Preparation of [110] grain oriented barium titanate ceramics by templated grain growth method and their piezoelectric properties
Preparation of [110] grain oriented barium titanate ceramics by templated grain growth method and their piezoelectric properties
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DOI：
10.1143/jjap.46.7039
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发表时间：
2007-10-01
期刊：
影响因子：
--
通讯作者：
Kimura, Toshio
中科院分区：
文献类型：
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作者：
Wada, Satoshi;Takeda, Kotaro;Kimura, Toshio
以[110]取向钛酸钡（BaTiO3）板状颗粒为模板，以不同粒径的水热BaTiO3球形颗粒为基体，采用模板颗粒生长（TGG）法制备了[110]取向钛酸钡（BaTiO3）陶瓷。通过Lotgering方法，利用x射线衍射（XRD）图测量了沿[110]方向的取向度F-110。为了同时获得高密度和高F-110，对制备条件进行了优化，优化结果与基体粒径、模板与基体的体积分数和烧结温度有关。结果表明，在F-110为0 ~ 98%的范围内，均成功制备了密度大于96%的BaTiO3晶粒取向陶瓷。扫描电子显微镜（SEM）显示，尽管F-110值不同，但其平均晶粒尺寸始终在75 pm左右，且不存在各向异性的微观结构。将这些晶粒取向的BaTiO3陶瓷在100℃下极化，采用共振-反共振法测量其压电性能，并使用c33米测量d（31）和d（33）压电常数。结果表明，在-50 pC/N时，无论F-110值如何变化，d（31）值基本不变，而d（33）值随着F-110值的增大而增大，在F-110值为85%左右时，d33达到最大值788pC/N。
[110]-oriented barium titanate (BaTiO3) ceramics were prepared by templated grain growth (TGG) method using [110]-oriented BaTiO3 platelike particles as a template and hydrothermal BaTiO3 sphere particles,with different particle sizes as a matrix. The degree of orientation along the [110] direction, F-110, was measured using an X-ray diffraction (XRD) pattern by the Lotgering method. To obtain both a high density and a high F-110, the preparation conditions were optimized as functions of matrix particle size, volume fraction of the template to the matrix, and sintering temperature. As for the results, BaTiO3 grain-oriented ceramics with a high density of more than 96% were successfully prepared despite various F-110 values from 0 to 98%. Scanning electron microscopy (SEM) revealed that their average grain sizes were always approximately 75 pm despite various F-110 values and there were no anisotropic microstructures. These grain-oriented BaTiO3 ceramics were poled at 100 degrees C, and their piezoelectric properties were measured using a resonance-antiresonance method and a piezo C 33 meter for d(31) and d(33) piezoelectric constants. As for the results, the d(31) values were almost constant at -50 pC/N despite various F-110 values, while the d(33) values increased with increasing F-110 values, and at around an F-110 of 85%, d33 reached a maximum of 788pC/N.