AgI的高压电学性质  

Electrical Property of AgI under High Pressure

作　　者：杨晓翠[1] 张立新[2] 郝爱民[2,3] 杨洁[4] 高春晓[3] 邹广田[3] 

机构地区：[1]白城师范学院物理系,吉林白城137000 [2]河北科技师范学院数理系,河北秦皇岛066004 [3]吉林大学超硬材料国家重点实验室,长春130012 [4]空军航空大学基础部,长春130022

出　　处：《吉林大学学报（理学版）》2009年第1期102-106,共5页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:4047303440404007);国家重点基础研究发展计划973项目基金(批准号:2005CB724404)

摘　　要：利用在金刚石对顶砧上集成的微电路，高压原位测量了AgI的电导率，实验观察电导率随压力的变化规律，并在不同压力下，测量了岩盐相结构AgI的电导率随温度（293～443K）的变化关系，实验结果表明，In（σT）与10^3T^-1近似呈线性关系．计算了传导离子浓度和Frenkel缺陷扩散的激活能，并测量了KOH型结构AgI的电导率与温度和压力间的关系，得到压力高于20GPa时的能隙与压力关系．In-situ conductivity measurement of AgI under high pressure and ambient temperature was carried out via fabricated microcircuit on diamond anvil cell （DAC）. It was observed that conductivity changed with the increasing pressure. The temperature and pressure dependences of conductivity in rs-AgI were studied under several pressures at temperatures from 293 K to 443 K. The experimental data show the plot of ln（σT） versus 10^3 T^-1 is approximately linear. The ionic carries concentration and activation energy for defect transport were calculated. And also, we investigated the temperature and pressure dependences of conductivity in KOHtype AgI and obtained the relation between energy gap and pressure.

关 键 词：电导率 高压 超离子传导 

分 类 号：O521.21[理学—高压高温物理]