| 交流阻抗谱法及其在地球深部物质科学中的应用 |
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| 引用本文： | 王多君,易丽,谢鸿森,李和平.交流阻抗谱法及其在地球深部物质科学中的应用[J].地学前缘,2005,12(1):123-129. |
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| 作者姓名： | 王多君 易丽 谢鸿森 李和平 |
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| 作者单位： | 中国科学院,地球化学研究所,贵州,贵阳,550002;中国科学院,地球化学研究所,贵州,贵阳,550002;中国科学院,地球化学研究所,贵州,贵阳,550002;中国科学院,地球化学研究所,贵州,贵阳,550002 |
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| 基金项目： | 国家高技术研究发展计划(863计划);中国博士后科学基金;中国科学院知识创新工程项目 |
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| 摘 要： | 交流阻抗谱对于表征地球深部物质的电学性质以及电极界面性质是一种比较新的而且是强有力的工具。它可以用来调查各种固体、流体内部以及界面的束缚和移动电荷的动力学。文中介绍了交流阻抗谱的基本原理以及常用的数据处理方法。对交流阻抗谱在不同的物质体系———矿物单晶、矿物多晶(岩石)、电解质溶液、岩石破裂、熔体中的表现形式进行了研究,并且给出相应导电机制的等效电路模型。研究结果发现,对于矿物单晶和矿物多晶在最高频率段的导电机制由颗粒内部引起;最低频率段的导电机制由电极界面所引起;而矿物多晶中间频率段的导电机制由颗粒边界所引起。对于电解质溶液,最高频率段的导电机制由电解质溶液所引起,而低频率段的导电机制由溶液电极界面所引起。交流阻抗谱对于检测岩石破裂和部分熔融中熔体的分布及数量都非常灵敏。
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| 关 键 词： | 交流阻抗谱 矿物和岩石 电解质溶液 熔体 岩石破裂 |
| 文章编号： | 1005-2321(2005)01-0123-07 |
| 修稿时间： | 2005年1月14日 |
Impedance spectroscopy and its application to material science of the Earth's interior |
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| WANG Duo-jun,YI Li,XIE Hong-sen,LI He-ping.Impedance spectroscopy and its application to material science of the Earth's interior[J].Earth Science Frontiers,2005,12(1):123-129. |
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| Authors: | WANG Duo-jun YI Li XIE Hong-sen LI He-ping |
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| Abstract: | The impedance spectroscopy is a relatively new and powerful method for characterizing the electrical properties of deep earth materials and their interfaces with electrodes. It may be used to investigate the dynamics of bound or mobile charge in the bulk or interfacial regions of any kind of solid or liquid material. We introduce the basic theory of the impedance spectroscopy and several types of models used in describing, modeling, and interpretation of impedance data. Using impedance spectroscopy, we study the different frequency-dependent electrical response of single and polycrystalline minerals, electrolytic solution, melts, and fractures in rocks. We give equivalent circuits of these systems. In both single and polycrystalline samples, the highest-frequency conducting mechanism is interpreted as bulk (grain interior) conduction, and the lowest-frequency mechanism is attributed to sample-electrode interface effects. In polycrystalline samples, the intermediate-frequency mechanism is interpreted as the grain-boundary conduction mechanism. In the electrolytic solution, the highest-frequency mechanism is interpreted as bulk conduction, and the lowest-frequency mechanism is attributed to sample-electrode interface effects. The impedance spectroscopy is sensitive to the fractures, the distribution and the fraction melts of rocks. |
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| Keywords: | AC impedance spectroscopy mineral and rocks electrolytic solution melts fracture |
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