Evaluation of Ferroelectric Properties of Piezoelectric Ceramics Based on Crystallographic Homogenization Method and Crystal Orientation Analysis by SEM·EBSD Technique
Evaluation of Ferroelectric Properties of Piezoelectric Ceramics Based on Crystallographic Homogenization Method and Crystal Orientation Analysis by SEM·EBSD Technique
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DOI：
10.1299/jsmea.49.209
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发表时间：
2006-04
期刊：
影响因子：
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通讯作者：
Y. Uetsuji;Toshihiro Yoshida;T. Yamakawa;K. Tsuchiya;S. Ueda;E. Nakamachi
中科院分区：
文献类型：
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作者：
Y. Uetsuji;Toshihiro Yoshida;T. Yamakawa;K. Tsuchiya;S. Ueda;E. Nakamachi
压电多晶的宏观铁电性能受到微观非均匀晶体结构的强烈影响。在我们之前的研究中，基于晶体均匀化方法的多尺度有限元方法已经发展到考虑微观晶体形态的宏观性能估计。本文采用SEM·EBSD技术对多晶钛酸钡的晶体取向分布进行了测量，并将测量到的晶体取向分布引入微观有限元模型。由于宏观性质的预测依赖于被测晶体取向的采样条件，因此研究了采样点数和采样面积的影响。从而明确了估算宏观铁电性能的有效取样条件。
Macroscopic ferroelectric properties of piezoelectric polycrystals are strongly affected by microscopic inhomogeneous crystal structure. In our previous study, a multi-scale finite element method based on crystallographic homogenization method has been developed to estimate macroscopic properties considering microscopic crystal morphology. In this paper, the crystal orientation distribution of polycrystalline barium titanate has been measured by SEM·EBSD technique, and the measured crystal orientation distribution has been introduced to the microscopic finite element model. As the prediction of macroscopic properties depends on the sampling conditions of the measured crystal orientations, the effects of number of sampling points and sampling area have been investigated. As a result, the effective sampling conditions have been clarified to estimate macroscopic ferroelectric properties.