Thermal Currents and the Internal Polarization in Carnauba Wax Electrets
Thermal Currents and the Internal Polarization in Carnauba Wax Electrets
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DOI：
10.1063/1.1660602
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发表时间：
1971-06
影响因子：
3.2
通讯作者：
M. Perlman
中科院分区：
文献类型：
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作者：
M. Perlman
热流已获得从巴西棕榈蜡驻极体使用线性加热速率为各种极化场，温度，时间和厚度的样品。极化被证明是均匀的，因此，空间电荷，从电极或宏观离子位移的电荷注入所产生的，被排除作为可能的原因的异质电荷。偶极取向的情况下进行检查，它表明，太多的偶极子必须对齐，以产生所观察到的效果。微观位移离子捕获提出的异质电荷机制。该模型与观测到的热流的温度依赖性是一致的，并且似乎与任何实验事实都不矛盾。热电流谱由三个重叠峰组成，活化能分别为1.7、2.3和2.7 eV，最大温度分别为47°、59°和69°C。在所提出的模型中，这些活化能将与离子相关联……
Thermal currents have been obtained from carnauba wax electrets using a linear heating rate for various polarization fields, temperatures, times, and thickness of samples. The polarization is shown to be uniform, and hence space charges, resulting from either charge injection from the electrodes or macroscopic ion displacement, are ruled out as possible causes of the heterocharge. The case for dipole orientation is examined and it is shown that far too many dipoles must be aligned to produce the observed effects. Microscopic displacement of ions with trapping is proposed as the heterocharge mechanism. This model is consistent with the observed temperature dependence of the thermal currents, and does not appear to contradict any of the experimental facts. The thermal‐current spectra consist of three overlapping peaks with activation energies of 1.7, 2.3, and 2.7 eV and temperature maxima of 47°, 59°, and 69°C, respectively. In the proposed model, these activation energies are to be associated with the ioni...