摘要
对天然含Cr尖晶石,在T=300—603K,P=0—12.82GPa条件下,在中国科学院高能物理研究所同步辐射实验室高压站,利用外加温金刚石压腔装置(DAC),进行了能量色散X射线粉末衍射(EDXD)原位测量,获得了天然含Cr尖晶石随压力和温度变化的衍射图谱。通过指标化公式对衍射图谱进行分析,得到了尖晶石的晶胞参数及其随压力、温度的变化,进而利用Mumaghan方程得到P-V状态方程和体积模量、压缩系数及热膨胀系数等。
Energy dispersive X-ray powder diffraction (EDXD) of natural chromium-bearing spinel collected from Damapin using synchrotron radiation has been in situ measured under high pressure(0—12.82 GPa) and high temperature (300—603 K) conditions. Based on Mumaghan equation, the state equation of natural chromium-bearing spinel was deduced, the bulk modulus K_T(0)=369 Gpa and compression coefficient K=2.713×10^(-3)/Gpa were obtained. In addition, the thermal expansion of spinel was discused, and a thermal expansion coefficient of α=1.004×10^(-5)/K was calculated.
出处
《核技术》
CAS
CSCD
北大核心
2004年第12期931-934,共4页
Nuclear Techniques
基金
中国科学院知识创新项目(KJCX2-SW-N03)
国家自然科学基金(40304005)
基金重大项目(10299040)
关键词
尖晶石
金刚石压腔装置
同步辐射
能量色散X射线粉末衍射
Spinel, Diamond anvil cell, Synchrotron radiation, Energy dispersive X-ray powder diffraction
