INVESTIGATION OF THE RADIAL EXTENSIONAL MODE OF LN PIEZOELECTRIC CRYSTAL

摘要：

　　Piezoelectric materials functional at elevated temperatures without failure are desirable for various piezoelectric applications.In this paper, the lithium niobate (LiNbO3, LN) crystal and the radial extensional (RE) properties were studied.Based on the crystal symmetry, the equations to evaluate the kp value with Z-and Y-oriented discs were deduced.Using the deduced equations, the kp values of the Z-oriented and Y-oriented LN crystal discs were calculated and obtained to be 3.83% and 24.7%, respectively.In addition, the radial extension mode was studied experimentally by impedance method, where the kp values were found to be on the order of 3.80% and 24.5%, respectively.Moreover, the temperature dependence of RE electromechanical properties were investigated from room temperature to 500℃, where the variation of the kp was found to be <8% for the Y-oriented discs.The large kp value and minimal temperature dependent behavior of Y-oriented crystal cuts indicating the potential uses for high temperature piezoelectric application.

关键词： Piezoelectric crystal LN Radial extensional mode Temperature stability

作者: Fei-fei CHEN Ling-feng KONG Wei Song Fa-peng YU Li-feng QIN Chun-lei WANG Xian ZHAO

作者单位: State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P.R.China State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P.R.China;Department o CETC Deqing Huaying Electronics Co., Ltd, P.R.China Department of Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005, P.R.China

会议类型: 国际会议

会议名称: 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)

会议地点: 成都

会议语种:英文

页码: 36-39

在线出版日期: 2017-10-27（万方平台首次上网日期，不代表论文的发表时间）