添加剂Li_8SiN_4对cBN晶体形貌的影响  

EFFECTS OF ADDITIVE Li 8SiN 4 ON cBN CRYSTAL MORPHOLOGY

作　　者：周艳平[1] 阎学伟[1] 马贤锋[1] 赵廷河 谢云芬[1] 

机构地区：[1]中国科学院长春应用化学研究所

出　　处：《高压物理学报》1996年第1期56-62,共7页Chinese Journal of High Pressure Physics

基　　金：国家自然科学重点基金资助

摘　　要：在４．５～５．０ＧＰａ，１５００～１８００℃范围内，在Ｌｉ基复合氮硼化物的催化体系中添加Ｌｉ８ＳｉＮ４后，得到了具有光泽的棕色透明的ｃＢＮ单晶。研究了ｃＢＮ晶体的形貌，结果表明，添加Ｌｉ８ＳｉＮ４后得到的等积形ｃＢＮ晶体的百分比明显增多，除部分截角四面体外，多为截角八面体晶体，且棱角尖锐。After adding Li 8SiN 4 into the catalytic system of Li complex borom nitrides,the glossy transparent cBN brown crystals were synthesized under the conditions of high pressure and high temperature in the range 4.5～5.0GPa and 1500～1800℃ respectively.The morphology of cBN crystals is studied.The result shows that the percentage of blocky cBN crystals synthesized with Li 8SiN 4 increase obviously,and except the partial tuncated tetragonal erystals,the most of them are tuncated octahedral crystals.The edges and corners of cBN crystals are accurate and sharp,and surfarces of them are dense and smooth.

关 键 词：Li8SiN4 CBN 形貌 等积形 晶体 

分 类 号：O766.1[理学—晶体学]