对微小尺寸hBN、cBN晶体的电镜观测  

OBSERVATION ON ORIGINAL CRYSTALS OF hBN AND cBN BY EMS

作　　者：张铁臣[1] 于三[1] 郭伟力[1] 刘建廷 邹广田[1] 李冬妹[1] 

机构地区：[1]吉林大学超硬材料国家重点实验室

出　　处：《高压物理学报》1996年第1期76-80,共5页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金资助项目

摘　　要：利用高分辨率（０．２ｎｍ）电子显微镜对经高温高压处理的ｈＢＮ－触媒体系中纳米尺度的产物进行了观察，并通过电子衍射方法确定了其中的ｈＢＮ、ｃＢＮ相。结果表明，ｈＢＮ、ｃＢＮ晶粒在２００～３００ｎｍ尺寸范围内时其自身结构已确定，但其外观不具有各自的晶体特征。推断该种尺寸的晶粒处于成核生长的初期阶段，从热力学公式粗略估算。In the paper,the original products of hBN catalyst system after treatments under high pressure and high temperature were observed by EMS.hBN and cBN phases were determined by method of electron diffrection.The results show that self structure of these crystals is already formed in size 200～300nm.However,characteristic morpholoy of the crystals does not appeared.We guess that the crystals are in original growth.We also deduce that the size of the critical grain of the crystals is about 100nm.

关 键 词：hBN CBN 电镜观测 纳米晶粒 晶体结构 

分 类 号：O766.1[理学—晶体学]