关键词: 人造金刚石, 铁基触媒, 合成工艺, 高温高压

Abstract: It has been proved that the pressure and temperature of the synthetic room are fluctuant, that is to say that the diamond synthesizing point is excursive, when the diamond was synthesized at high temperature and high pressure. So, it is necessary to keep the balance of pressure and temperature for manufacturing high quality diamond crystal. One of the effective means is employing the nonconstant pressing and heating. By this mean, the diamond synthesizing test was carried out with ironbased catalyst made by powder metallurgy at cubic high pressure apparatus. The testing results indicate that the diamond crystal has large grain size, good crystal shape and outstanding mechanical properties, which is evaluated aboveSMD30.

Key words: ironbased catalyst, synthesizing technology, high temperature and high pressure , synthetic diamond