CN112853235A - Composite oxide electric contact material and preparation method thereof - Google Patents
Composite oxide electric contact material and preparation method thereof Download PDFInfo
- Publication number
- CN112853235A CN112853235A CN202011638040.0A CN202011638040A CN112853235A CN 112853235 A CN112853235 A CN 112853235A CN 202011638040 A CN202011638040 A CN 202011638040A CN 112853235 A CN112853235 A CN 112853235A
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- CN
- China
- Prior art keywords
- contact material
- electric contact
- composite oxide
- mixed metal
- oxide
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
-
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
- H01H11/048—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by powder-metallurgical processes
Abstract
The invention relates to a composite oxide electric contact material and a preparation method thereof, belonging to the field of electric contact material preparation. The composite oxide electric contact material comprises the following components in percentage by weight: 5-15% of mixed metal oxide and the balance of Ag; wherein the mixed metal oxide is prepared by doping tin oxide and TiO with aluminum2The nano-fibers are prepared according to the weight ratio of 1: 0.2-0.5; in the aluminum-doped tin oxide, the content of Al is 2-6%. Compared with the traditional electric contact material, the electric contact material prepared by the inventionThe traditional Ag/SnO has longer service life, better conductivity, higher hardness and better plasticity.
Description
Technical Field
The invention relates to a composite oxide electric contact material and a preparation method thereof, belonging to the field of electric contact material preparation.
Background
The electric contact element is a core component of a high-low voltage switch electric appliance, is responsible for the operations of switching on, segmenting, guiding, isolating and the like of the electric appliance, and the performance of the electric contact element directly influences the overall reliability, stability, accuracy and service life of the conduction operations of the electric appliance, the electron and the like. The electric contact element is mainly made of electric contact materials, the electric contact materials are key factors influencing the working reliability of a contact system of the switching electric appliance, and the electric contact element has the advantages of good electric conduction, thermal conductivity, arc burning resistance, fusion welding resistance, small electric wear, low and stable contact resistance, no chemical change with a used medium, certain strength, easiness in machining and the like.
Ag/SnO2 is a common electrical contact material in the art, but Ag/SnO2In the using process, the service life is short; in addition, Ag/SnO2Has poor processability, and restricts Ag/SnO2And (5) development.
Disclosure of Invention
The invention solves the first technical problem of providing a composite oxide electric contact material with long service life.
The composite oxide electric contact material comprises the following components in percentage by weight: 5-15% of mixed metal oxide and the balance of Ag; wherein the mixed metal oxide is prepared by doping tin oxide and TiO with aluminum2The nano-fibers are prepared according to the weight ratio of 1: 0.2-0.5; in the aluminum-doped tin oxide, the content of Al is 2-6%.
In one embodiment, the composite oxide electrical contact material comprises 8-10% of mixed metal oxide and the balance of Ag.
In one embodiment, the composite oxide electrical contact material comprises 8% of mixed metal oxide and the balance of Ag.
In one embodiment, the mixed metal oxide is aluminum-doped tin oxide or TiO2The nano-fiber is prepared according to the weight ratio of 1: 0.2-0.4.
At one endIn one embodiment, the mixed metal oxide is aluminum-doped tin oxide or TiO2The nano-fiber is prepared according to the weight ratio of 1: 0.3.
The second technical problem solved by the invention is to provide a preparation method of the composite oxide electric contact material.
The preparation method of the composite oxide electric contact material comprises the following steps:
a. mixing the mixed metal oxide with Ag, and carrying out ball milling for 1-3 h;
b. c, carrying out cold isostatic pressing on the powder subjected to ball milling in the step a;
c. and sintering in a heating furnace to obtain the electric contact material.
In one embodiment, in step a, the ball milling time is 2 h.
In one embodiment, in step b, the pressure is 150 to 400 MPa.
In one embodiment, in step c, the sintering temperature is 400-950 ℃, and the sintering time is 5-6 h.
The invention has the beneficial effects that:
1. compared with the traditional Ag/SnO, the electric contact material prepared by the invention has the advantages of longer service life, better conductivity, higher hardness and better plasticity.
2. The preparation method is simple and easy to operate.
Detailed Description
The invention solves the first technical problem of providing a composite oxide electric contact material with long service life.
The composite oxide electric contact material comprises the following components in percentage by weight: 5-15% of mixed metal oxide and the balance of Ag; wherein the mixed metal oxide is prepared by doping tin oxide and TiO with aluminum2The nano-fibers are prepared according to the weight ratio of 1: 0.2-0.5; in the aluminum-doped tin oxide, the content of Al is 2-6%.
In the invention, TiO is mixed with2The nano-fiber is added into the mixed metal oxide, and the purpose is to effectively improve the electrical and thermal properties of the alloy materialThe mechanical property of gold is obviously improved, and SnO is improved2Processability of Ag material.
Wherein, the TiO is2The nanofibers can be purchased directly or made using existing techniques.
In one embodiment, the composite oxide electrical contact material comprises 8-10% of mixed metal oxide and the balance of Ag.
In one embodiment, the composite oxide electrical contact material comprises 8% of mixed metal oxide and the balance of Ag.
In one embodiment, the mixed metal oxide is aluminum-doped tin oxide or TiO2The nano-fiber is prepared according to the weight ratio of 1: 0.2-0.4.
In one embodiment, the mixed metal oxide is aluminum-doped tin oxide or TiO2The nano-fiber is prepared according to the weight ratio of 1: 0.3.
The second technical problem solved by the invention is to provide a preparation method of the composite oxide electric contact material.
The preparation method of the composite oxide electric contact material comprises the following steps:
a. mixing the mixed metal oxide with Ag, and carrying out ball milling for 1-3 h;
b. c, carrying out cold isostatic pressing on the powder subjected to ball milling in the step a;
c. and sintering in a heating furnace to obtain the electric contact material.
In one embodiment, in step a, the ball milling time is 2 h.
In one embodiment, in step b, the pressure is 150 to 400 MPa.
In one embodiment, in step c, the sintering temperature is 400-950 ℃, and the sintering time is 5-6 h.
The following examples are provided to further illustrate the embodiments of the present invention and are not intended to limit the scope of the present invention.
Examples
a. 4 percent of aluminum is doped with tin oxide and TiO2Taking the raw materials according to the weight ratio of the nanofiber to the Ag of 6.2:1.8: 92;
b. mixing the raw materials, and performing ball milling for 2 hours;
c. c, carrying out cold isostatic pressing on the powder subjected to ball milling in the step a; the pressure is 200 MPa;
c. sintering in a heating furnace at 850 ℃ for 6 h. And obtaining the electric contact material.
Comparative example
a. Taking raw materials according to the weight ratio of the tin oxide to the Ag of 8: 92;
b. mixing the raw materials, and performing ball milling for 2 hours;
c. c, carrying out cold isostatic pressing on the powder subjected to ball milling in the step a; the pressure is 200 MPa;
c. sintering in a heating furnace at 850 ℃ for 6 h. And obtaining the electric contact material.
Test examples
Tests show that the elongation of the electric contact material prepared by the method is higher, so that TiO2The addition of the nano-fibers helps to improve the plasticity of the material.
The electric contact material prepared by the invention and the electric contact material prepared by the comparative example are subjected to an electric life test, and under the same test conditions (28V, 40A), the electric contact material prepared by the invention has better life than the comparative example.
Claims (9)
1. The composite oxide electric contact material is characterized by comprising the following components in percentage by weight: 5-15% of mixed metal oxide and the balance of Ag; wherein the mixed metal oxide is prepared by doping tin oxide and TiO with aluminum2The nano-fibers are prepared according to the weight ratio of 1: 0.2-0.5; in the aluminum-doped tin oxide, the content of Al is 2-6%.
2. The composite oxide electrical contact material according to claim 1, wherein the mixed metal oxide is 8 to 10%, and the balance is Ag.
3. The composite oxide electrical contact material according to claim 1, wherein the mixed metal oxide is 8% and the balance is Ag.
4. The composite oxide electrical contact material of claim 1, wherein the mixed metal oxide is formed from aluminum-doped tin oxide, TiO2The nano-fiber is prepared according to the weight ratio of 1: 0.2-0.4.
5. The composite oxide electrical contact material of claim 1, wherein the mixed metal oxide is formed from aluminum-doped tin oxide, TiO2The nano-fiber is prepared according to the weight ratio of 1: 0.3.
6. The method for preparing a composite oxide electrical contact material according to any one of claims 1 to 5, comprising the steps of:
a. mixing the mixed metal oxide with Ag, and carrying out ball milling for 1-3 h;
b. c, carrying out cold isostatic pressing on the powder subjected to ball milling in the step a;
c. and sintering in a heating furnace to obtain the electric contact material.
7. The method for preparing a composite oxide electrical contact material according to claim 6, wherein the ball milling time in step a is 2 hours.
8. The method for preparing a composite oxide electrical contact material according to claim 6, wherein in the step b, the pressure is 150 to 400 MPa.
9. The method for preparing the composite oxide electrical contact material according to claim 6, wherein in the step c, the sintering temperature is 400-950 ℃ and the sintering time is 5-6 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011638040.0A CN112853235A (en) | 2020-12-31 | 2020-12-31 | Composite oxide electric contact material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011638040.0A CN112853235A (en) | 2020-12-31 | 2020-12-31 | Composite oxide electric contact material and preparation method thereof |
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| Publication Number | Publication Date |
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| CN112853235A true CN112853235A (en) | 2021-05-28 |
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| CN202011638040.0A Pending CN112853235A (en) | 2020-12-31 | 2020-12-31 | Composite oxide electric contact material and preparation method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6036636A (en) * | 1983-08-06 | 1985-02-25 | Chugai Electric Ind Co Ltd | Electrical contact point material consisting of silver-tin oxide alloy |
| US4695330A (en) * | 1985-08-30 | 1987-09-22 | Chugai Denki Kogyo K.K. | Method of manufacturing internal oxidized Ag-SnO system alloy contact materials |
| CN101034633A (en) * | 2006-03-08 | 2007-09-12 | 中南大学 | Electrical contact material doping AgSnO2 and its preparing method |
| CN101707156A (en) * | 2009-09-24 | 2010-05-12 | 温州宏丰电工合金有限公司 | Method for preparing Ag-ZnO-doped electrical contact material |
| CN101707157A (en) * | 2009-09-24 | 2010-05-12 | 温州宏丰电工合金有限公司 | Method for preparing Ag-SnO2-doped electrical contact material |
| CN102002651A (en) * | 2010-12-03 | 2011-04-06 | 温州宏丰电工合金股份有限公司 | Method for preparing silver-based electrical contact material with fibrous structure |
| CN102912177A (en) * | 2012-11-08 | 2013-02-06 | 哈尔滨工业大学 | TCO/Ag electric contact material |
| CN106011704A (en) * | 2016-06-24 | 2016-10-12 | 四川艾尔法泰克科技有限公司 | Silver-based hexabasic alloy electric contact material and preparation method thereof |
| CN106205762A (en) * | 2016-06-24 | 2016-12-07 | 四川艾尔法泰克科技有限公司 | Metal-based titanium oxide nanofiber composited contact material and preparation method thereof |
-
2020
- 2020-12-31 CN CN202011638040.0A patent/CN112853235A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6036636A (en) * | 1983-08-06 | 1985-02-25 | Chugai Electric Ind Co Ltd | Electrical contact point material consisting of silver-tin oxide alloy |
| US4695330A (en) * | 1985-08-30 | 1987-09-22 | Chugai Denki Kogyo K.K. | Method of manufacturing internal oxidized Ag-SnO system alloy contact materials |
| CN101034633A (en) * | 2006-03-08 | 2007-09-12 | 中南大学 | Electrical contact material doping AgSnO2 and its preparing method |
| CN101707156A (en) * | 2009-09-24 | 2010-05-12 | 温州宏丰电工合金有限公司 | Method for preparing Ag-ZnO-doped electrical contact material |
| CN101707157A (en) * | 2009-09-24 | 2010-05-12 | 温州宏丰电工合金有限公司 | Method for preparing Ag-SnO2-doped electrical contact material |
| CN102002651A (en) * | 2010-12-03 | 2011-04-06 | 温州宏丰电工合金股份有限公司 | Method for preparing silver-based electrical contact material with fibrous structure |
| CN102912177A (en) * | 2012-11-08 | 2013-02-06 | 哈尔滨工业大学 | TCO/Ag electric contact material |
| CN106011704A (en) * | 2016-06-24 | 2016-10-12 | 四川艾尔法泰克科技有限公司 | Silver-based hexabasic alloy electric contact material and preparation method thereof |
| CN106205762A (en) * | 2016-06-24 | 2016-12-07 | 四川艾尔法泰克科技有限公司 | Metal-based titanium oxide nanofiber composited contact material and preparation method thereof |
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Application publication date: 20210528 |