Ploss Bernd, Krause Markus
Department SciTec, University of Applied Sciences (FH) Jena, Germany.
IEEE Trans Ultrason Ferroelectr Freq Control. 2007 Dec;54(12):2479-81. doi: 10.1109/TUFFC.2007.563.
A substantial improvement in the performance of pyroelectric 0-3 composites of ceramic particles in a polymer matrix has been achieved by doping the polymer matrix material. Readily prepared and polarized films with various volume fractions of lead zirconate-titanate (PZT) particles in polyurethane have been doped in a solution of lithium perchlorate in acetone to increase the conductivity. With an appropriate conductivity, the dielectric permittivities of the ceramic particles and the polymer matrix become matched, resulting in an improvement of the pyroelectric coefficient from about 6 microC/(m(2)K) to about 50 microC/(m(2)K). The experimental results are explained by theoretical predictions.
通过对聚合物基体材料进行掺杂，陶瓷颗粒在聚合物基体中的热释电0-3复合材料的性能得到了显著改善。在聚氨酯中含有不同体积分数锆钛酸铅（PZT）颗粒的易于制备和极化的薄膜，已在高氯酸锂的丙酮溶液中进行掺杂以提高导电性。具有适当的导电性时，陶瓷颗粒和聚合物基体的介电常数相匹配，导致热释电系数从约6微库仑/（平方米·开尔文）提高到约50微库仑/（平方米·开尔文）。实验结果由理论预测进行了解释。
