Diamond powder and the former Soviet Union rather refined round of diamond powder

Static synthetic diamond powder catalyst method best carbon discussion Zhu Jiayong , Liu Zhongxiao , Zhang Xiao Xu , Xu Yumin ( Jilin Institute of Metallurgy ) ( rock graphite mine ) Abstract discovered a Type 3R content of up to about 30%, the degree of graphitization up to 94 % natural specialty graphite and successfully implemented with static method to touch coal direct synthesis of natural graphite diamond powder .diamond graphite conversion rate as high as 47 percent, complete crystal rate 76.2% , and so on more than 98% plot type , shape and type Ⅳ United States and the former Soviet Union refined diamond powder of diamond powder quite rounded , this paper introduces the best kinds of synthetic diamond powder specialty  polycrystalline diamond  main characteristics of natural and synthetic diamond powder used in the test situation . Introduction In the static pressure  Diamond blade  of diamond production , despite a lot of work , developed a variety of special graphite, transform a variety of ingredients, the development of new catalysts , and  Synthetic diamond  synthesis process parameters and process , graphite a diamond the conversion rate has been low ( 10% to 20% ) , severely restricts the diamond yield improvement and cost reduction. For this problem, in recent years to seek the best carbon source to do some work, made ​​with natural specialty graphite as carbon catalyst method using hydrostatic successful direct synthesis of diamond powder .