标题：The growth and investigations of electromechanical properties of Fresnoite Ba2Si2TiO8crystal as a function of orientation
作者：Shen, Chuanying ;Wang, Duanliang ;Zhang, Jinyue ;Zhang, Huaijin ;Wang, Jiyang ;Boughton, Robert I.
作者机构：[Shen, Chuanying ;Wang, Duanliang ;Zhang, Jinyue ] Shandong Province Key Laboratory of Laser Polarization and Information Technology, College of Physi 更多
来源：Journal of Crystal Growth
摘要：Large sized Fresnoite Ba2TiSi2O8single crystals were grown by the Czochralski method. Using coordinate transformation methods, the relative dielectric, piezoelectric and elastic constants of Fresnoite Ba2TiSi2O8as a function of orientation were investigated, and their two- and three-dimensional spatial distributions are presented. From them, the maximum values of the piezoelectric coefficients and the corresponding rotation angle can be obtained. The maximum values of coefficients d22∗,d23∗,d24,∗d32∗,d33∗andd34∗were achieved for rotation angles of 40°, 32°, 0°, 58°, 50° and 90°, respectively, and are on the order of 8.7, −4.7, 17.5, 4.7, 8.7 and 17.5 pC/N, respectively. Furthermore, the validity of the electromechanical properties investigation as a function of orientation was verified. The relative dielectric permittivity, elastic constant and piezoelectric coefficient of a ZXl50ocut rod were calculated and found to be 14.1, 8.7 pC/N and 11.2 pm2/N, respectively, in good agreement with the experimental values of 12.7, 9.1 pC/N and 11.7 pm2/N. This investigation is important in providing direction for theoretical research and device design of piezoelectric Ba2TiSi2O8crystals.
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