Preparation method of metal-based graphene composite material and metal-based graphene electric contact
A composite material and electrical contact technology, which is applied in the coating process of metal materials, contacts, circuits, etc., can solve the problem of increasing the preparation process and cost of copper-based graphene materials, hidden dangers of electrical switch instruments, and cumbersome preparation processes, etc. problems, achieve low cost, prevent sintering and agglomeration, and make the preparation process simple
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[0034] The preparation method of metal-based graphene composite material of the present invention comprises the following steps:
[0035] Step S1: The graphene powder and the metal powder are ground and mixed to form a mixed powder.
[0036] Step S2: the mixed powder is grown in an oxygen-free environment at 950-1050° C. by chemical vapor deposition to form a graphene film on the surface of the metal powder to form a metal-based graphene composite material.
[0037] Specifically, the above-mentioned metal powder may be copper powder, nickel powder or a mixed metal powder of copper powder and nickel powder, and the content of the metal powder in the mixed powder is 90wt%-99.5wt%.
[0038] In step S1, the metal powder and graphene powder are mixed by ball milling, and the metal powder and graphene powder are placed in a ball mill for grinding and mixing. The grinding and mixing time of the ball mill is controlled within 3 to 12 hours. The ratio is 2:1~10:1, so that the metal po...
Embodiment 1
[0052] The specific steps of the preparation method of the metal-based graphene composite material in this embodiment are:
[0053] Step S1: put the copper powder and graphene powder into a planetary ball mill and grind for 12 hours, the ball-to-material ratio is 2:1, grind and mix evenly to form a mixed powder, in the mixed powder, the particle size of the metal powder is 500nm~75μm, The content of copper powder is 94.5wt%.
[0054] Step S21: The mixed powder is loaded into a quartz carrier and sent into the reaction chamber of the chemical vapor deposition equipment.
[0055] Step S22: Vacuumize the reaction chamber to 1×10 -2 Below kPa, then pass 150 sccm of argon gas into the reaction chamber to make it normal pressure, open the exhaust valve of the chemical vapor deposition equipment, so that the reaction chamber is in a state full of argon gas. Then, the temperature of the reaction chamber was raised at a rate of 20° C. / min until the temperature in the reaction chamber...
Embodiment 2
[0062] The specific steps of the preparation method of the metal-based graphene composite material in this embodiment are:
[0063] Step S1: Put nickel powder and graphene powder into a planetary ball mill and grind for 3 hours, the ball-to-material ratio is 10:1, grind and mix evenly to form a mixed powder, in the mixed powder, the particle size of the metal powder is 500nm~75μm, The content of nickel powder is 93%wt.
[0064] Step S21: The mixed powder is loaded into a quartz carrier and sent into the reaction chamber of the chemical vapor deposition equipment.
[0065] Step S22: Vacuumize the reaction chamber to 1×10 -2 Below kPa, then pass 100 sccm of argon gas into the reaction chamber to make it normal pressure, open the exhaust valve of the chemical vapor deposition equipment, so that the reaction chamber is in a state full of argon gas. Then, the temperature of the reaction chamber was raised at a rate of 10°C / min until the temperature in the reaction chamber reached...
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Abstract
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