STUDY OF WATER ON PIEZOELECTRIC COEFFICIENT d(_33) IN PIG BONES
水对生物驻极体猪骨压电系数d_（33）测量影响的研究

By measuring piezoeldric coeffeicent d33 in pig scapula and pig cartilage, we have investigeted the effect of water on process of piezoelectret of bioelectret and drawn conclusions as followes: water not only affects the measurement of piezoelectric coeffedent, but also plays an imprtant role in taking place of piezoelectret effect. Piezoelectric coeffecient varies according with the conant varies according with the content and existant state of water.