Method for manufacturing electromagnetic conductive contact of iron-nickel-based composite material by sol-gel method

Abstract

The invention discloses a method for manufacturing an electromagnetic conductive contact of an iron-nickel-based composite material by a sol-gel method. A resin-based softened conductive soft magneticcore is obtained by producing an alloy oxide crystal with a spinel-like structure by a complex method, grinding a soft magnetic material into powder, mixing the powder with functional additive silverpowder, and filling a secondarily-vulcanized colloidal material, which is formed by mechanically blending polymethyl silicone resin, silicon dioxide polymethyl vinyl silicone rubber, and starch-grafted sodium acrylate, with the mixed powder as a functional filler. The electromagnetic conductive contact has small band gap, good electrical conductivity, high overall strength, high magnetic permeability, and self-wear resistance.

Description

technical field [0001] The invention relates to the technical field of electrical devices, in particular to a method for preparing an electromagnetic conductive contact made of an iron-nickel based composite material by a sol-gel method. Background technique [0002] In the conventional technology, the contact usually adopts plane contact, the contact surface is limited, and the contact resistance is relatively large. In order to reduce the contact resistance of the conductive contact, silver plating or silver embedding is generally used on the copper-based contact to reduce the contact resistance, but the silver surface is extremely It is easily oxidized, which leads to an increase in contact resistance. [0003] At the same time, the conductive contacts in the prior art are almost all made of integral metal. The essential characteristics of metal resistance determine its rigidity and high elastic limit, but it is prone to fatigue and fretting wear, relatively not resistant...

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Problems solved by technology

[0002] In the conventional technology, the contact usually adopts plane contact, the contact surface is limited, and the contact resistance is relatively large. In order to reduce the contact resistance of the conductive contact, silver plating or silver embedding is generally used on the copper-based contact to reduce the contact resistance, but the silver surface is extremely Easily oxidized, resulting in increased contact resistance

[0003] At the same time, the conductive contacts in the prior art are almost all made of integral metal. The essential characteristics of metal resistance determine its rigidity and high elastic limit, but it is prone to fatigue and fretting wear, relatively not resistant to impact, and easy to corrode. Prone to further reduction in contact area due to surface unevenness

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