Sheet geometry enhanced giant piezoelectric coefficients
Sheet geometry enhanced giant piezoelectric coefficients
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DOI：
10.1063/1.2408633
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发表时间：
2006-12-11
影响因子：
4
通讯作者：
Shih, Wei-Heng
中科院分区：
文献类型：
--
作者：
Shih, Wan Y.;Luo, Hongyu;Shih, Wei-Heng
作者报告了在 E >= 7 kV/cm 时无基板多晶 (Pb(Mg1/3Nb2/3)O-3)(0.63)(PbTiO3)(0.37) (PMN-37PT) 片材中的巨大压电系数 -d(31)=2000 pm/V，大于特殊切割的商用 PMN-PT 单晶所表现出的 -d(31)=930 pm/V 和300-500 pm/V 多晶块 PMN-37PT。 X射线衍射表明，由于薄片的几何形状，即使在极化之后，本发明的PMN-37PT片也含有约60体积%的四方α和菱面体域。在大视场下，这些四方 a 和菱面体域转变为四方 c 域，导致高场下的巨大 d(31) 增强。 (c) 2006 年美国物理研究所。
The authors report a giant piezoelectric coefficient, -d(31)=2000 pm/V in substrate-free polycrystalline (Pb(Mg1/3Nb2/3)O-3)(0.63)(PbTiO3)(0.37) (PMN-37PT) sheets at E >= 7 kV/cm, larger than the -d(31)=930 pm/V exhibited by specially cut commercial PMN-PT single crystals and 300-500 pm/V of polycrystalline bulk PMN-37PT. X-ray diffraction indicated due to the thin sheet geometry the present PMN-37PT sheets contained about 60 vol % of the tetragonal a and rhombohedral domains even after poling. At large fields, these tetragonal a and rhombohedral domains switched to the tetragonal c domains to result in the giant d(31) enhancement at high fields. (c) 2006 American Institute of Physics.