A kind of graphene/copper electrical contact material and preparation method thereof
A technology of electrical contact materials and contact materials, applied in the field of materials, can solve problems such as restricting the development of graphene/metal composite materials, easy agglomeration interface bonding, and low density of graphene
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Embodiment 1
[0097] Example 1 Graphene / copper powder 1
[0098] 1) Add 100nm copper powder (100g, atomized copper powder) into the fluidized bed.
[0099]2) The methane enters the methane cracking device through the outer ring gas pipe, and is heated by the tantalum heating wire, and the hydrocarbon atoms enter the fluidized bed from the side seam of the mesh nozzle.
[0100] 3) The hydrogen enters the fluidized bed, and the copper powder is fluidized by adjusting the mass flow meter. The fluidized bed was heated to 800°C.
[0101] 4) After keeping the temperature at 800°C for 0.5 hours, continue to fluidize the gas with hydrogen, turn off the methane, until the temperature drops to room temperature (the cooling rate is 50°C / min) to obtain the copper powder coated with graphene on the surface, that is, graphene / copper powder body 1.
[0102] Tested by an infrared carbon-sulfur analyzer, the purity of the graphene / copper powder 1 is very high, and its carbon content is only 0.1 wt%, indi...
Embodiment 2
[0108] Example 2 Graphene / copper electrical contact material 1
[0109] The graphene / copper powder 1 obtained in Example 1 was hot-pressed and sintered, the back vacuum was 5Pa, the temperature was 1000° C., and the treatment time was 30min to obtain the graphene / copper electrical contact material 1.
[0110] Tested by a contact resistance tester, the copper block obtained by sintering the copper powder used in Example 1 under the sintering conditions described in Example 2 was oxidized in air at 220 ° C for 6 hours, and the contact resistance of the copper block was 1.11Ω, while the graphite The contact resistance of the graphene / copper electrical contact material 1 after oxidation under the above conditions is 0.72Ω, which is 0.64 times that of the copper block, indicating that the graphene / copper electrical contact material 1 has good oxidation resistance.
[0111] After testing, the electrical conductivity of graphene / copper electrical contact material 1 is 57MS / m, which i...
Embodiment 3
[0112] Example 3 Graphene / copper powder 2
[0113] 1) Add 10nm copper powder (200g, atomized copper powder) into the fluidized bed.
[0114] 2) The ethane enters the methane cracking device through the outer ring gas pipe, and is heated by the tantalum heating wire, and the hydrocarbon atoms enter the fluidized bed from the side slit of the mesh nozzle.
[0115] 3) The hydrogen enters the fluidized bed, and the copper powder is fluidized by adjusting the mass flow meter. The fluidized bed was heated to 700°C.
[0116] 4) After being kept at 700°C for 0.3 hours, continue the hydrogen fluidization gas, close the ethane, until the temperature drops to room temperature (the cooling rate is 40°C / min), and obtain the copper powder coated with graphene on the surface, that is, graphene / copper Powder 2.
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Abstract
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