A new method for determining the d.c. conductivity of powdered materials

A new method for determining the d.c. conductivity of powdered materials
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确定直流电的新方法

DOI:
10.1016/j.nocx.2021.100066
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发表时间:
2021
期刊:
Journal of noncrystalline solids
影响因子:
--
通讯作者:
C. Austen Angell, Ranko Richert
C. Austen Angell, Ranko Richert
中科院分区:
--
文献类型:
--
作者:
C. Austen Angell, Ranko Richert

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参考文献

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测量非液体或整体固体样品的直流离子电导率通常存在问题。在这里,我们展示了如何确定粉末玻璃的直流离子电导率可以重现使用交流单片材料的电导率。在一个密封的NMR管中包含的样品上的测量,其中结构特征可以被顺序地确定。虽然我们在这里开发的技术已经过验证测试,并验证了对大块Li+离子传导玻璃进行的直流离子电导率测量,但我们开发的方法应该对结晶和非晶样品都有效。该技术的巨大优点是,它消除了生产所研究的粉末压制颗粒的需要,并且这样做完全避免了通常非常困难和耗时的曲线拟合过程,典型地,复杂和回旋的复阻抗平面弧,以分别确定体和晶间晶界阻抗。
The measurement of d.c. ionic conductivity in samples that are not liquids or monolithic solids generally presents a problem. Here we show how the d.c. ionic conductivity determined for a powdered glass can reproduce the conductivity of the monolithic material using a.c. measurements on a sample contained in a sealed NMR tube, in which the structural characteristics can be sequentially determined. While the technique we have developed here has been proof tested and verified against d.c. ionic conductivity measurements made on bulk pieces of Li+ion conducting glasses, the methodology we have developed should be valid for both crystalline and amorphous samples. The tremendous advantage that this technique presents is that it obviates the need to produce pressed pellets of powders under study and in doing so completely avoids the often very difficult and time consuming process of curve fitting the, typically, complicated and convoluted complex impedance plane arcs to separately determine the bulk and intergranular grain boundary impedances.
在多元醇的介电响应中观察到缓慢的德拜型峰。
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