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Low-voltage apparatus electrical contact material and preparation method thereof

A technology for electrical contact materials and low-voltage electrical appliances, applied in contacts, circuits, electrical switches, etc., can solve the problems of limited resources, difficulty in large-scale use of low-voltage electrical appliances, etc., achieve uniform distribution, stable crystal phase, and reduce surface temperature Effect

Inactive Publication Date: 2014-04-02
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our country is a low-bank country with limited resources. It takes a lot of foreign exchange to import every year, so it is difficult to use it on a large scale in low-voltage electrical appliances.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve cerium nitrate in water to form a 0.5mol / L aqueous solution, put the diamond particles and the aqueous solution of cerium nitrate into a ball mill, and disperse them with a corundum ball mill for 1 hour, dry the mixture at 95°C for 4 hours in an infrared drying oven, and then put it into a In a porcelain crucible, under the protection of nitrogen or argon, bake at 650°C for 3h. The calcined product is crushed into diamond-cerium oxide composite particles.

[0021] Put the diamond-cerium oxide composite particles into the three-dimensional mixer, add the wetting agent, mix for 10 minutes, add copper-tungsten alloy powder, granulate and mix for 2 hours, and it is the molding material. The molding material is added into the mold, and hot-pressed on the press for molding. The formed test block was put into a high-temperature vacuum sintering furnace, and sintered at 1000 ° C for 2 h with argon gas.

Embodiment 2

[0023] Dissolve cerium nitrate in water to make a 0.5mol / L aqueous solution, put the diamond particles and the aqueous solution of cerium nitrate together into a ball mill, disperse with a corundum ball mill for 1 hour, dry the mixture at 90°C for 4 hours in an infrared drying oven, and then put it into a In a porcelain crucible, it was fired at 750°C for 2 hours in a vacuum sintering furnace. The calcined product is crushed into diamond-cerium oxide composite particles.

[0024] Add diamond-cerium oxide composite particles into the three-dimensional mixer, add wetting agent, mix for 10 minutes, add copper-tungsten alloy powder, mix for 2 hours, and it is the molding material. The molding material is added into the mold, and hot-pressed on the press for molding. The formed test block was put into a high-temperature vacuum sintering furnace, and sintered at 850 ° C for 2 h with argon gas.

Embodiment 3

[0026] Make cerium carbonate and diamond particles into a cream with water and put them into a ball mill, disperse them with a corundum ball mill for 1 hour, dry the mixture in an infrared drying oven at 100°C for 4 hours, then put it into an alumina crucible, and protect it with argon. Baking at 580-1000°C for 1-8h.

[0027] Use corundum balls to mill the roasted product in a ball mill or a Raymond mill jet mill to break the joint crystals produced during the roasting process.

[0028] The obtained product cerium oxide accounts for 1% by mass of diamond.

[0029] Add diamond-cerium oxide composite particles into the three-dimensional mixer, add wetting agent, mix for 10 minutes, add copper-tungsten alloy powder, mix for 2 hours, and it is the molding material. The molding material is added into the mold, and hot-pressed on the press for molding. The formed test block was put into a high-temperature vacuum sintering furnace, and sintered at 950 ° C for 2 h with argon gas.

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Abstract

The invention discloses a low-voltage apparatus electrical contact material and a preparation method thereof. The preparation method is characterized in that nano-diamond and an aqueous solution of Ce3<+> cerium salt are uniformly mixed into a precursor by ultrasonic wave; the precursor is dried for 4h at the temperature of 90-100 DEC G, is loaded in a porcelain crucible, and is roasted for 1-2h under the temperature of 600-850 DEG C in a vacuum sintering furnace; a roasted product is smashed by a ball mill or a jet mill; after a wetting agent is added into and mixed with the smashed product, the mixed product and copper tungsten alloy powder are added into and uniformly mixed in a three-dimensional blender mixer in proportion; the mixed product is added into a mold for hot press molding and is sintered for 1.5-4h in the vacuum sintering furnace with the temperature of 1000 DEG C. The low-voltage apparatus electrical contact material has the advantages that the electrical contact material contains the nano-diamond, the dispersion strengthening function is realized, and the super-strong hardness and the wear-resisting property are realized; the diamond is super-strong in heat-conducting property, the surface temperature can be reduced, and the fusion welding and the electric ablation are resisted; the diamond is covered by cerium oxide, the electron work function is lower, the movement of an electric arc is dispersed, and the concentrated ablation on the contact material by the electric arc is reduced; the cost is greatly reduced as copper replaces silver.

Description

technical field [0001] The invention belongs to the technical field of electrical contact materials, in particular to a copper-based electrical contact material containing diamond-cerium oxide composite particles and a preparation method thereof Background technique [0002] Electric contact materials are conductive materials suitable for energizing or connecting circuits. According to the load size of the working current, it is divided into strong electric or medium electric contacts used in the electric power industry, and weak electric contacts in instruments, electronic devices, computers and other equipment. The performance of its electrical contacts mainly affects the reliability and service life of electrical equipment, electrical switches and instruments. [0003] Qualified electrical contact materials should have physical properties such as long service life, impact resistance, corrosion resistance, low resistance, good conductivity, and easy welding and processing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/027H01H11/04
Inventor 徐振方崔希文崔巍
Owner HENAN UNIVERSITY OF TECHNOLOGY
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