electric contacts, having excellent deposition resistance and consumption resistance, the material being formed by subjecting to an internal oxidation treatment an Ag based alloy consisting essentially of:
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%; ~
Te: 0.1 - 0.8%; and Ag and inevitable impurities: the balance.
If required, at least one of the following elements (a) and (b) may be added:
(a) at least one element selected from the group -consisting of Fe, Ni, and Co: 0.05 - 0.2%; and o . I
(b) Cd: ~.01 - 1%.
The above and other objects, features, and advantages of the invention will become more apparent from the following detailed description.
2o8o2o ' DETAILED DESCRIPTION
Under the above stated circumstances, the present inventors have made many studies in order to obtain silver oxide based electric contact materials having improved deposition resistance and consumption resistance, and reached the following finding.
A silver-oxide based material for electric contacts, which is formed by subjecting an Ag based alloy consisting essentially of:
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te: 0.1 - 0.8%;
and, if required, at least one of the following elements (a) and (b):
(a) at least one element selected from the group consisting of Fe, Ni, and Co: 0.05 - 0.2%; and (b) Cd. 0.1 - 1%; and Ag and inevitable impurities: the balance, to an internal oxidation treatment under the above-mentioned conditions, i.e.:
Atmosphere: Oxidizing atmosphere;
Oxidizing Temperature: 650 - 750C; and Soaking Time: 8 - 26hr, has by far more excellent deposition resistance and consumption resistance as compared with the aforementioned known silver-oxide based electric contact material.
- The present invention is based upon the above finding, and the silver-oxide based electric contact material according to the invention has the aforementioned chemical compositions.
The reasons for specifying as above the contents 20~0~ ~
of the component elements of the Ag based alloy before being subjected to the internal oxidation treatment will now be described:
(a~ Sn:
The Sn forms oxides in the alloy, which act to enhance the deposition resistance. However, if the Sn content is less than 5.1%, desired excellent deposition resistance cannot be obtained, whereas if the Sn content exceeds 8.5%, the contact resistance of the resulting electric contacts is apt to increase, and further the silver-oxide based material will have lowered workability in manufacturing electric contacts therefrom. Therefore, the Sn content should be limited to a range of 5.1 to 8.5%.
(b) In:
The In acts to promote oxidation of the Sn component, and also the In itself forms oxides which act to enhance the deposition resistance and consumption resistance. However. if the In content is less than 1.5%, the above actions cannot bring about remarkably improved results, whereas if the In content exceeds 3.5%, the resulting electric contact material is apt to have lowered deposition resistance.
Therefore, the In content~ should be limited to a range of 1.5 to 3.5%.
(c) Te:
The Te forms oxides which can easily sublime upon generation of an arc due to closure or opening of the electric contacts to thereby further enhance the deposition resistance and consumption resistance However, if the Te content is less than 0.1%. the above action cannot bring about remarkably improved results, while if the Te content is in excess of 0.8%, the resulting contact material is apt to have lowered 2080~ ~
workability. Therefore, the Te content should be limited to a range of 0.1 to 0.8%.
(d) Fe, Ni, and Co:
On$ or more of these elements may be added according to necessity. If added, they dissolve in the matrix to finely divide the oxides and the Ag grains to thereby improve the deposition resistance. However, if the total content of these elements is below 0.05%, the above action cannot bring about remarkably improved results, whereas if the total content exceeds 0.2%, the workability can lower. Therefore the total content of Fe, Ni, and Co should be limited a range of 0.05 to 0.2%.
(e) Cd:
Cd may be added if required, since the Cd cooperates with the Te to further enhance the deposition resistance. If the Cd content is less than 0.1%, desired excellent deposition resistance cannot be obtained, whereas in excess of 1%, the consumption resistance is apt to lower. Thus, the Cd content should be limited to a range of 0.1 to 1%.
Next, examples of silver-oxide based electric contact materials according to the invention will be described.
Example 1 Ag based alloys having chemical compositions shown in Tables 1 and 2 were smelted in an ordinary type high-frequency smelting furnance and cast under conventional ordinary casting conditions into ingots.
The ingots were each hot extruded into a plate having a thickness of 5mm. The plate was then hot rolled, followed by being cold rolled into a sheet having a thickness of 0.6mm. The sheet was cut or sliced in its longitudinal direction into a strip having a width of 2mm. The strip was subjected to an internal oxidation treatment under an oxygen atmosphere at a temperature of 700C and for a soaking time of 24 hours. The internally oxidized strips were put together and compacted into a billet having a diameter of 70mm. The billet was extruded into a diameter of 7mm, followed by being subjected to wire drawing into a wire having a diameter of 2mm. Finally, the wire was formed, by a header machine, into rivets having a head diameter of 4mm, a head height of lmm, a leg diameter of 2mm, and a leg length of 2mm. The obtained rivets were used as specimens of the silver-oxide based electric contact material according to the present invention (hereinafter referred to as "the present invention contact materials Nos. 1 - 13") and specimens of conventional silver-oxide based electric contact materials (hereinàfter referred to as "the conventional contact materials Nos. 1 - 11").
Then, electrical tests were conducted on the present invention contact materials Nos. 1 - 13 and the conventional contact materials Nos. 1 - 11 by the use of an electric contact testing machine according to ASTM under the following.conditions to examine the number of times of deposition and the amount of consumption in order to evaluate the deposition resistance and the consumption resistance:
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O E--~: -- ~C~o~,~o----oo_ cn v~
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~n 208~20 1 DC Voltage : 14V;
Making Current : 150A;
Breaking Current : 30A;
Switching Time : ON for 1 sec. - OFF for 9sec.;
Contact Force : 80g;
Opening Force : 80g;
Number of Times of Switchings : 10,000 The results of the tests are shown in Tables 1 and 2.
Example 2 Rivets were formed from Ag based alloys having chemical compositions shown in Tables 3 and 4 under the same conditions as in Example 1 described above to obtain present invention materials Nos. 14 - 29 and conventional materials Nos. 12 - 17.
Then, electrical tests were conducted on the present invention contact materials Nos. 14 - 29 and the conventional contact materials Nos. 12 - 17 by the use of an electric contact testing machine according to ASTM under the following conditions to ex~m-ne the number of times of deposition and the amount of consumption in order to evaluate the deposition resistance and the consumption resistance:
DC Voltage :24V;
Making Current :100A;
Breaking Current : 20A;
Switching Time :ON for 1 sec. - OFF for 9 sec.;
Contact Force :100g;
Opening Force :100g;
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'~" NO~ T NAANT LN:aS~a ~NOT,T N~ilANQ~) Number of Times of Switchings : 5,000 The results of the tests are shown in Tables 3 and 4.
It will be learned from Tables 1 to 4 that the present invention contact materials Nos. 1 - 29 all show by far more excellent deposition resistance and consumption resistance than the conventional contact materials Nos. 1 - 17.
Since silver-oxide based electric contact materials according to the present invention thus possess excellent deposition resistance and consumption resistance, if they are actually used in various electrical or electronic apparatus, they will greatly contribute to improving the performance of the electrical or electronic apparatus as well as to Prolongation of the service lives thereof.
Claims (8)
1. A silver-oxide based material for electric contacts, having excellent deposition resistance and consumption resistance, said material being formed by subjecting to an internal oxidation treatment an Ag based alloy consisting essentially of:
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te: 0.1 - 0.8%; and Ag and inevitable impurities: the balance.
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te: 0.1 - 0.8%; and Ag and inevitable impurities: the balance.
2. A silver-oxide based material for electric contacts, having excellent deposition resistance and consumption resistance, said material being formed by subjecting to an internal oxidation treatment an Ag based alloy consisting essentially of:
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te: 0.1 - 0.8%; and at least one element selected from the group consisting of Fe, Ni, and Co: 0.05 - 0.2%; and Ag and inevitable impurities: the balance.
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te: 0.1 - 0.8%; and at least one element selected from the group consisting of Fe, Ni, and Co: 0.05 - 0.2%; and Ag and inevitable impurities: the balance.
3. A silver-oxide based material for electric contacts, having excellent deposition resistance and consumption resistance, said material being formed by subjecting to an internal oxidation treatment an Ag based alloy consisting essentially of:
Sn: 5.1 - 8.5%, In: 1.5 - 3.5%.
Te: 0.1 - 0.8%;
Cd: 0.1 - 1%: and Ag and inevitable impurities: the balance.
Sn: 5.1 - 8.5%, In: 1.5 - 3.5%.
Te: 0.1 - 0.8%;
Cd: 0.1 - 1%: and Ag and inevitable impurities: the balance.
4. A silver-oxide based material for electric contacts, having excellent deposition resistance and consumption resistance, the material being formed by subjecting to an internal oxidation treatment an Ag based alloy consisting essentially of:
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te. 0.1 - 0.8%;
Cd: 0.1 - 1%;
at least one element selected from the group consisting of Fe, Ni, and Co: 0.05 - 0.2%; and Ag and inevitable impurities, the balance.
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te. 0.1 - 0.8%;
Cd: 0.1 - 1%;
at least one element selected from the group consisting of Fe, Ni, and Co: 0.05 - 0.2%; and Ag and inevitable impurities, the balance.
5. A silver-oxide based material for electric contacts, as claimed in any one of claims 1 - 4, wherein the internal oxidation treatment is carried out under the following conditions:
Atmosphere : Oxidizing atmosphere.
Oxidizing Temperature : 650 - 750°C; and Soaking Time . 8 - 26hr.
Atmosphere : Oxidizing atmosphere.
Oxidizing Temperature : 650 - 750°C; and Soaking Time . 8 - 26hr.
6. A silver-oxide based material for electric contacts, having excellent deposition resistance and consumption resistance, the material being formed by subjecting to an internal oxidation treatment an Ag based alloy consisting essentially of:
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te: 0.1 - 0.8%;
at least one element related from the group consisting of Fe, Ni and Co: 0 or 0.05 - 0.2%; and Cd. 0 or 0.1 - 1%; and Ag and inevitable impurities: the balance.
Sn: 5.1 - 8.5%;
In: 1.5 - 3.5%;
Te: 0.1 - 0.8%;
at least one element related from the group consisting of Fe, Ni and Co: 0 or 0.05 - 0.2%; and Cd. 0 or 0.1 - 1%; and Ag and inevitable impurities: the balance.
7. A silver-oxide based material according to any one of claims 1 to 4 or claim 6, which is in the form of a rivet.
8. A silver-oxide based material according to any one of claims 1 to 4, wherein the Ag based alloy contains Te: 0.31 -0.79%.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3122024A JPH0762188B2 (en) | 1991-04-12 | 1991-04-12 | Silver-oxide type electrical contact material |
| DE69219397T DE69219397T2 (en) | 1991-04-12 | 1992-02-05 | Silver-based metal oxide material for electrical contacts |
| EP92101915A EP0508055B1 (en) | 1991-04-12 | 1992-02-05 | Silver-base metal oxide material for electrical contacts |
| KR1019920005853A KR0121724B1 (en) | 1991-04-12 | 1992-04-08 | Silver-oxide based electric contact material |
| CA002080201A CA2080201C (en) | 1991-04-12 | 1992-10-08 | Silver-oxide based electric contact material |
| US08/224,430 US5451272A (en) | 1991-04-12 | 1994-04-08 | Silver-oxide electric contact material for use in switches for high current |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3122024A JPH0762188B2 (en) | 1991-04-12 | 1991-04-12 | Silver-oxide type electrical contact material |
| CA002080201A CA2080201C (en) | 1991-04-12 | 1992-10-08 | Silver-oxide based electric contact material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2080201A1 CA2080201A1 (en) | 1994-04-09 |
| CA2080201C true CA2080201C (en) | 1996-11-12 |
Family
ID=25675579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002080201A Expired - Lifetime CA2080201C (en) | 1991-04-12 | 1992-10-08 | Silver-oxide based electric contact material |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0762188B2 (en) |
| CA (1) | CA2080201C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5451272A (en) * | 1991-04-12 | 1995-09-19 | Mitsubishi Materials Corporation | Silver-oxide electric contact material for use in switches for high current |
| DE602004020844D1 (en) | 2003-08-08 | 2009-06-10 | Mitsubishi Materials C M I Corp | A method of making an electrical contact of high electrical conductivity for an electromagnetic relay and electrical contact therewith |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5233067A (en) * | 1975-09-10 | 1977-03-12 | Tokyo Shibaura Electric Co | Elecric contact material |
| JPS554825A (en) * | 1978-06-26 | 1980-01-14 | Seiko Epson Corp | Cell timepiece |
| JPS555583A (en) * | 1978-06-29 | 1980-01-16 | Omron Tateisi Electronics Co | Numeral set system |
| JPS58110639A (en) * | 1981-12-23 | 1983-07-01 | Tanaka Kikinzoku Kogyo Kk | Sliding contact material |
-
1991
- 1991-04-12 JP JP3122024A patent/JPH0762188B2/en not_active Expired - Lifetime
-
1992
- 1992-10-08 CA CA002080201A patent/CA2080201C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0762188B2 (en) | 1995-07-05 |
| CA2080201A1 (en) | 1994-04-09 |
| JPH04314837A (en) | 1992-11-06 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |