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根据栅控恒压电晕充电组合反极性电晕补偿充电法的实验结果计算出铁电驻极体的极化强度.结果说明,伴随着薄膜内孔洞气体的Paschen击穿,该铁电体的极化强度随栅压增加而显著上升.利用上述充电方法和热刺激放电(TSD)谱的分析讨论了这类空间电荷型宏观电偶极子,及与其补偿的空间电荷热退极化的电荷动态特性;阐明了这两类俘获电荷的能阱分布,即构成宏观电偶极子的位于孔洞上下介质层内的等值异号空间电荷分别被俘获在深、浅两种能值陷阱内,而位于薄膜表面层的注入空间电荷则被俘获在中等能值陷阱中.
The polarization strength of the ferroelectric electret was calculated according to the experimental results of the grid-connected constant-voltage corona charging combined with the counter-polar corona-compensated charging method. The results show that with the Paschen breakdown of the hole gas in the film, The polarization intensities increase with the increase of gate voltage.We analyze the charge-coupled macroscopical dipoles and their compensated space charge thermal depolarization using the above charging method and thermal stimulation discharge (TSD) The dynamic charge characteristics of these two types of charges are illustrated. The energy well distributions of these two types of trapped charges are elucidated. The isosteric space charge in the upper and lower dielectric layers forming the macro dipole are trapped in the deep and shallow traps respectively , While the space charge injected into the surface layer of the thin film is trapped in the mid-value trap.