[001]c极化0.93Pb(Zn_(1/3)Nb_(2/3))O_3-0.07PbTiO_3单晶中声表面波传播特性  

Surface Acoustic Wave Propagation in 0.93Pb( Zn_(1 /3)Nb_(2/3))O_3-0. 07PbTiO_3 Single Crystal Poled along [001]c

作　　者：李秀明[1] 吴广涛[1] 徐权[1] 张锐[2] 李玉春[1] 

机构地区：[1]大庆师范学院机电工程学院,大庆163712 [2]哈尔滨工业大学物理系,哈尔滨150080

出　　处：《人工晶体学报》2015年第5期1222-1226,1253,共6页Journal of Synthetic Crystals

基　　金：黑龙江省教育厅科学技术研究项目(12523002)

摘　　要：利用室温下弛豫铁电单晶0.93Pb(Zn1/3Nb2/3)O3-0.07PbTiO3的材料参数,计算了[001]c极化PZN-7%PT晶体中的声表面波传播特性。结果表明,[001]c极化0.93Pb(Zn1/3Nb2/3)O3-0.07Pb TiO3单晶具有明显优于传统压电材料的声表面波特性。0.93Pb(Zn1/3Nb2/3)O3-0.07Pb Ti O3单晶的声表面波特性随着传播方向发生明显的变化。综合考虑晶体的三种声表面波特性,发现Y切型晶体的综合声表面波性能最好,声表面波机电耦合系数k2值较大,能流角和声表面波自由表面相速度值较小,有望应用于下一代低频声表面波设备中。Using the 0.93Pb（ Zn1/3Nb2 /3）O3-0. 07 PbTiO3（ PZN-7% PT） material parameters at room temperature,the surface acoustic wave propagation characteristics of [001]c poled PZN-7% PT single crystal were calculated. The results show that 0. 93Pb（ Zn1 /3Nb2 /3） O3-0. 07 PbTiO3 single crystals have excellent surface acoustic wave properties compared to traditional piezoelectric materials. It is also found that the SAW properties of 0.93Pb（ Zn1 /3Nb2 /3） O3-0. 07 Pb TiO3 single crystals poled along [001]c strongly depend on the propagation direction. Considering all the related factors about the SAW properties,it is concluded that the Y-cut 0. 93Pb（ Zn1 /3Nb2 /3）O3-0. 07 Pb TiO3 single crystals possess superior performance,such as high electromechanical coupling coefficients,low phase velocities and small power flow angles. Therefore,Y-cut 0. 93Pb（ Zn1 /3Nb2 /3）O3-0. 07 PbTiO3 single crystals poled along [001]c is very suitable for ultra-wide bandwidth applications in low-frequency SAW devices.

关 键 词：0.93Pb(Zn1/3Nb2/3)O3-0.07PbTiO3 声表面波 机电耦合系数 

分 类 号：TN65[电子电信—电路与系统]