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Silver-based electrical contact material

一种电接触材料、银基的技术，应用在触点、电路、电开关等方向，能够解决难以实现均匀的分散、不可行、增加材料制造成本等问题

Active Publication Date: 2013-10-23
SCHNEIDER ELECTRIC IND SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although diamond can optimize the mechanical properties of silver-based electrical contact materials, it also greatly increases the manufacturing cost of the material, so this type of method is not feasible in actual production
In addition, it is difficult to achieve uniform dispersion by adding diamond by powder metallurgy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] The preparation method of silver-based electrical contact material of the present invention comprises the following steps:

[0016] (a) providing a carbonaceous mesophase solution;

[0017] (b) adding a silver source to the carbonaceous mesophase solution and stirring to obtain a mixture;

[0018] (c) removing the solvent from the mixture to obtain a solid;

[0019] (d) heat-treating the solid to obtain a silver-based electrical contact material.

[0020] The preparation method and characteristics of the silver-based electrical contact material of the present invention will be described in detail below in conjunction with specific processes.

[0021] (1) Carbonaceous mesophase solution

[0022] The carbonaceous mesophase solution provided in the method of the present invention provides the carbonaceous substance in the electrical contact material as a raw material. This carbonaceous mesophase solution is prepared by dissolving the carbonaceous mesophase in a suita...

Embodiment 1

[0075] Provides a carbonaceous mesophase solution

[0076] The carbonaceous mesophase can be obtained according to known methods. The biomass-derived carbonaceous mesophase powder used in the present invention was obtained from Shandong Qufu Tianbojing Carbon Technology Co., Ltd.

[0077] The carbonaceous mesophase solution was prepared as follows:

[0078] The biomass-derived carbonaceous mesophase powder is placed in ethanol, stirred and dissolved, and left standing to obtain a carbonaceous mesophase solution. The concentration of the solution was determined by drying, and an appropriate amount of solvent was added for dilution according to the measurement results to obtain a carbonaceous mesophase solution with a concentration of 4%. Measure an appropriate amount of solvent and add, obtain a series of ethanol solutions of carbonaceous mesophase after fully stirring, the concentration of carbonaceous mesophase is respectively 0.4%, 0.04%, and 1%, 0.1% and 0.01% (all by w...

Embodiment 2

[0082] Embodiment 2 prepares solid-liquid mixture

[0083] Immerse the chemical silver powder and the atomized silver powder in the carbonaceous mesophase ethanol solution of different concentrations prepared in Example 1 respectively, after fully mixing, evaporate and remove the ethanol, thus obtaining the silver-carbon composite body, wherein the carbonaceous The concentrations of the mesophase solutions are shown in Table 1.

[0084] EDX qualitatively analyzed the coating amount of carbonaceous silver powder (expressed in weight %) obtained by impregnating atomized silver powder and chemical silver powder with different concentrations of carbonaceous mesophase solutions, and the results are shown in Table 1 below.

[0085] Table 1: Qualitative analysis of carbonaceous mesophase solution by EDX to compare the impregnation coating amount of atomized silver powder and chemical silver powder

[0086]

[0087] From the EDX analysis results in Table 1, it can be clearly seen ...

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Abstract

The invention relates to a novel silver-based electrical contact material, wherein silver acts as a continuous phase, and carbon acts as a nanoscale dispersion phase and disperses in the silver continuous phase. The content of the carbon dispersion phase in the silver-based electrical contact material can be 0.02-5wt% on the basis of the total weight of the silver-based electrical contact material. According to the invention, the carbon comprises carbon in the form of diamond. The silver-based electrical contact material provided by the invention shows excellent mechanical abrasion resistance and electrical properties.

Description

technical field [0001] The invention relates to a silver-based electrical contact material. Background technique [0002] Electrical contact materials, also known as electrical contact materials or contacts or joints, are important components in instruments and meters such as high and low voltage electrical switches. [0003] In the current field of preparation of silver-based electrical contact materials, such as in the preparation of silver-carbon electrical contact materials, powder metallurgy or high-energy ball mill dispersion is usually used to achieve uniform mixing of silver powder and graphite powder, and then isostatic pressing of the mixed powder Sintering, extrusion molding, slicing and other processes to obtain the required contact material. However, when processing powders, traditional powder metallurgy and high-energy ball milling methods can only achieve uniform mixing at the micro scale, and often lead to uneven mixing, accompanied by powder agglomeration, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/0233
CPCH01H11/048C22C5/06H01H1/027C22C32/0084H01H1/023H01H11/04B22F9/24C22C26/00C22F1/14H01B1/04H01H2300/036
Inventor 刘楠
Owner SCHNEIDER ELECTRIC IND SAS