标题：Temperature dependence of electro-elastic properties of yttrium calcium oxyborate single crystlals
作者：Yu, Fa-Peng ;Duan, Xiu-Lan ;Zhang, Shu-Jun ;Yu, Yong-Gui ;Ma, Ting-Feng ;Zhao, Xian
作者机构：[Yu, Fa-Peng ;Duan, Xiu-Lan ;Yu, Yong-Gui ;Zhao, Xian ] State Key Laboratory of Crystal Materials, Institute of Crystal Materials, Shandong University 更多
会议名称：2012 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2012
会议日期：23 November 2012 through 25 November 2012
来源：Proceedings of the 2012 Symposium on Piezoelectricity, Acoustic Waves and Device Applications, SPAWDA 2012
关键词：High temperature sensors; Piezoelectric properties; Temperature dependence; YCOB crystals
摘要：High temperature piezoelectric crystals, YCa4O(BO 3)3 (YCOB) possess relatively high piezoelectric activities (deff = ∼7.8pC/N, keff= ∼19%) and no phase transition prior to the melting point (∼1500°C), indicating the potential use for high temperature sensing. In this work, growth of YCOB single crystals by using Czochralski (Cz) method was introduced and the temperature dependence of electro-elastic properties was investigated from 20 to 950°C, where the resonance frequencies relating to elastic compliances sE33 and sE55, were found to shift linearly with increasing temperature, with relatively large first order temperature coefficient being on the order of ∼94ppm/°C. Of particular significance is that the lateral mode of (XY) and (XZ) crystal cuts were found not only possess relatively high electromechanical coupling factor (k eff= ∼15%) and piezoelectric coefficient (deff = ∼4 pC/N), but also the temperature independence of electromechanical properties, demonstrating YCOB a good candidate for high temperature piezoelectric sensing. © 2012 IEEE.