CN106057506A - Adding material for electrical contact surface coating and electrical contact manufacturing method - Google Patents
Adding material for electrical contact surface coating and electrical contact manufacturing method Download PDFInfo
- Publication number
- CN106057506A CN106057506A CN201610571251.4A CN201610571251A CN106057506A CN 106057506 A CN106057506 A CN 106057506A CN 201610571251 A CN201610571251 A CN 201610571251A CN 106057506 A CN106057506 A CN 106057506A
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- China
- Prior art keywords
- electrical contact
- accounting
- powder body
- mixed oxide
- cswo
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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
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/64—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of silver
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Contacts (AREA)
Abstract
The invention discloses an adding material for an electrical contact surface coating and an electrical contact manufacturing method. The adding material is mixed oxide powder formed by Sb-doped SnO2, Sn-doped In2O3 and CsWO3. The electrical contact manufacturing method comprises steps: a proper amount of dispersant is added to the adding material, and ball milling is carried out with purified water as a medium to obtain a suspension; and then, the suspension is added to a silver-containing electroplating solution, and a metal electrical contact base body is coated with a layer of silver-oxide surface coating in the above composite electroplating solution. The electrical contact (sheet) manufactured by adopting the method of the invention has high arc striking (good arc erosion resistance) and temperature rise restraining abilities.
Description
Technical field
The present invention relates to material and devices field, be specifically related to a kind of interpolation material for electrical contact overlay coating and electricity
Contact manufacture method.
Background technology
Electrical contact is the contact element of electric switch, instrument and meter etc., mainly bears on-off circuit and load electricity
The task of stream, its performance directly affects the reliability service of device for switching.Currently used most electrical contact material is money base
Composite, wherein has the composite such as silver-cadmium oxide, silver-tin.The electrical contact that silver-cadmium oxide composite makes exists
Harmful cadmium steam can be volatilized during use, do not meet the demand for development of environmental protection.Silver-tin electrical contact
Having two kinds of (class) manufacture methods, one is to use powder metallurgic method, alloy inner oxidation legal system to make electrical contact entirety, and this method exists material
Material processing and forming difficulty is big, complex manufacturing, manufacturing cost are higher.Another kind of (class) is to use electroplating technology at electrical contact base
One layer of silver-tin layer containing stannum oxide is prepared in surface, as the contact surface of electrical contact, such as Chinese patent
2008103026756.Although this method can overcome the defect that first method exists, but in practice, on the one hand there is also absolutely
The stannum oxide powder body of edge is difficult to be incorporated in silver layer, and is difficult to be uniformly distributed；On the other hand, silver-tin coating after testing
During switch repeatedly, the rejection ability of air exercise arc (arc erosion) and temperature rise is not enough.
Summary of the invention
The deficiency existed for prior art, the present invention provides a kind of interpolation material for electrical contact overlay coating and electricity
Contact manufacture method.Described interpolation material is to be adulterated SnO by Sb2, Sn adulterates In2O3、CsWO3The mixed oxide powder body of composition,
Mixed oxide powder body granularity 5nm-100nm, wherein Sb doping SnO2Accounting be 5-20wt%, Sn adulterate In2O3Accounting be
5-20wt%, CsWO3Accounting be 60-90wt%.The dispersant of accounting 0.2-1.5wt% is added in this interpolation material, with
Pure water is ball-milling medium, and it is the suspension of 5-35wt% that ball milling obtains mixed oxide powder body granule accounting；Then by suspension
Joining in the electroplate liquid of argentiferous, obtain composite plating solution, in composite plating solution, the content of mixed oxide powder body granule is
0.5g/L-20g/L, uses existing electroplating technology that metal electrical contact matrix plates in above-mentioned composite plating solution layer of surface plating
Layer (silver-oxides coating), thickness of coating determines according to available data, can be prepared by finished product electrical contact.Foundation practical situation,
Plating intermediate deposit can be added between metal electrical contact matrix and silver-oxides coating.
The present invention can obtain following effect: due to Sb doping SnO2With Sn doping In2O3Powder body is all the material of weakly conducting
Material, is usually used in antistatic coating etc.；And wolframic acid caesium (CsWO3) it is the novel heat insulation material being the most just found, have preferably
Electric conductivity；In conjunction with the good characteristic of three kinds of oxide powders, improve electrical contact overlay coating and beat arc (anti electric arc corrosion)
Rejection ability (suppression temperature rise) with temperature rise.
Detailed description of the invention
Embodiment 1:
With the center granularity (D50) the Sb doping SnO as 67nm2Powder body, the Sn doping In of 26nm2O3Powder body and 89nm's
CsWO3Powder body is raw material；Sb adulterates SnO2Powder content x=0.05, Sn adulterate In2O3Powder content y=0.2, CsWO3Powder body contains
Amount z=0.75；Powder body gross mass is 200g, adds the A40 dispersant of 0.2%, and the pure water of 1800g, suspension solid content is
10%, ball milling 4h obtain suspension.In electroplate liquid, the content of oxide powder is 2g/L.Bath element: silver potassium cyanide 80g/L,
Potassium pyrophosphate 70g/L, potassium cyanide 46g/L.Electroplating technological parameter: bath temperature 30 DEG C, electric current 1.5A/dm2, control plating gained
Composite bed thickness be 50 μm.After testing, the electric contact point after making, by rated current 16A, rated voltage 250V, break-make time
Number is more than 50000 times, and temperature rise is less than 9 DEG C.
Embodiment 2:
With the center granularity (D50) the Sb doping SnO as 67nm2Powder body, the Sn doping In of 26nm2O3Powder body and 89nm's
CsWO3Powder body is raw material.Sb adulterates SnO2Powder content x=0.2, Sn adulterate In2O3Powder content y=0.05, CsWO3Powder body contains
Amount z=0.75；Powder body gross mass is 200g, adds the BYK dispersant of 1.5%, and the pure water of 1400g, suspension solid content is
30%, ball milling 7h obtain suspension.In electroplate liquid, the content of oxide powder is 17g/L.Bath element: silver potassium cyanide 80g/L,
Potassium pyrophosphate 70g/L, potassium cyanide 46g/L.Electroplating technological parameter: bath temperature 30 DEG C, electric current 1.5A/dm2, control plating gained
Composite bed thickness be 68 μm.After testing, the electrical contact after making, by rated current 16A, rated voltage 250V, break-make time
Number is more than 50000 times, and temperature rise is less than 12 DEG C.
Embodiment 3:
With the center granularity (D50) the Sb doping SnO as 67nm2Powder body, the Sn doping In of 26nm2O3Powder body and 89nm's
CsWO3Powder body is raw material；Sb adulterates SnO2Powder content x=0.05, Sn adulterate In2O3Powder content y=0.05, CsWO3Powder body
Content z=0.9；Powder body gross mass is 200g, adds the A40 dispersant of 0.5%, and the pure water of 1800g, suspension solid content is
10%, ball milling 4h obtain suspension.In electroplate liquid, the content of oxide powder is 2g/L.Bath element: silver potassium cyanide 80g/L,
Potassium pyrophosphate 70g/L, potassium cyanide 46g/L.Electroplating technological parameter: bath temperature 30 DEG C, electric current 1.5A/dm2, control plating gained
Composite bed thickness be 50 μm.After testing, the electrical contact after making, by rated current 16A, rated voltage 250V, break-make time
Number is more than 50000 times, and temperature rise is less than 12 DEG C.
Embodiment 4:
With the center granularity (D50) the Sb doping SnO as 67nm2Powder body, the Sn doping In of 26nm2O3Powder body and 89nm's
CsWO3Powder body is raw material.Sb adulterates SnO2Powder content x=0.2, Sn adulterate In2O3Powder content y=0.2, CsWO3Powder body contains
Amount z=0.6；Powder body gross mass is 200g, adds the BYK dispersant of 1.0%, and the pure water of 1400g, suspension solid content is
30%, ball milling 7h obtain suspension.In electroplate liquid, the content of oxide powder is 17g/L.Bath element: silver potassium cyanide 80g/L,
Potassium pyrophosphate 70g/L, potassium cyanide 46g/L.Electroplating technological parameter: bath temperature 30 DEG C, electric current 1.5A/dm2, control plating gained
Composite bed thickness be 68 μm.After testing, the electric contact point after making, by rated current 16A, rated voltage 250V, break-make time
Number is more than 50000 times, and temperature rise is less than 10 DEG C.
Claims (3)
1., for the interpolation material of electrical contact overlay coating, described interpolation material is to be adulterated SnO by Sb2, Sn adulterates In2O3、
CsWO3The mixed oxide powder body of composition, mixed oxide powder body granularity 5nm-100nm, wherein Sb doping SnO2Accounting be 5-
20wt%, Sn adulterate In2O3Accounting be 5-20wt%, CsWO3Accounting be 60-90wt%.
2. an electrical contact, described electrical contact mainly by metallic matrix with plating in the coating material group of metallic matrix outer surface
Become, it is characterised in that: described coating material at least contains Sb doping SnO2, Sn adulterates In2O3、CsWO3The mixed oxide of composition
Powder body, mixed oxide powder body granularity 5nm-100nm, wherein Sb doping SnO2Accounting be 5-20wt%, Sn adulterate In2O3's
Accounting is 5-20wt%, CsWO3Accounting be 60-90wt%.
3. a manufacture method for electrical contact, described method includes:
(1) material adds adding described in claim 1 dispersant of accounting 0.2-1.5wt%, is situated between for ball milling with pure water
Matter, it is the suspension of 5-35wt% that ball milling obtains mixed oxide powder body granule accounting；Then suspension is joined argentiferous
In electroplate liquid, obtaining composite plating solution, in composite plating solution, the content of mixed oxide powder body granule is 0.5g/L-20g/L；
(2) metal electrical contact matrix is electroplated in above-mentioned composite plating solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610571251.4A CN106057506A (en) | 2016-07-19 | 2016-07-19 | Adding material for electrical contact surface coating and electrical contact manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610571251.4A CN106057506A (en) | 2016-07-19 | 2016-07-19 | Adding material for electrical contact surface coating and electrical contact manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106057506A true CN106057506A (en) | 2016-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610571251.4A Pending CN106057506A (en) | 2016-07-19 | 2016-07-19 | Adding material for electrical contact surface coating and electrical contact manufacturing method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425789A (en) * | 2003-01-06 | 2003-06-25 | 王乃千 | Siver-tin indium composite oxide as electric contact material and its its preparing process |
| CN1425782A (en) * | 2003-01-14 | 2003-06-25 | 天津大学 | Metal oxide blended silver-tin dioxide electric contactor material and its preparing method |
| CN101320642A (en) * | 2008-07-10 | 2008-12-10 | 柳州市建益电工材料有限公司 | Production method of electric contact point |
| CN102320662A (en) * | 2011-07-04 | 2012-01-18 | 大连工业大学 | Cesium tungsten bronze powder and preparation method thereof |
| CN102394184A (en) * | 2011-08-15 | 2012-03-28 | 宁波福特继电器有限公司 | Contact of relay |
| CN102864365A (en) * | 2012-09-12 | 2013-01-09 | 宁波汉博贵金属合金有限公司 | Composite silver stannic oxide electric contact material and preparation method thereof |
-
2016
- 2016-07-19 CN CN201610571251.4A patent/CN106057506A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425789A (en) * | 2003-01-06 | 2003-06-25 | 王乃千 | Siver-tin indium composite oxide as electric contact material and its its preparing process |
| CN1425782A (en) * | 2003-01-14 | 2003-06-25 | 天津大学 | Metal oxide blended silver-tin dioxide electric contactor material and its preparing method |
| CN101320642A (en) * | 2008-07-10 | 2008-12-10 | 柳州市建益电工材料有限公司 | Production method of electric contact point |
| CN102320662A (en) * | 2011-07-04 | 2012-01-18 | 大连工业大学 | Cesium tungsten bronze powder and preparation method thereof |
| CN102394184A (en) * | 2011-08-15 | 2012-03-28 | 宁波福特继电器有限公司 | Contact of relay |
| CN102864365A (en) * | 2012-09-12 | 2013-01-09 | 宁波汉博贵金属合金有限公司 | Composite silver stannic oxide electric contact material and preparation method thereof |
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Application publication date: 20161026 |