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Complex conductive oxide-modified copper-based electric contact material and preparation method thereof

A technology of conductive oxides and electrical contact materials, applied in contacts, circuits, electrical switches, etc., can solve the problems of short life of breaking contacts of low-voltage electrical switches

Inactive Publication Date: 2018-10-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of short service life of the disconnecting contacts of low-voltage electrical appliances, and provides a complex conductive oxide modified copper-based electrical contact material and its preparation method

Method used

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  • Complex conductive oxide-modified copper-based electric contact material and preparation method thereof
  • Complex conductive oxide-modified copper-based electric contact material and preparation method thereof
  • Complex conductive oxide-modified copper-based electric contact material and preparation method thereof

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specific Embodiment approach 1

[0031] Specific Embodiment 1: The complex conductive oxide modified copper-based electrical contact material in this embodiment is characterized in that the complex conductive oxide-modified copper-based electrical contact material is composed of 2% to 15% complex conductive oxide, 0.004% to 0.01% of lanthanum, 0.1% to 0.3% of zirconium and the balance of copper; the molecular formula of the complex conductive oxide is Zn x Cd (2-x) SnO 4 , x in the molecular formula is 0-2.

[0032] The beneficial effects of this embodiment are:

[0033] 1. This embodiment adopts the principle of complex conductive oxide as the second phase and matrix alloying for material design, and realizes material preparation through liquid phase in-situ synthesis, co-deposition and subsequent heat treatment to obtain high arc ablation resistance, A new type of copper-based electrical contact material with low and stable contact resistance; the complex conductive oxide modified copper-based electrical...

specific Embodiment approach 2

[0041] Specific embodiment two: the preparation method of complex conductive oxide modified copper-based electrical contact material in this embodiment is specifically carried out according to the following steps:

[0042] 1. Weigh cadmium acetate dihydrate, zinc acetate dihydrate, five Tin chloride hydrate and copper alloy powder; said complex conductive oxide has the molecular formula Zn x Cd (2-x) SnO 4 , x in the molecular formula is 0~2;

[0043] 2. Dissolve the cadmium acetate dihydrate, zinc acetate dihydrate and tin chloride pentahydrate in the step 1 respectively in distilled water to obtain a concentration of 1.55M~1.65M cadmium acetate solution and a concentration of 1.55M~1.65M acetic acid Zinc solution and tin chloride solution with a concentration of 0.75M ~ 0.85M; mix cadmium acetate solution, zinc acetate solution and tin chloride solution, then add copper alloy powder and distilled water, in a water bath with a temperature of 60°C ~ 85°C Stir to obtain a s...

specific Embodiment approach 3

[0049] Embodiment 3: This embodiment differs from Embodiment 2 in that: the particle size of the copper alloy powder in step 1 is 25-44 μm. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention discloses a complex conductive oxide-modified copper-based electric contact material and a preparation method thereof, and relates to a copper-based electric contact material and a preparation method thereof. The invention aims at solving the problem of short life of a break contact of a low-voltage electrical appliance switch. The complex conductive oxide-modified copper-based electric contact material is composed of complex conductive oxide, lanthanum, zirconium and the balance copper in percentage by mass; and the molecular formula of the complex conductive oxide is ZnxCd(2-x)SnO4, and x in the molecular formula is 0-2. The preparation method comprises the following steps: weighing cadmium acetate dihydrate, dihydrate dihydrate, tin chloride pentahydrate and copper alloy powder, and dissolving the raw materials into distilled water separately and stirring to obtain a suspension, adjusting the pH value to obtain precipitates, washing, carrying out vacuum drying, calcining, sieving, carrying out cold-pressing molding, sintering, and extruding or rolling. The contact part prepared from the material disclosed by the invention is high in contact conducting capacity, self-arc-extinguishing capacity, matrix wettability and arc erosion resistance. The preparation method disclosed by the invention is applicable to preparation for the copper-based electric contact material.

Description

technical field [0001] The invention belongs to the field of electrical materials, and in particular relates to a copper-based electrical contact material and a preparation method thereof. Background technique [0002] As we all know, most of the electrical contact materials for low-voltage electrical appliances are precious metals, such as silver-based alloys or composite materials. Although silver-based materials can ensure good service characteristics of electrical contact elements and reliable operation of electrical appliances, it leads to a large consumption of rare and precious metals. Compared with silver, the biggest problem with copper as an electrical contact material is that it is easy to oxidize, and the resulting oxide film is not conductive. Therefore, when copper is used as the matrix of electrical contact materials, the problem of oxidation during storage and service must be solved. The current research results suggest that alloying with rare earth element...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/00C22C32/00C22C1/05H01H1/025
CPCC22C1/05C22C9/00C22C32/0021H01H1/025
Inventor 邵文柱徐成彦姜建堂甄良
Owner HARBIN INST OF TECH
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