新工艺提纯超细金刚石微粉的效果评价研究  

Research on the effect estimantion of diamond powder purification method

作　　者：潘勇[1] 侯书恩[1] 林克英[1] 肖红艳[1] 

机构地区：[1]中国地质大学纳米科技中心,武汉430074

出　　处：《金刚石与磨料磨具工程》2006年第4期4-7,共4页Diamond & Abrasives Engineering

摘　　要：通过对人造金刚石微粉进行提纯研究,提出了一种全新的提纯工艺:在强酸介质中利用超声波分散,中温高压的密闭体系中反应。国家发明专利公开号为CN 1693188A。借助TG-DSC、XRD和激光拉曼光谱等测试方法对提纯前后的金刚石微粉进行对比分析,结果表明提纯后的超细金刚石微粉热稳定性提高近30℃;XRD图谱上无非金刚石物相衍射峰,提纯前后的晶体粒度根据X射线衍射理论,晶粒粒度变小引起衍射峰宽化,应用Scheer公式进行计算,晶体粒径变化不大;激光拉曼光谱显示石墨几乎被完全除去,并且获得的超细金刚石微粉在1000℃灼烧,不可燃残留物小于0.05%以及最有害成分S iO2的含量小于0.01%,是目前提纯超细金刚石微粉的一种行之有效的方法。In this paper,a new purification method which is patented （patent number CN 1693188A） is introduced. Ultrasonic method was used to disperse the reaction system in the strong acid under the sealed condition of a mid - temperature high-pressure. Using TG - DSC, XRD and Laser - Raman spectrum, diamond powders were analyzed. Thermal stability of ultra fine diamond powders purified was increased by about 30℃ ; and the only crystal phase is diamond existing in XRD. Based on the theory of the X - ray diffraction, crystal particles becoming little lead to wide diffraction peak; and by Scheer formula, there is little change in particles size. There is no peak of graphite in Laser - Raman spectrum. When burning at 1000 ℃, the incombustible residua is less than 0.05%, the most harmful impurity, SiO2 , less than 0.01%. The new method is an efficiency purification method.

关 键 词：超细金刚石 提纯 

分 类 号：TQ164[化学工程—高温制品工业]