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Preparation method of copper/graphite/tin oxide electric contact material

A technology of electrical contact materials and tin oxide, applied in tin oxide, contacts, circuits, etc., can solve the problems of short life, poor material reliability, etc., achieve low contact resistance, strong anti-welding ability, and improve anti-ablation ability Effect

Active Publication Date: 2021-01-26
XI'AN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of copper / graphite / tin oxide electrical contact material, which solves the problems of poor material reliability and short service life of existing copper-based electrical contact materials due to oxidation of the surface working layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A kind of preparation method of copper / graphite / tin oxide electrical contact material, specifically implement according to the following steps:

[0047] Step 1, preparing tin oxide particles;

[0048] The specific process of step 1 is:

[0049] Step 1.1, fully dissolving tin chloride hydrate in formaldehyde solution, and obtaining tin chloride solution after fully stirring;

[0050] The concentration of tin chloride solution is 0.05mol / L.

[0051] Step 1.2, adding polyethylene glycol and sodium hydroxide solution to the tin chloride solution prepared in step 1.1, and stirring evenly to obtain a white turbid solution;

[0052] Step 1.3, quickly transfer the white turbid liquid to a sealed reaction kettle, and put it into an electric blast drying box for heat preservation;

[0053] The concentration of sodium hydroxide solution is 0.01mol / L, the molecular weight of polyethylene glycol is 600, and the addition amount of polyethylene glycol is 0.3g.

[0054] Step 1.3 Pu...

Embodiment 2

[0063] A kind of preparation method of copper / graphite / tin oxide electrical contact material, specifically implement according to the following steps:

[0064] Step 1, preparing tin oxide particles;

[0065] The specific process of step 1 is:

[0066] Step 1.1, fully dissolving tin chloride hydrate in formaldehyde solution, and obtaining tin chloride solution after fully stirring;

[0067] The concentration of tin chloride solution is 0.07mol / L.

[0068] Step 1.2, adding polyethylene glycol and sodium hydroxide solution to the tin chloride solution prepared in step 1.1, and stirring evenly to obtain a white turbid solution;

[0069] Step 1.3, quickly transfer the white turbid liquid to a sealed reaction kettle, and put it into an electric blast drying box for heat preservation;

[0070] The concentration of sodium hydroxide solution is 0.013mol / L, the molecular weight of polyethylene glycol is 600, and the addition amount of polyethylene glycol is 0.35g.

[0071] Step 1.3 ...

Embodiment 3

[0080] A kind of preparation method of copper / graphite / tin oxide electrical contact material, specifically implement according to the following steps:

[0081] Step 1, preparing tin oxide particles;

[0082] The specific process of step 1 is:

[0083] Step 1.1, fully dissolving tin chloride hydrate in formaldehyde solution, and obtaining tin chloride solution after fully stirring;

[0084] The concentration of tin chloride solution is 0.1mol / L.

[0085] Step 1.2, adding polyethylene glycol and sodium hydroxide solution to the tin chloride solution prepared in step 1.1, and stirring evenly to obtain a white turbid solution;

[0086] Step 1.3, quickly transfer the white turbid liquid to a sealed reaction kettle, and put it into an electric blast drying box for heat preservation;

[0087] The concentration of sodium hydroxide solution is 0.015mol / L, the molecular weight of polyethylene glycol is 600, and the addition amount of polyethylene glycol is 0.4g.

[0088] Step 1.3 Pu...

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PUM

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Abstract

The invention discloses a preparation method of a copper / graphite / tin oxide electric contact material. The preparation method is specifically implemented according to the following steps: step 1, preparing tin oxide particles; step 2, placing copper powder, graphite powder and tin oxide particles in a horizontal planetary ball mill to be fully mixed to obtain evenly-mixed copper / graphite / tin oxidecomposite powder; and step 3, pressing, sintering and annealing the copper / graphite / tin oxide composite powder to obtain a copper / graphite / tin oxide electric contact material. The problem that an existing silver-based electric contact composite material is high in price and low in silver recovery rate can be solved. In addition, aiming at the problems of poor material reliability and short service life of an existing copper-based electric contact material due to oxidation of a surface working layer, the invention provides a silver-free electric contact material with low contact resistance, high conductivity, fusion welding resistance and strong arc extinguishing capability of a second-phase current network path.

Description

technical field [0001] The invention belongs to the technical field of material preparation technology, and in particular relates to a preparation method of a copper / graphite / tin oxide electrical contact material. Background technique [0002] Electrical contact materials play a vital role in the use of electrical energy, distribution of electrical energy, and current conversion. They are widely used in various electrical contact systems, and their performance directly affects the service life and stability of low-voltage electrical appliances. [0003] In the research of electrical contact materials, the research on silver-based contact materials is the most in-depth, and silver-based electrical contact materials are also most widely used in low-voltage electrical appliances. So far, hundreds of silver-based electrical contact materials have been developed. However, the output of silver is limited, and nearly a quarter of silver output is used to manufacture electrical con...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C32/00C22C1/05C01G19/02H01H1/025H01H1/027
CPCC22C9/00C22C32/0084C22C1/05C01G19/02H01H1/025H01H1/027
Inventor 付翀王金龙侯锦丽闫贞常延丽梁苗苗刘德华孙扬帆
Owner XI'AN POLYTECHNIC UNIVERSITY
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