铁电粉粒的介电测量

Dielectric Properties Measurement of Ferroelectric Powder

用理论模型说明了铁电微晶粉料在铁电转变中不显露出宏观的介电常数居里峰 .对钛酸钡粉粒的测量证实了理论结果 .实验表明 ,TSC测量可觉察粉料的极性转变 .在经历顺电至铁电相变后 。

A theoretical model is applied to explain the phenomenon that ferroelectric powder don't appear microscopic dielectric constant curie peak during ferroelectric phase transition process, and the theoretical result is confirmed by the experiment of BT powder. But using TSC measurement can detect the polar transition of powder. When powder change from parelectric to ferroelectric , there appear clusters between crystallite by the action of spontaneous polarization.