Composite contact material and preparation method thereof

Abstract

The invention provides a composite contact material and a preparation method thereof. The preparation method includes the following steps: (1) mixing and stirring silver powder, copper powder, aluminum powder, titanium monoxide, stannic oxide, copper(II) oxide, and boronnitride; (2) adding N,N-Ethylene Bis-stearamide, glycerol triStearate, and zinc stearate, putting the mixture into a high-energy ball grinding mill to perform ball grinding, wherein the ratio of ball to material is 10: 1-5: 1; (3) removing large particles through a 200 mesh screen; (4) adding poly(ethyl acrylate), butyl stearate, and liquid paraffin to stir and mix, and then performing compression moulding; (5) putting compressed blanks into a sintering furnace to perform sintering; (6) performing cooling, and then performing compression again; and (7) putting the blanks into the sintering furnace to perform sintering, and then performing extrusion forming, wherein the extrusion temperature is 600-800 DEG C. The composite material is large in density, is good in compactness, has excellent mechanical property, and is long in service life.

Description

technical field [0001] The invention relates to the field of electronic materials, in particular to a composite contact material and a preparation method thereof. Background technique [0002] Contact material is one of the key materials of switches, instruments and relays, etc. It is mainly responsible for the work of connecting, disconnecting, guiding and isolating current. Its performance directly affects the reliability, stability and accuracy of electrical appliances and service life, so the contact material is not only the key to electronics and electrical appliances, but also its fatal point, and it is an indispensable and important material in electronic technology. With the rapid development of science and technology, the continuous upgrading of electronic and electrical products, the application of contact materials is becoming more and more extensive, and the consumption is also increasing, ranging from electrical equipment, communication equipment, various contac...

AI Technical Summary

Problems solved by technology

Silver-based materials are the most widely used contact materials in the electronic and electrical industry, but pure silver contacts have disadvantages such as poor anti-sulfurization ability, low hardness, and material transfer tendency when working under direct current. Materials are improved to continuously improve their mechanical and electrical properties, while saving their costs and creating a wider use space