生物驻极体极化弛豫特性的热刺激电流分析

Analysis of Dielectric Relaxation Characteristics by TSDC in Bioelectret

采用热刺激电流的方法，以猪的肩胛骨为例，对生物体的驻极效应进行了研究，并由此对生物驻极体的极化弛豫特性作了分析．实验表明，复杂的有机生命体中存在着显著的电荷储存效应，产生这一效应的基本原因在于生物体胶原纤维和基质细胞中的结合水及生物体内少量可动载流子，从单一频率弛豫进行计算所得的ＴＳＤＣ谱图与测量结果基本一致，说明其弛豫过程主要对应于单一频率的水分子的极化弛豫．

Using pig bone as an example, the dielectric characteristic of bioelectret has been analyzed by the method of TSDC (Thermally Stimulated Depolarization Current). The experiment results showed that there is a strong dielectric effect in animal bones. It is mainly caused by the water molecules bound in gelatin fibers and basal cells and affected by the minor mobile carriers in the bone. Compared the spectrum by computation with that by experiment, the forms of spectrum are similar. It showed that the single frequency relaxation in the bioelectret is mainly caused by the bound water.