【硅酸盐学报】干福熹中国硅酸学会北京.pdf
China Glass8th China l Glass Industrial Technical Exhibition ChinaWorldTradeCenter,Beijing,April5-8,2000 Organizer:Chinese Ceramic Society Co-Organizer:ChinaNational Associationfor GlassIndustry Sponsors:StateAdministration of BuildingMaterialsIndustryMinistry of Information In
JOURNALOFTHECHINESECERAMICSOCIETY(GuisuanyanXuebao)(A Bimonthly Journal of the Arts and Sciences of Ceramics)Total NOctober,1999 VolNo CONTENTS Study of Stability of EffectiveDielectric Constant ofRelaxorFerroelectrics Under BiasedVoltage YuanZhanheng,SunHaijun,ZhangLiangying,YaoXi
514 硅酸盐学报 1999年 1弛豫型铁电陶瓷的介电特征 弛豫型铁电体的“顺电一铁电”相变是逐渐变化,而不是突变,表现在介电常数与温度的关 系曲线上是一展宽了的峰值区.高于Curie温度时仍存在“自发极化”.弛豫型铁电体和一般铁 电体不同点是有可调的Q-V关系和电滞回线.这就是说,弛豫型铁电体在某个偏压值以 下,有可能实现有效介电常数不变.但由于电滞回线的存在,当过置偏压时,马上又在低于此 偏置电压以下测量或加讯号工作时,其有效介电常数和单向准确置偏电压点上的有效介电常 数不同. 
