Electrode and interfacial polarization in broadband dielectric spectroscopy measurements
Electrode and interfacial polarization in broadband dielectric spectroscopy measurements
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DOI：
10.1063/1.1364663
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发表时间：
2001-04
影响因子：
1.6
通讯作者：
F. Pizzitutti;F. Bruni
中科院分区：
文献类型：
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作者：
F. Pizzitutti;F. Bruni
在宽带介电谱中，载流子在样品-电极界面处的积累导致大的电极极化掩盖了样品的频率响应。此外，异质样品表现出与组成成分不同的频率依赖性介电和导电特性，产生所谓的麦克斯韦-瓦格纳弛豫。我们在这里提出了一种实验方法来提取真正的样品介电性能的电极样品组件的总频率响应。测试用例（即，冰）证明了所提出的方法的正确性。结果还证实，极化由于阻塞电极是不可忽略的，即使在MHz的频率范围内。
The accumulation of charge carriers at the sample-electrode interface in broadband dielectric spectroscopy results in large electrode polarization masking the frequency response of the sample. Additionally, heterogeneous samples exhibit frequency-dependent dielectric and conductive properties that differ from those of the constituent components, yielding so-called Maxwell–Wagner relaxation. We present here an experimental approach to extract true sample dielectric properties from the total frequency response of the electrode–sample assembly. A test case (i.e., ice) is shown to prove the correctness of the proposed method. Results also confirm that polarization due to blocking electrodes is not negligible even in the MHz frequency range.