Electroacoustical constants and Rayleigh surface acoustic wave propagation characteristics of calcium aluminate silicate Ca2Al2SiO7 single crystals
Electroacoustical constants and Rayleigh surface acoustic wave propagation characteristics of calcium aluminate silicate Ca2Al2SiO7 single crystals
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DOI：
10.7567/jjap.57.11ud01
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发表时间：
2018-09
影响因子：
1.5
通讯作者：
H. Takeda;K. Akimoto;Takuto Oshima;Kenta Takizawa;J. Kondoh;A. Matsutani;T. Hoshina;T. Tsurumi
中科院分区：
文献类型：
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作者：
H. Takeda;K. Akimoto;Takuto Oshima;Kenta Takizawa;J. Kondoh;A. Matsutani;T. Hoshina;T. Tsurumi
测量了具有点群四元结构的铝酸钙硅酸盐Ca 2Al 2SiO 7压电单晶的电声常数（、和dij）。所有常数的归一化一阶温度系数在−30 ° C和120 °C之间以10 kHz频率测定，例如，和的分别为69.3和87.6，d14和d36的分别为−338.4和552.4 ppm/°C。从理论上计算了晶体基本X切和Z切的瑞利表面声波（SAW）速度。该结果得到了支持的SAW速度测量的Z切的晶体，证明了在这项研究中确定的电声常数的准确性。
Electroacoustical constants (, , and dij) of calcium aluminate silicate Ca2Al2SiO7 piezoelectric single crystals, which have the tetragonal structure with the point group , were evaluated. The normalized first-order temperature coefficients of all the constants were determined between −30 and 120 °C at 10 kHz frequency, e.g., for and were 69.3 and 87.6, and for d14 and d36 were −338.4 and 552.4 ppm/°C, respectively. The Rayleigh surface acoustic wave (SAW) velocities for the fundamental X- and Z-cuts of the crystals were theoretically calculated. The results were supported by the SAW velocities measured for the Z-cut of the crystal, proving the accuracy of the electroacoustic constants determined in this study.