基于离子阻挡法测量电子-离子混合导体中离子电导率的研究（英文）

发布时间：2018-07-10 01:13

本文选题：热电材料 + 离子电导率　；参考：《无机材料学报》2017年12期

【摘要】：近年来,具有诸多新的物理性质和优良热电性能的类液态材料获得了研究人员的广泛关注。离子电导率对理解这类热电材料中的离子迁移行为非常关键。但是,由于类液态热电材料中的离子电导率在总电导率中的贡献很小,因此很难利用传统方法精确测量其离子电导率。本研究基于Yokota提出的离子阻挡法,尝试利用自主搭建的设备测量类液态热电材料的离子电导率。本文详细介绍了该设备的基本构造、测试原理以及测试步骤,分析了帕尔贴效应/塞贝克效应、离子析出、电压测试点的位置和氧化挥发等因素对测试准确性的影响,并提出了相应的解决方案,成功测量了几种具有代表性的类液态热电材料的离子电导率。
[Abstract]:In recent years, liquid-like materials with many new physical properties and excellent thermoelectric properties have attracted wide attention. Ionic conductivity is very important to understand the ion migration behavior in this kind of thermoelectric materials. However, due to the small contribution of ionic conductivity in liquid-like thermoelectric materials to the total conductivity, it is difficult to accurately measure the ionic conductivity by traditional methods. Based on the ion barrier method proposed by Yokota, this paper attempts to measure the ionic conductivity of liquid thermoelectric materials by self-built equipment. In this paper, the basic structure, testing principle and testing procedure of the equipment are introduced in detail, and the effects of Palpater effect / Seebeck effect, ion precipitation, location of voltage test point and oxidation volatilization on the accuracy of the test are analyzed. The corresponding solutions were proposed and the ionic conductivity of several representative liquid-like thermoelectric materials was successfully measured.
【作者单位】：中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室;中国科学院大学;
【基金】：National Science Fund for Distinguished Young Scholars(51625205) National Natural Science Foundation of China 51402337,51472262)
【分类号】：TB302

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