Process for preparing microcrystalline diamond

Application Number: 00110586
Application Date: 2000.06.30
Publication Number: 1298757
Publication Date: 2001.06.13
Priority Information:
International: B01J3/06
Applicant(s) Name: Zhu Guizeng
Inventor(s) Name: Zhu Guizeng;Guo Dongzhang;Li Gui
Patent Agency Code: 21109
Patent Agent: liang yan
Abstract A preparation method of microcrystalline diammond includes the following steps: preparing material, synthetic column formation, drying, assembling, synthesizing diamond, crushing and post-treatment, grading and packaging. The said method use purified natural 3R type graphite powder and special catalyst as raw material, the synthetic column formation uses the continuous method, drying temperature is 80-150 deg.C, and drying time is more than 2 hrs. The synthetic column is mounted in the pyrauxite synthesis cavity, a hexagonal push press is used to apply pressure and at the same time, heating to obtain the diamond. The average conversion rate can be up to higher than 50%, the diamond is high in strength and fastness to wear.