PIEZOELECTRIC CHARACTERIZATION OF Ca2Al2SiO7 CRYSTALS
High temperature piezoelectric crystal materials are promising for various applications especially the sensors serving under harsh environment without failure for structural health monitoring and/or nondestructive evaluation of the modern aerospace structures at elevated temperatures (above 600℃).The Ca2AhSiO7 (CAS) is a newly developed piezoelectric crystal.In this report, the dielectric, piezoelectric and electromechanical properties of CAS crystal grown by Czochralski pulling method were evaluated by means of impedance method.The independent piezoelectric coefficients d14 and d36 at room temperature were determined to be on the order of 6.7 and 2.SpC/N, respectively.For potential piezoelectric sensor application, the maximum piezoelectric coefficients of d11 and d26 were calculated, where the largest d11 value was obtained to be 3.1 pC/N for (XYtl)45°/-55° crystal cut, and the largest piezoelectric d26 was found to be 4.7 pC/N for (YXl)45° crystal cut, which is nearly two times that of alpha quartz, Moreover, the temperature dependence of piezoelectric coefficients of CAS crystal were obtained to show small variations (2%~6%) from ambient temperature to 700℃, indicating the advantages of CAS crystal for high temperature piezoelectric application.
Piezoelectric Single crystals Ca2Al2SiO7 High temperature
Chao JIANG Yong LONG Ling-feng KONG Li-feng QIN Fa-peng YU Xiu-feng CHENG Xian ZHAO
Institute of Crystal Materials, Shandong University, Jinan 250100, P.R.China 226th Institute of China Electronics Technology Group Corporation, Chongqing 400060, P.R.China Institute of Crystal Materials, Shandong University, Jinan 250100, P.R.China;Department of Mechanica Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, P.R.China
国际会议
The 2017 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2017全国压电和声波理论及器件技术研讨会)
成都
英文
142-146
2017-10-27(万方平台首次上网日期,不代表论文的发表时间)