高温高压下氮化硼的结晶化及立方氮化硼的合成  

THE CRYSTALLIZATION OF BN AND THE SYNTHESIS OF cBN AT HIGH PRESSURE AND TEMPERATURE

作　　者：马贤锋[1] 阎学伟 

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2期97-101,共5页Chinese Journal of High Pressure Physics

基　　金：国家自然科学重点基金

摘　　要：研究了非晶ＢＮ、二维有序ＢＮ和低有序度六方ＢＮ（Ｇ．Ｉ＝６．１）在高温高压下的结晶行为及不同有序度的ＢＮ对立方ＢＮ合成的影响。研究结果表明，低有序度ＢＮ向高有序度六方相转化，但不同有序度的ＢＮ原料向立方ＢＮ转化的行为不同。少量Ｂ掺杂下的立方氮化硼的合成实验发现Ｂ的掺入阻碍立方ＢＮ的生成。低有序度ＢＮ不易向立方ＢＮ的主要原因可以认为是它们存在较多的Ｎ空位，高温高压下随着ＢＮ的结晶化。The crystallization of amorphous,turbostratic and low crystalline degree hexagonal BN was found at high pressure and temperature and the conversion behavior of various BN with different crystallinity to cBN was studied.Results show that the synthesis of cBN is getting difficult as the crystallinity of starting BN material becomes worse.(i.e. G.I value increase).When synthesizing cBN using hexagonal BN doped with B,we found that B can hinder the conversion to cBN.The existence of high nitrogen vacancies in low crystallinity BN may explain why it is difficult to transform to cBN.When BN crystallizes at high pressure and temperature,boron escapes which hinders the conversion of hBN to cBN.

关 键 词：有序度 高温 高压 结晶化 氮化硼 

分 类 号：O522.2[理学—高压高温物理] O613.81[理学—物理]