We have compared measurements of a set of polyethylene terephthalate (PET) electret samples by means of pulsed electroacoustic method (PEA) and thermally stimulated depolarization current (TSDC) techniques. Samples where the $\alpha$ or the $\rho$ relaxation is activated show uniform polarization and image charge at the electrodes. Different electrode configurations have been tested when external charge carriers are injected into the sample. In these experiments, differences in TSDC spectra are explained by the different blocking behavior of the electrodes. All in all, PEA in combination with TSDC turns out to be a useful technique in the study of thermally poled electrets.

我们通过脉冲电声法 (PEA) 和热刺激去极化电流 (TSDC) 技术比较了一组聚对苯二甲酸乙二醇酯 (PET) 驻极体样品的测量结果。样品在哪里$\alpha$或者$\rho$弛豫被激活，在电极处显示出均匀的极化和图像电荷。当外部电荷载流子注入样品时，已经测试了不同的电极配置。在这些实验中，TSDC 光谱的差异可以通过电极的不同阻塞行为来解释。总而言之，PEA 与 TSDC 相结合成为研究热极化驻极体的有用技术。