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MAX@M composite electrical contact reinforced 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, large material transfer, and reduced workability due to the tendency of melting and welding.

Active Publication Date: 2020-10-27
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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  • MAX@M composite electrical contact reinforced phase material, composite electrical contact material and preparation method
  • MAX@M composite electrical contact reinforced phase material, composite electrical contact material and preparation method
  • MAX@M composite electrical contact reinforced phase material, composite electrical contact material and preparation method

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preparation example Construction

[0033] The preparation method of the reinforced phase material of the composite electric contact is specifically to sensitize the matrix MAX phase material in an acidic environment to generate MXene in situ on its surface, generate active MXene sites after activation treatment, and then coat the surface with chemical plating metal nanoparticles;

[0034] The MXene material is generated in situ on the surface of the sensitized matrix MAX material, and after activation, the surface-coated metal nanoparticle MAX@M is formed by electroless plating. The process is simple and can be carried out at room temperature, and the practical applicability is high. After covering the surface of MAX@M, the performance of the material is greatly improved.

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

[0036] S1: Weigh the MAX powder and add the acid solution, and put them together in a cylindrical r...

Embodiment 1

[0051] According to liquid: solid=10:1 mass ratio will 10gTi 3 SiC 2 Add the powder into the HF acid solution with a concentration of 10wt%, stir in a magnetic stirrer at a temperature of 30°C at a speed of 30rpm for 1 hour; use a 10mL centrifuge tube to take the mixture, and set the centrifuge at a speed of 600rpm The material was centrifuged for 1 hour, and the mixture was subjected to centrifugation and freeze-dried for 1 hour to remove moisture to obtain a surface-generated Ti 3 C 2 site Ti 3 SiC 2 powder; the mixed powder is immersed in a concentration of 10 wt% PdCl 2 In the activator for 1 hour, put in AgNO with a concentration of 20wt% after filtration 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 O mixed solution was stirred at 50 rpm for 1 h, the nanocomposite powder was washed with deionized water until the deionized water was transparent, and the nanocomposite powder was taken out and dried at 30° C. for 1 h. That is, ...

Embodiment 2

[0054] By liquid: solid=20:1 mass ratio will 20gTi 3 SiC 2 Add the powder into the HF acid solution with a concentration of 20wt%, stir in a magnetic stirrer at a temperature of 40°C at a speed of 50rpm for 4 hours; use a 10mL centrifuge tube to take the mixture, and set the centrifuge at a speed of 1500rpm The material was centrifuged for 2 hours, and the mixture was subjected to centrifugation and freeze-dried for 2 hours to remove moisture to obtain a surface-generated Ti 3 C 2 site Ti 3 SiC 2 powder; the mixed powder is immersed in a concentration of 20 wt% PdCl 2 1.5 hours in the activator, put into the CuSO concentration after filtering and be 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 2O mixed solution was stirred at 100rpm for 2h, the nanocomposite powder was washed with deionized water until the deionized water was transparent, and the nanocomposite powder was taken out and dried at 40°C for 2h. That is, t...

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Abstract

The invention discloses an MAX@M composite electrical contact reinforced phase material, a composite electrical contact material and a preparation method. The MAX@M composite electrical contact reinforced phase material is MAX@M coated with metal nanoparticles on the surface, the inner core of the MAX@M composite electrical contact reinforced phase material is a three-dimensional material MAX phase, and the outer shell is metal nanoparticles coated with the surface. An MXene material is generated through sensitization on the surface of an MAX phase, and after activation, metal nanoparticles are coated on the surface of the MXene material by using a chemical plating method to prepare an MAX@M composite electrical contact reinforced phase material coated with metal nanoparticles on the surface. After the reinforced phase material is compounded with the Ag base of the low-voltage electric contact, the problems of interface reaction and diffusion between Ag and MAX are effectively solved,and the chemical plating method is convenient in process, low in technical cost and high in practicability. When the MAX@M coated with the metal nanoparticles on the surface is used as the reinforcement phase of the low-voltage contact electric contact material, the maximum proportion of the reinforcement phase in the composite material can reach 50wt%, the silver-saving effect is obvious, and thebasic 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 reinforcement phase material, a composite electrical contact material and a preparation method. Background technique [0002] Electric contacts are widely used in low-voltage power distribution equipment components, such as relays, circuit breakers, contactors, protection switches, etc., and are the main actuators for low-voltage electrical systems to perform electrical contact actions to achieve the functional purpose of current control and protection. The ideal electrical contact material for low-voltage electrical appliances should not only have good electrical and thermal conductivity, carry current stably, but also be able to resist mechanical shock and arc erosion damage during electrical contact service. At present, the electrical contact materials for low-voltage switches are mainly represented by silver-based comp...

Claims

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Application Information

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Patent Type & Authority Applications(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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