Electrical conductivity of carbon blacks under compression
Electrical conductivity of carbon blacks under compression
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DOI：
10.1016/j.carbon.2004.10.045
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发表时间：
2005-01-01
期刊：
影响因子：
10.9
通讯作者：
Gómez-Serrano, V
中科院分区：
文献类型：
--
作者：
Sánchez-González, J;Macías-García, A;Gómez-Serrano, V
对6种商品炭黑在压缩条件下的电导率进行了研究。考察了施加压力、样品体积、机械功和碳密度对反应的影响。在室温下，用阻抗谱法在20-10(6)Hz的频率范围内测量电导率，电压为1V。压缩下体积的减少很大程度上取决于每个特定的碳和施加的压力，对于大量的碳来说，只有在低压下才重要。电导率随压力和机械功的变化规律相似。在机械功对电导率的影响所包含的压力和体积效应中，压力的影响似乎占主导地位。对于压缩体积较小的碳，随着样品体积的减小，电导率的增加更大。电导率的总增长在密度最大的碳中最大，在最轻的碳中最小。电导率及其在压缩下的变化与碳的密度呈正相关。(C) 2004 Elsevier Ltd.版权所有。
A study was made of the electrical conductivity of six commercial carbon blacks under compression. The influence of the applied pressure, sample volume, mechanical work, and density of the carbons was investigated. The conductivity was measured at room temperature by impedance spectroscopy over the frequency range 20-10(6) Hz with a voltage of 1V. The decrease in volume under compression depended significantly on each particular carbon and on the applied pressure, and for a larger number of carbons it was only important at low pressures. The patterns of variation of the conductivity with pressure and mechanical work were similar. Of the pressure and volume effects comprised in the influence of mechanical work on the conductivity, that of the pressure appeared to predominate. The increase in conductivity with decreasing sample volume was greater for the carbons in which the volume under compression was smaller. The total increase in conductivity was greater for the densest carbons and least for the lightest one. Both the conductivity and its variation under compression were positively related to the density of the carbons. (C) 2004 Elsevier Ltd. All rights reserved.