High-temperature perovskite relaxor ferroelectrics: A comparative study
High-temperature perovskite relaxor ferroelectrics: A comparative study
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DOI：
10.1063/1.2537753
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发表时间：
2007-03
影响因子：
3.2
通讯作者：
C. Stringer;T. Shrout;C. Randall
中科院分区：
文献类型：
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作者：
C. Stringer;T. Shrout;C. Randall
最近发现的基于Bi（Me′Me″）O3-PbTiO 3溶液的高温压电陶瓷也允许开发具有三元固溶体的高温弛豫铁电体。基于xBiScO 3-yPb（Mg 1 scin 3 Nb 2 scin 3）O3-zPbTiO 3（xBS-yPMT-zPT）三元体系的一种高温组合物表现出高介电常数最大值为17000，Tmax为500-550 K。这些材料相比，复杂的铅钙钛矿弛豫铁电体的活化能，EA，和冻结温度，Tf，从Vogel-Fulcher关系，也是一个高温偏离温度，TD，从居里-外斯行为的测定。结果发现，这些参数的规模内的钙钛矿弛豫系统，并从这些定义参数的自洽趋势。有人建议，弛豫铁电体的一般比较可能存在。最高的EA，Tf，和TD值都存在于xBS-yPMT-zPT三元系内的弛豫铁电体。
The recent discovery of high-temperature piezoelectric ceramics based on Bi(Me′Me″)O3-PbTiO3 solutions have also permitted the development of high-temperature relaxor ferroelectrics with ternary solid solutions. One of the high-temperature compositions based on the xBiScO3-yPb(Mg1∕3Nb2∕3)O3-zPbTiO3 (xBS-yPMT-zPT) ternary system exhibited a high permittivity maxima of ∼17 000 and a Tmax of 500–550 K. These materials are compared to complex lead perovskite relaxor ferroelectrics by determination of the activation energy, EA, and freezing temperature, Tf, from the Vogel-Fulcher relationship and also a high-temperature deviation temperature, TD, from the Curie-Weiss behavior. It was found that these parameters scale within the perovskite relaxor systems and from the self-consistent trends of these defining parameters. It is suggested that a general comparison for relaxor ferroelectrics may exist. The highest EA, Tf, and TD values all exist within the xBS-yPMT-zPT ternary system within the relaxor ferroelectri...