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A kind of max@m composite electrical contact reinforcement phase material, composite electrical contact material and preparation method

A technology of electrical contact material and enhanced phase, applied in the direction of contacts, circuits, electrical switches, etc., can solve the problems of poor Ag/Ni anti-welding performance, reduced workability of melting and welding tendency, and large material transfer, etc. The effect of good, low technical cost and convenient process

Active Publication Date: 2022-08-09
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under high current working conditions, Ag / Ni has poor anti-welding performance, large material transfer, and limited application.
Ag / C has good electrical and thermal conductivity and strong arc corrosion resistance, but C on the surface of the contact is easily oxidized to form a carbon-rich layer when the temperature rises during operation, which leads to an increase in the tendency of melting and welding in the later period of service and reduces workability

Method used

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  • A kind of max@m composite electrical contact reinforcement phase material, composite electrical contact material and preparation method
  • A kind of max@m composite electrical contact reinforcement phase material, composite electrical contact material and preparation method
  • A kind of max@m composite electrical contact reinforcement phase material, composite electrical contact material and preparation method

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preparation example Construction

[0033] The preparation method of the composite electrical contact reinforced phase material specifically generates MXene in situ on the surface of the sensitized parent MAX phase material in an acidic environment, generates active MXene sites after activation treatment, and then uses electroless plating to coat the surface of the material. metal nanoparticles;

[0034] By sensitizing the parent MAX material, MXene material is generated in situ on its surface, and after activation, electroless plating is used to form surface-coated metal nanoparticles MAX@M. The process is simple and can be carried out at room temperature. After covering the MAX@M surface, the material properties are greatly improved.

[0035] Specifically, the preparation method of the composite electrical contact reinforcing phase material includes the following steps:

[0036] S1: Weigh the MAX powder and add the acid solution, and place them together in a cylindrical reaction kettle, and activate them by m...

Embodiment 1

[0051] According to the mass ratio of liquid:solid=10:1, 10gTi was 3 SiC 2 The powder was added to HF acid solution with a concentration of 10 wt%, and stirred at a temperature of 30 rpm in a magnetic stirrer for 1 hour at a speed of 30 rpm; a 10 mL centrifuge tube was used to multiply the mixed solution, and the centrifuge was set at 600 rpm. The material was centrifuged for 1 hour, and the mixture was centrifuged and then freeze-dried for 1 hour using a freeze dryer to remove moisture to obtain Ti on the surface. 3 C 2 Ti at the site 3 SiC 2 powder; the mixed powder was immersed in 10 wt% PdCl 2 1 hour in the activator, after filtration, add AgNO with a concentration of 20wt% 3 , CH 3 OH, HCHO, NaOH, EDTA-2Na, C 4 H 4 O 6 KNa·4H 2 O, K 4 [Fe(CN 6 )] 3H 2 The mixture was stirred at 50 rpm for 1 hour, and the nanocomposite powder was washed with deionized water until the deionized water after cleaning was transparent. The nanocomposite powder was taken out and dri...

Embodiment 2

[0054] According to the mass ratio of liquid:solid=20:1, 20gTi was 3 SiC 2 The powder was added to HF acid solution with a concentration of 20 wt%, and stirred at a temperature of 50 rpm for 4 hours in a magnetic stirrer at a temperature of 40 °C; a 10 mL centrifuge tube was used to multiply the mixed solution, and the centrifuge was set at 1500 rpm. The material was centrifuged for 2 hours, the mixture was centrifuged and then freeze-dried by a freeze dryer for 2 hours to remove moisture to obtain Ti on the surface. 3 C 2 Ti at the site 3 SiC 2 powder; this mixed powder was immersed in PdCl at a concentration of 20 wt% 2 1.5 hours in the activator, after filtration, put in CuSO with a concentration of 30wt% 4 ·5H 2 O, CH 3 OH, HCHO, NaOH, EDTA-2Na, C 4 H 4 O 6 KNa·4H 2 O, K 4 [Fe(CN 6 )] 3H 2The mixture was stirred at 100 rpm for 2 hours, and the nanocomposite powder was washed with deionized water until the deionized water after cleaning was transparent. The na...

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Abstract

The invention discloses a MAX@M composite electrical contact reinforcing phase material, a composite electrical contact material and a preparation method. It is a MAX@M surface-coated metal nanoparticle, its inner core is a three-dimensional material MAX phase, and its outer shell is a surface-coated MAX@M. MAX@M composite electrical contact enhanced phase coated with metal nanoparticles is prepared by coating metal nanoparticles on its surface by electroless plating after activation by sensitizing the surface of the MAX phase to generate MXene materials. Material; after the reinforcement phase material is compounded with the low-voltage electrical contact Ag matrix, the interfacial reaction and diffusion problems between Ag-MAX are effectively solved, and the electroless plating process is convenient, the technical cost is low, and the practicability is strong; the use of surface coating When the MAX@M of metal nanoparticles is used as the reinforcement phase of the electrical contact material of the low-voltage electrical contact, the content of the reinforcement phase can reach up to 50wt% of the composite material, and the silver saving effect is obvious and the basic performance of the composite material can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of electrical contact materials, in particular to a MAX@M composite electrical contact reinforcing phase material, a composite electrical contact material and a preparation method. Background technique [0002] Electrical contacts are widely used in low-voltage power distribution equipment components, such as relays, circuit breakers, contactors, and protection switches. The ideal electrical contact material for low-voltage electrical appliances should not only have good electrical and thermal conductivity, and can carry current stably, but also resist the mechanical shock and arc erosion damage during the service of the electrical contact. At present, the electrical contact materials for low-voltage switches are mainly represented by silver-based composite materials. Among them, Ag / CdO has outstanding electrical contact performance and is known as "universal contact", which has dominated the market for a lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H1/0233H01H11/04
CPCH01H1/0233H01H11/048H01H11/04
Inventor 丁健翔张骁陈立明王东孙正明柳东明张世宏徐东杨媛
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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