Preparation method of silver-copper-oxide electrical contact material

Abstract

The invention discloses a preparation method of a silver-copper-oxide electrical contact material, which comprises the following steps: 1 weighing oxide powder and abrading-ball respectively and processing the weighed oxide powder through the high energy ball milling method to obtain a nanometer level oxide powder; 2 mixing a silver powder, a copper powder and a nanometer level oxide powder obtained from step 1 to obtain a mixed powder A, and conducting mechanical alloyage surface treatment to the mixed powder A to obtain a mixed powder B; and 3 conducting procedures of annealing, moulding, sintering and extruding to the mixed powder B obtained from step 2 to obtain the silver-copper-oxide electrical contact material. According to the preparation method of the silver-copper-oxide electrical contact material, the cheap metal copper is used to substitute partial precious metals silver; at the same time, oxide is added to prepare the electrical contact material; in this way, not only the preparation cost is low; the obtained electrical contact material has good conductive performance and long service life.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of composite materials, and in particular relates to a preparation method of a silver-copper oxide electrical contact material. Background technique [0002] The existing preparation methods of silver-based electrical contact materials are mainly divided into traditional processes and new processes that are beneficial to improve the performance of contacts. [0003] The traditional process can be roughly divided into two types, namely: general powder metallurgy method (traditional powder metallurgy method, reaction spray method, mechanical alloying method, reaction synthesis method) and internal oxidation method (alloy internal oxidation method, pre-oxidized alloy method) However, most of the conventional techniques have the problems of poor overall performance and short service life of the prepared electrical contact materials. [0004] In recent years, new processes that are conduci...

AI Technical Summary

Problems solved by technology

Although the electrical conductivity of the electrical contact materials prepared by these methods is relatively good, most of them have the disadvantages of high cost, complicated process parameters, difficult to control, and long process cycle, making it difficult to realize industrial production and application.

[0005] Especially in the production process of electrical contact materials, a large amount of silver will be used, which will cause an increase in the preparation cost

However, in the existing technology, if the silver content in the preparation process of the electrical contact material is reduced, the electrical conductivity and processing performance of the contact material will also be reduced, which will eventually affect the overall performance and service life of the contact material.

[0006] As far as the existing technology is concerned, there is no method on the market that uses cheap metal copper to replace part of the precious metal silver, and at the same time adds oxides to prepare electrical contact materials