Preparation method of metal ion doped modified silver zinc oxide electric contact material

A technology of electrical contact materials and metal ions, applied in the manufacture of oxide conductors, non-metallic conductors, cables/conductors, etc., can solve problems such as poor wettability, easy agglomeration of zinc oxide, electrical contact life, etc.

Active Publication Date: 2022-01-21
HARBIN INST OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems of poor wettability between zinc oxide and silver matrix and short electrical contact life caused by easy agglomeration of zinc oxide in the preparation of existing silver zinc oxide electrical contact materials, the present invention proposes a metal ion doped Preparation method of modified silver zinc oxide electrical contact material

Method used

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  • Preparation method of metal ion doped modified silver zinc oxide electric contact material
  • Preparation method of metal ion doped modified silver zinc oxide electric contact material
  • Preparation method of metal ion doped modified silver zinc oxide electric contact material

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specific Embodiment approach 1

[0035] Specific implementation mode 1: The preparation method of the metal ion doped modified silver zinc oxide electrical contact material in this implementation mode is carried out according to the following steps:

[0036] Step 1: preparing lithium metal-doped zinc oxide powder by self-propagating combustion method;

[0037] Dissolve zinc nitrate, organic fuel and nitrate of doping elements in deionized water, and then mix with magnetic stirring for 30 minutes, and then heat to self-propagating combustion at 400-500°C to obtain metal ion-doped zinc oxide powder;

[0038] The doping element is lithium or silver;

[0039] Step 2: using a high-energy ball mill to mix metal ions to dope zinc oxide powder and silver powder to obtain a mixed powder;

[0040] In the mixed powder, the content of metal ion-doped zinc oxide powder is 8-15wt.%.

[0041] The process of using a high-energy ball mill to mix metal ions doped with zinc oxide powder and silver powder is as follows: the ba...

specific Embodiment approach 2

[0055] Embodiment 2: This embodiment differs from Embodiment 1 in that the ratio of the mass of zinc nitrate to the volume of deionized water in Step 1 is 2.89 g: 50 mL.

specific Embodiment approach 3

[0056] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the organic fuel described in step 1 is made by mixing glycine and urea.

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Abstract

The invention discloses a preparation method of a metal ion doped modified silver zinc oxide electric contact material, and relates to a preparation method of an electric contact material. The invention aims to solve the problems of poor wettability between zinc oxide and a silver substrate and short electric contact life caused by easy agglomeration of zinc oxide during preparation of the existing silver zinc oxide electric contact material. The method comprises the following steps: preparing lithium metal doped zinc oxide powder by a self-propagating combustion method, and mixing metal ion doped zinc oxide powder with silver powder to obtain mixed powder; primarily pressing the mixed powder to obtain a blank; primarily sintering the blank to obtain a sintered blank; re-pressing the sintered blank; and re-sintering. The doping of metal ions can improve the wettability between the zinc oxide and the silver substrate and solve the problem that the zinc oxide is easy to agglomerate; and high-energy ball-milling mixed powder is combined to ensure high-efficiency densification of the material, improve the second-phase dispersion effect and improve the electric contact performance. The preparation method of the invention is suitable for preparing the silver zinc oxide electric contact material.

Description

technical field [0001] The invention relates to a preparation method of an electrical contact material. Background technique [0002] Low-voltage electrical contact components mostly use silver-based electrical contact materials manufactured by powder metallurgy. Low-voltage electrical contact components serve under alternating load conditions such as mechanical shock and partial arc ablation, so high requirements are placed on the mechanical stability and arc ablation resistance of electrical contact materials. In recent years, with the development of new applications with high service currents such as wind power control and electric vehicles, the conventional electrical contact materials produced by the current process cannot meet the requirements of low-pressure Application requirements of high current electrical appliances. [0003] Due to the excellent thermal properties of zinc oxide, silver zinc oxide electrical contact materials exhibit excellent anti-welding abili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C5/06C22C32/00B22F3/16B22F9/04H01B1/08H01B13/00
CPCC22C1/05C22C5/06C22C32/001B22F3/16B22F9/04H01B1/08H01B13/00B22F2009/043
Inventor 邵文柱甄良陈梓尧
Owner HARBIN INST OF TECH
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