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Heat-conducting conductive metal paste and preparation method therefor

A conductive metal, heat-resistant technology, applied in the field of metal paste, can solve the problems of unstable conductive metal paste and poor heat resistance, and achieve the effects of low resistivity, good heat resistance, and small resistivity change

Inactive Publication Date: 2016-12-07
无锡市华东电力设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general conductive metal paste is unstable at high temperature and has poor heat resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] Example 1 A heat-resistant conductive metal paste, comprising the following raw materials in parts by weight: 20 parts of tricresyl phosphate, 12 parts of titanium dioxide, 2 parts of propylene glycol, 10 parts of trichloroethane, 1 part of fluorotrichloromethane 2 parts, 2 parts of calcium oxide, 6 parts of benzoyl peroxide, 18 parts of potassium persulfate, 20 parts of aluminum stearate.

[0009] The preparation method of the above-mentioned heat-resistant conductive metal paste comprises the following steps: mixing tricresyl phosphate, titanium dioxide, propylene glycol, trichloroethane, fluorotrichloromethane, calcium oxide, benzoyl peroxide, and potassium persulfate, Heat to 45°C for 5 minutes, then add aluminum stearate and mix well.

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Abstract

The invention discloses a heat-conducting conductive metal paste and a preparation method therefor. The heat-conducting conductive metal paste is prepared from the following raw materials in parts by weight: 20-30 parts of tricresyl phosphate, 12-16 parts of titanium dioxide, 2-15 parts of propylene glycol, 10-13 parts of trichloroethane, 1-10 parts of trichlorofluoromethane, 2-16 parts of calcium oxide, 6-10 parts of benzoyl peroxide, 18-20 parts of potassium peroxodisulfate and 20-30 parts of aluminum stearate. The conductive metal paste prepared with the method is relatively small in electrical resistivity, and the electrical resistivity is only 1.8-1.9 ohm.cm at the normal temperature; and the conductive metal paste is relatively small in electrical resistivity change under a high-temperature condition and has good conductivity and heat resistance.

Description

technical field [0001] The invention relates to a metal paste, in particular to a heat-resistant conductive metal paste and a preparation method thereof. Background technique [0002] The contact surface of the electrical connection conductor and the contact surface, no matter how smooth the processing is, they are all uneven from the perspective of the fine structure. An oxide layer is formed to make the effective contact area smaller. The zinc, nickel, chromium and other fine particles in the conductive paste are filled in the gaps of the contact surface, which is equivalent to increasing the conductive contact surface. Under the action of compression force or bolt fastening force, the metal fine particles can break the metal oxidation on the contact surface. Layer, so that the contact resistance is reduced, the temperature rise of the corresponding joint is also reduced, and the service life of the joint is prolonged. For joints of different materials, especially copper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/20H01B13/00H01R13/03
CPCH01B1/20H01B13/00H01R13/03
Inventor 丁建峰
Owner 无锡市华东电力设备有限公司
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