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A kind of ag-mxene contact material and its preparation method and application

A contact material and powder technology, which is applied in the direction of connecting contact materials, carbon-silicon compound conductors, metal/alloy conductors, etc., can solve the problems of poor arc erosion resistance, high contact resistance, and strong welding resistance. Achieve the effect of excellent anti-welding performance, high density and low cost

Active Publication Date: 2019-03-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite contact material can solve the existing problems of contact materials in current applications: including toxicity, high temperature rise, high contact resistance, poor resistance to arc erosion, strong resistance to welding, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the mass fraction of the material: Ag (50%), Ti 3 C 2 (50%), weigh Ag powder 5g, Ti 3 C 2 Powder 5g; after mixing, press it into a green body at 10MPa, heat it to 500°C at a heating rate of 1°C / min under vacuum protection, keep it warm for 0.5h, and obtain Ag-50%Ti after cooling 3 C 2 contact material. Density 8.621g / cm 3 , hardness HV60, resistivity 28×10 -3 μΩ·m.

Embodiment 2

[0027] According to the mass fraction of the material: Ag (65%), Ta 4 C 3 (35%), weigh Ag powder 9.29g, Ti 3 C 2 Powder 5g; after mixing, press it into a green body at 50MPa; under the protection of Ar atmosphere, heat it to 600°C at a heating rate of 6°C / min, keep it for 0.8h, and obtain Ag-35%Ta after cooling 4 C 3 contact material. Density 8.651g / cm 3 , hardness HV62, resistivity 29×10 -3 μΩ·m.

Embodiment 3

[0029] According to the mass fraction of the material: Ag (70%), Ti 3 CN (30%), weigh Ag powder 11.67g, Ti 3 C 2 powder 5g; after mixing, press it into a green body at 100MPa; under the protection of nitrogen atmosphere, heat it to 700°C at a heating rate of 10°C / min, keep it for 1h, and obtain Ag-30%Ti after cooling 3 CN contact material. Density 8.633g / cm 3 , hardness HV66, resistivity 30×10 -3 μΩ·m.

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PUM

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Abstract

The invention discloses an Ag-MXene contact material and a preparation method and application thereof. An enhanced phase MXene comprises Ti3C2, Ti2C, Ta4C3, Ti3CN, Nb2C, V2C, Nb4C3, (Ti<0.5>, Nb<0.5>)2C and (V<0.5>, Cr<0.5>)3C2. The preparation method comprises the following steps of (1) weighing Ag powder and MXene powder according to a proportion of mass percent; (2) fully mixing the Ag powder and the MXene powder which are weighed to obtain a uniform mixture; (3) placing the mixed powder in a die for pressing to form a blank; and (4) placing the blank in a sintering furnace, heating the blank to a processing temperature at a certain temperature rise ratio under inertia atmosphere or vacuum protection, and performing heat preservation to obtain the contact material. The raw material is available, the used equipment and the preparation process are simple, the production process is environmental-friendly, and the product is suitably applied to a switch material of a low-voltage device such as a contactor, a relay and a circuit breaker on a large scale.

Description

technical field [0001] The invention relates to a composite material, in particular to an Ag-MXene contact material, its preparation method and application, and belongs to the technical field of contact materials. Background technique [0002] The contact is the core component of the low-voltage switch, responsible for connecting, carrying and breaking current, and its performance is directly related to the reliability of electrical equipment. The ideal contact material should have good electrical conductivity, thermal conductivity, welding resistance, material transfer resistance, arc erosion resistance and low and stable contact resistance. Ag-based contact materials are the most widely used in low-voltage switches, common Ag / CdO, Ag / SnO 2 , Ag / ZnO, Ag / Ni, Ag / C, Ag / W, Ag / WC, etc., have their own characteristics in structure, performance and application. Among them, the universal contact "Ag / CdO" has the best performance and is the most widely used, but the toxicity of Cd...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/02H01B1/04H01R4/58
CPCH01B1/02H01B1/04H01R4/58
Inventor 孙正明丁健翔郑伟张培根田无边张亚梅
Owner SOUTHEAST UNIV