首页|Domain wall Engineering in Lead-free Piezoelectric Materials
Domain wall Engineering in Lead-free Piezoelectric Materials
扫码查看
点击上方二维码区域，可以放大扫码查看
原文链接
NETL
NSTL
Grain-oriented barium titanate (BaTiO_3, BT) ceramics were prepared by a templated grain growth (TGG) method using [110]-oriented BT platelike particles as a template and hydrothermal BT 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, BT 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 75 μm despite various F_(100) values and there were no anisotropic microstructures. These grain-oriented BT ceramics were poled at 100 ℃, and their piezoelectric constants d_(33) was measured. As for the results, the d_(33) values increased with increasing F_(110) values, and at around an F_(110) of 85 %, d_(33) reached a maximum of 788 pC/N.
Material Science and Technology, Interdisciplinary Graduate School of Medical and Engineering, University of Yamanashi, 4-4-37 Takeda, Kofu, Yamanashi 400-8510, Japan
NETL
NSTL
