ADP及KDP晶体纵向压电系数d_(33)的计算及其验证  

Calculations and Experimental Measurements of Piezoelectric Coefficient d_(33) in ADP and KDP Single Crystals

作　　者：王越[1] 常新安[2] 刘国庆[1] 蒋毅坚[3] 

机构地区：[1]北京工业大学应用数理学院,北京100022 [2]北京工业大学材料学院,北京100022 [3]北京工业大学国家产学研激光技术中心,北京100022

出　　处：《人工晶体学报》2006年第4期702-704,714,共4页Journal of Synthetic Crystals

摘　　要：ADP(磷酸二氢铵)和KDP(磷酸二氢钾)晶体都属于42m点群,是20世纪早期的著名压电晶体,具有易于大尺寸生长的优点。但它们在主轴坐标系中只有厚度切变压电系数(d14,d36),没有纵向压电系数(d33,k33),而这种纵向压电效应在实际应用中较多。本文通过利用坐标变换的方法,计算了这两种晶体纵向压电性能在空间的分布。通过计算,首先我们发现这两种晶体在空间存在着纵向伸缩压电效应,其次我们还得到了它们在空间的纵向压电系数的最大值和切型。ADP晶体:d33,m ax=8.66×10-12C/N,切型为(xywl)45°/50°;k33,m ax=0.07,切型为(xywl)45°/50°。KDP晶体:d33,m ax=4.54×10-12C/N,切型为(yzlw)45°/55;°k33,m ax=0.04,切型为(yzlw)45°/48°。ADP晶体的纵向压电性能略好于KDP。另外,本文还分别对上述计算结果进行了实验验证,实验结果与计算结果基本一致。对两种晶体压电器件的进一步开发和利用具有理论指导意义。ADP （ammonium dihydrogen phosphate） and KDP （patassium dihydrogen phosphate） are classified as 42m point group which both are the famous piezoelectric crystals in earlier last century. But they all have thickness shear piezoelectric effect and no longitudinal piezoelectric properties in principle axis coordinate which has more applications in industry. In this paper, the crystal orientation dependence of longitudinal piezoelectric properties （d33, k33 ） in these two crystals have been calculated by means of the coordinate transformation method. According to the calculation, it is found that there is longitudinal length extension piezoelectric effect in three-dimension space. The maximum values of longitudinal length extension piezoelectric constants （d33 ,k33） and cutting-types are also obtained. For ADP： d33,max = 8.66 × 10^-12 C/N, cutting-type （xywl） 45°/55° ; k33,max = 0.07, cutting-type （xywl） 45°/50°. For KDP： d33,m° = 4.54 × 10^ - 12 C/N, cutting-type （yzlw） 45 °/55 ° ; k33,max=0.04, cutting-type （yzlw） 45 °/48°. The longitudinal piezoelectric properties of ADP is much better than that of KDP. These above results of d33 are verified by the experimental measurements respectively. These results will be useful for the design of their piezoelectric devices and futher applications.

关 键 词：磷酸二氢钾 磷酸二氢铵 压电效应 机电耦合系数 切型 

分 类 号：O73[理学—晶体学]