A kind of graphite core column material and preparation method thereof
A technology of graphite core column and graphite layer, which is applied in the field of superhard material graphite core column synthesis, can solve the problems of insufficient penetration, influence, and impact on the output and quality of artificial diamond, and achieve the purpose of increasing output and quality, improving catalytic performance, increasing The effect of a large contact area
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[0019] A kind of preparation method of graphite core column material, concrete steps are as follows:
[0020] The first step: using the sol-gel method to prepare nano-iron oxide powder with uniform particle size; 2 In the atmosphere, using 99.93% pure nickel block as raw material, nano-nickel powder with uniform particle size was prepared by plasma arc method; nano-iron oxide powder, nano-nickel powder and nano-graphite powder were taken and mixed to obtain nano-mixed powder; , in terms of Fe / Ni, the molar ratio of iron oxide powder to nickel powder is 1:1; the mass percentage of graphite powder in the mixed powder is 60%.
[0021] The second step: place the nano-mixed powder in a closed system for vacuuming, at a vacuum degree of 10 -3 Pa, filled with hydrogen, heated to 1200 ° C for 8 hours to achieve reduction treatment, remove the oxygen content in it, and improve the catalyst activity.
[0022] Step 3: After the heat preservation heat treatment in the second step, the t...
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