Preparation method of siluer metal oxide electric contact material

A technology of oxide electrical and contact materials, applied in the direction of contact materials, etc., can solve the problems of complex oxide mixture procedures, difficult processing, uneven powder mixing in powder metallurgy, etc., to reduce the size of powder grains and improve processing Performance and production cost reduction effects
CN1477219AInactive Publication Date: 2004-02-25INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2004-02-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The preparation method of silver metal oxide electric contact material is characterized by that it adopts high-energy ball-grinding process to prepare silver-containing alloyed or intermetallic compound or obviously-fined powder, then utilizes the processes of internal oxidation and forming treatment so as to obtain the invented electric contact. It utilizes the control of partial pressure and temp. of oxygen in the course of internal oxidation of can obtain dispersed distribution of nano-grade or micrometer-grade metal oxide in silver base body. There is a self-formed interface between the oxide and silver base body.
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Description

Technical field:

[0001] The invention belongs to the field of electrical functional materials, and relates to a manufacturing method of a silver-based electrical contact material. Background technique:

[0002] Electrical contact material is the core component and key material of electric power and electronic devices. It undertakes the task of connecting and disconnecting the circuit and load current, and determines the breaking ability and contact reliability of the switch. At present, silver cadmium oxide (AgCdO) alloy is mainly used in medium and low voltage electrical contacts. However, AgCdO alloys release toxic vapors during production and use, which poses serious environmental pollution problems. Moreover, as electrical switches put forward strict performance requirements such as miniaturization, high reliability, and long life for electrical contacts, AgCdO alloys have shown shortcomings in performance indicators such as welding resistance and arc erosion resistance...

Claims

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