高温高压下微斜长石的阻抗谱实验研究

人工晶体学报, 2011, 40(1): 284-289.

高温高压下微斜长石的阻抗谱实验研究

1.中国科学院地球化学研究所地球深部物质与流体作用地球化学实验室,贵阳,550002;中国科学院研究生院,北京,100049

2.中国科学院地球化学研究所地球深部物质与流体作用地球化学实验室,贵阳,550002

3.中国科学院地球化学研究所地球深部物质与流体作用地球化学实验室,贵阳,550002;Department of Earth and Planetary Sciences,Tokyo Institute of Technology,2-12-1 Ookayama,Meguro,Tokyo 152-8551,Japan

4.中国科学院地球化学研究所地球深部物质与流体作用地球化学实验室,贵阳,550002

基金项目: 中国科学院知识创新重要方向项目(KZCX2-YW-Q08-34;KZCX2-YW-QN110) 国家自然科学基金(40704010;40974051)

关键词：微斜长石 , 高温高压 , 电导率 , 导电机制

Experimental Study on Impedance Spectra of Microcline under High Temperature and High Pressure

在1.0～3.0GPa,673～973K和10(-1)～10(6)Hz条件下,利用交流阻抗谱实验技术,首次对微斜长石[K(0.73)Na(0.16)Ca(0.09)(0.98)AlTi(0.01),Si(2.99)O8]电导率进行原位测量.实验结果表明:样品的复阻抗的模和相角对频率有很强的依赖性;样品电导率随着温度升高而增大,电导率的对数和温度的倒数之间关系符合Arrhenius线性关系;微斜长石电导率随着压力升高而降低,而活化焓随之增加;离子导电机制对高温高压下微斜长石的导电行为给予了合理的解释.

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