Fe-C(H)系高温高压合成金刚石多晶的RAMAN与PL光谱研究  

RAMAN and PL spectra studies of the HPHT synthetic polycrystalline diamond from Fe-C(H) system

作　　者：杨志军[1] 刘小雨[1] 林峰[2] 梁榕[1] 彭明生[1] 李红中[1] 

机构地区：[1]中山大学地球科学系,广东广州510272 [2]桂林矿产地质研究院国家特种矿物材料工程技术研究中心,广西桂林541004

出　　处：《超硬材料工程》2009年第6期4-8,共5页Superhard Material Engineering

基　　金：国家自然科学基金项目(编号:40502007;40940013);广东省自然科学基金项目(编号:9151027501000088);中山大学重点培育计划项目(编号:32110-1132291)资助

摘　　要：Fe-C(H)系高温高压合成金刚石多晶的FESEM,RAMAN和PL光谱研究表明:构成多晶的金刚石晶粒多为八面体形态,同时其形成环境比较稳定。在金刚石晶粒中存在与氮相关、与镍相关及塑性形变等缺陷,且不同金刚石晶粒中的缺陷不完全相同。基于镍易在金刚石中形成发光中心及氢可以加速金刚石多晶的形成,为了提高金刚石单晶的质量,应该尽量在压腔中使用纯铁作为触媒,且在引入氢的同时除氮。The results of FESEM, RAMAN and PL spectra characterization of the polycrystalline diamonds synthesized from Fe-C（H） system show the diamond grains have octahedral habit and stable growth environment. There are nitrogen-related, nickel-containing defects and plastic deformation which are inhomogeneous in different diamond grains. Hydrogen can accelerate the formation of polycrystalline diamond. At the same time, in order to improve the quality of diamond crystals, the pure iron catalyst should be recom- mended and nitrogen should be eliminated when hydrogen was introduced to the anvil cell.

关 键 词：金刚石多晶 RAMAN PL Fe-C(H)系 

分 类 号：TQ164[化学工程—高温制品工业]