纳米硫化锌球壳的高压相变研究  

Pressure Induced Phase Transition of Nano Zinc Sulfide Shell

作　　者：王霖[1] 刘冰冰[1] 王卉[1] 侯元元[1] 艾晓雷[1] 潘跃武[1] 崔启良[1] 邹广田[1] 刘洪江[2] 倪永红[2] 徐正[2] 李延春[3] 李晓东[3] 刘景[3] 

机构地区：[1]吉林大学超硬材料国家重点实验室,吉林长春130012 [2]南京大学配位化学国家重点实验室,江苏南京210093 [3]中国科学院高能物理研究所,北京100023

出　　处：《高压物理学报》2005年第4期357-360,共4页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(10204010);教育部科技创新工程重大项目培育资金项目;高等学校博士点专项基金;跨世纪优秀人才培养计划;国家重点基础研究发展计划(2005CB724400);吉林省科技发展计划资助项目

摘　　要：采用同步辐射能量色散X射线衍射(EDEX)技术和金刚石对顶砧高压装置,对纳米硫化锌球壳进行了原位高压X射线衍射实验。最高压力达33.3 GPa。常压下纳米硫化锌球壳为纤锌矿结构和闪锌矿结构共存的混相结构。压力达到11.2 GPa时,纳米硫化锌空心球中的纤锌矿结构全部转变为闪锌矿结构。压力达到16.0 GPa时,发生了由闪锌矿结构向岩盐矿结构的相变,在17.5 GPa和21.0 GPa时分别出现未知峰,33.3 GPa时基本完全转变为岩盐矿结构。两个相变均为可逆相变。In situ energy dispersive X-ray diffraction measurements on nano zinc sulfide shell have been carried out by using diamond anvil cell with synchrotron radiation. The highest pressure is 33.3 GPa in the experiment. The raw materials contain two structures of ZnS, which are wurtzite and zinc blende respectively. With increasing pressure, the wurtzite structre was transformed to zinc blende structure at 11.2 GPa. A phase transition from zinc blende structure to rocksalt structure occurred as the pres- sure reached to 16.0 GPa. Two unknown diffraction peaks were found in the range of pressure from 17.5 GPa to 21.0 GPa. The rocksalt structure existed as the pressure reached to 33.3 GPa. Both of the phase transitions are reversible.

关 键 词：纳米硫化锌球壳 同步辐射 高压 相变 

分 类 号：O521.23[理学—高压高温物理]