标题：Investigations on the thermal and piezoelectric properties of fresnoite Ba2TiSi2O8 single crystals
作者：Shen, Chuanying; Zhang, Huaijin; Cong, Hengjiang; Yu, Haohai; Wang, Jiyang; Zhang, Shujun
作者机构：[Shen, Chuanying; Zhang, Huaijin; Cong, Hengjiang; Yu, Haohai; Wang, Jiyang] Shandong Univ, State Key Lab Crystal Mat, Inst Crystal Mat, Jinan 250100, 更多
通讯作者地址：[Zhang, HJ]Shandong Univ, State Key Lab Crystal Mat, Inst Crystal Mat, Jinan 250100, Shandong, Peoples R China.
来源：JOURNAL OF APPLIED PHYSICS
摘要：Fresnoite crystals with the nominal composition Ba2TiSi2O8 (BTS) were grown using the Czochralski technique. The full matrix material constants were determined based on the IEEE standards, with d(31), d(33), and d(15) coefficients being on the order of 2.7, 4.0, and 17.5 pC/N, respectively. A positive sign of d(31) was confirmed using strain measurements and rotated crystal cuts, where a maximum d*(33) value of 9.1 pC/N was achieved for ZXl50 degrees crystal cut. The dielectric, piezoelectric, and related thermal properties were investigated as a function of temperature, showing strong anisotropic behavior, inherently associated with its layered crystal structure. The temperature dependence of d(15) and d*(33) revealed a variations of <6% over the temperature range of 20-700 degrees C. The good thermal stability, together with the high piezoelectric properties and electrical resistivity (>10(7) Omega.cm at 600 degrees C), makes fresnoite BTS crystals promising candidates for high temperature sensing applications. (C) 2014 AIP Publishing LLC.