Purification of Ultrafine Diamond Synthesized by Detonation

爆轰合成超微金刚石的提取方法(英文)

Ultrafine diamond (UFD) is produced at high pressure and high temperature generated by explosive detonation. We manage to search for a new technology to purify the UFD by using potassium permanganate and concentrated sulfuric acid as oxidant. The experiment results show that, compared with others, the purifying effect by this technology is satisfactory and is a more efficient, cheaper, and safer purification technology with less pollution and less investment. It can be put into commercial use. The related principle of the technology is discussed. It is believed that the atomic state oxygen produced during the reaction mechanism is an active substances which would react with the graphite——the main impurity existing in the detonation soot, and the reaction temperature is the key factor in the process.

用爆轰法合成超微金刚石 (UFD) ,用高锰酸钾和浓硫酸作氧化剂探索提纯UFD新工艺 ,达到了传统使用高氯酸工艺相同的提纯效果 ,而且具有高效、经济、安全和对环境污染小的优点 ,便于推广应用 .根据电化学和化学动力学基本原理对氧化提纯工艺原理进行了分析探讨 ,认为氧化反应过程中生成的原子态氧是与爆轰灰中的主要杂质石墨发生作用的活性物质 ,反应温度是该提纯反应的关键影响因素 。