Evidence of macro–micro domain transition in poled PMN–PZT ceramics
Evidence of macro–micro domain transition in poled PMN–PZT ceramics
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DOI：
10.1016/j.ceramint.2013.05.044
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发表时间：
2013-12
影响因子：
5.2
通讯作者：
G. Du;R. Liang;Junxia Wang;Li Wang;Wenbin Zhang;Genshui Wang;Xianlin Dong
中科院分区：
文献类型：
--
作者：
G. Du;R. Liang;Junxia Wang;Li Wang;Wenbin Zhang;Genshui Wang;Xianlin Dong
研究了极化前后Pb0.88Ba0.06Sr0.06结果表明，极化后，薄膜的介电常数增大，损耗角正切减小。极化陶瓷的介电常数和损耗角正切响应的频率无关的突变进行了观察。这种异常行为被认为是与宏-微畴转变和相应的热释电测量表现出正常弛豫转变温度Tnr的窄峰。此外，在温度略高于Tnr时出现的双回线状磁滞现象和两种电流峰也证明了这一转变。
The dielectric properties of unpoled and poled Pb0.88Ba0.06Sr0.06(Mg1/3Nb2/3)0.37Zr0.375Ti0.255O3(modified PMN–PZT) ceramics were investigated. It was found that the dielectric constant increased while the loss tangent decreased after poling. A frequency independent abrupt transition in the dielectric constant and loss tangent responses was observed for the poled ceramics. This abnormal behavior was believed to be correlated with the macro–micro domain transition and the corresponding pyroelectric measurement exhibited a narrow peak at the normal-relaxor transition temperatureTnr. Furthermore, the presence of double-loop-like hysteresis and two types of current peaks at a temperature slightly higher thanTnrshowed another strong evidence of this transition.