Abstract: 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.

Key words: bioelectret, water molecules, TSDC