不同晶形粗颗粒(0.8mm)金刚石单晶的高温高压合成  

Synthesis of different shape coarse-grained monocrystal diamond at HPHT

作　　者：周升国[1] 马红安[2] 臧传义[1] 刘健[2] 张和民[1] 贾晓鹏[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000 [2]吉林大学超硬材料国家重点实验室,吉林长春130012

出　　处：《超硬材料工程》2008年第2期1-4,共4页Superhard Material Engineering

基　　金：国家自然科学基金(50572032)资助

摘　　要：优质粗颗粒金刚石单晶（尺寸达0．8mm）在制备金刚石工具方面具有重要的应用，其合成条件相对于普通工业金刚石单晶更为苛刻。文章介绍了在具有高精密化控制系统的国产SPD6×1670T型六面顶压机上进行优质粗颗粒金刚石单晶的合成研究。通过采用先进的旁热式组装和粉末触媒技术，并优化了合成工艺，在高温高压条件下（5．4GPa，1300℃～1435℃）成功合成出尺寸为0．8mm（20目）三种不同晶形的粗颗粒金刚石单晶。High quality coarse-grained diamond crystals have significant application for making diamond tools, but the synthesis conditions are more rigorous than general industrial diamond. In this paper, the high quality coarse-grained diamond crystals were synthesized in a China-type SPD6 × 1670T cubic apparatus with highly exact control system. By using advanced indirect heating assembly, powder catalyst technology and optimized synthetic crafts, three kinds of diamond monocrystals with coarse grain size （about 0. 8mm） and different shapes were synthesized successfully at HPHT conditions （5. 4GPa, 1300℃-1435℃）.

关 键 词：金刚石 粗颗粒 高温高压合成 

分 类 号：TQ164[化学工程—高温制品工业]