利用特殊的陶瓷烧结方法制备了铅基弛豫铁电体0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3和Pb(Zn1/3Nb2/3)O3基陶瓷.铅基弛豫铁电体PMNT、PZN的弛豫过程可用修正的玻璃局域冻结模型描述.在微畴-宏畴转变过程中,铁电体的结构起伏引起弛豫性;弛豫铁电体结构起伏程度越大,弛豫性越低;随微畴增大,铁电体的弛豫特性减弱直至消失.
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