Correlation between microstructure, strain behavior, and acoustic emission of soft PZT ceramics
Correlation between microstructure, strain behavior, and acoustic emission of soft PZT ceramics
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DOI：
10.1016/s1359-6454(01)00025-8
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发表时间：
2001-04-19
期刊：
影响因子：
9.4
通讯作者：
Lupascu, DC
中科院分区：
文献类型：
--
作者：
Hoffmann, MJ;Hammer, M;Lupascu, DC
研究了晶粒尺寸和畴结构对软质锆钛酸铅（PZT）陶瓷微观和宏观机电性能的影响。细晶粒和粗晶粒PZT陶瓷的平均晶粒尺寸为1.5和3.5 μ m的制备使用常规的混合氧化物路线和不同的烧结，条件（1225 degreesC/2小时和1300 degreesC/10小时）。在具有不同Zr/Ti比的PZT上进行实验，以获得纯四方体（45/55）、纯菱面体（60/40）和准同型体（54/46）组合物。为了区分内在和外在的影响，微观应变测量（同步辐射X射线衍射）进行了比较与宏观测量的机械滞后回线。这些结果与声发射测量相关，声发射测量在微观上反映了不同晶体学修饰对宏观应变的内在和外在贡献。(C)2001 Acta Materialia Inc.由Elsevier Science Ltd.出版，版权所有。
The influence of grain size and domain configuration on the microscopic and macroscopic electromechanical properties of soft lead zirconate titanate (PZT) ceramics were studied. Fine- and coarse-grained PZT ceramics with an average grain size of 1.5 and 3.5 mum were prepared using the conventional mixed oxide route and different sintering, conditions (1225 degreesC/2 h and 1300 degreesC/10 h). The experiments were performed on PZT with different Zr/Ti-ratios in order to obtain pure tetragonal (45/55), pure rhombohedral (60/40), and morphotropic (54/46) compositions. To distinguish between the intrinsic and extrinsic effect microscopic strain measurements (Synchrotron X-ray diffraction) were compared with macroscopic measurements of the mechanical hysteresis loop. The results were correlated with acoustic emission measurements which microscopically reflected the intrinsic and extrinsic contributions to the macroscopic strain of the different crystallographic modifications. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.