SH波在0.71Pb(Mg_(1/3)Nb_(2/3))O_3-0.29PbTiO_3/金刚石界面的反射和透射  

Reflection and transmission of SH waves at interface between 0.71Pb(Mg_(1/3)Nb_(2/3))O_3-0.29PbTiO_3 and diamond

作　　者：孔艳平[1] 刘金喜[1] 聂国权[1] 

机构地区：[1]石家庄铁道大学工程力学系,石家庄050043

出　　处：《振动与冲击》2016年第22期189-196,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(11272221);河北省自然科学基金(A2015210092)资助项目

摘　　要：研究SH波分别从0.71Pb(Mg_(1/3)Nb_(2/3))O_3-0.29Pb TiO_3(PMN-0.29PT)介质和金刚石介质倾斜入射时在双材料界面上的反射和透射规律。PMN-0.29PT单晶沿[011]c方向极化,宏观上呈正交各向异性性质,且材料主轴沿x3方向旋转切割,数值分析了SH波斜入射时在交界面处的反射、透射系数以及能量反射、透射系数随入射角的变化。结果显示:SH波从金刚石入射时,压电晶体的旋转切割角度对SH波的反射、透射系数和能量分配规律起到非常关键的作用;SH波从压电材料入射时,晶体的旋转切割角度越大,临界角越小,随着入射角的增大,切割角度对SH波反射系数的影响逐渐减小。这些结论可为PMN-PT单晶材料在传感器和频率控制等领域中的应用提供有价值的理论参考。The reflection and transmission of SH waves at the interface between 0.71Pb （Mg1 /3 Nb2 /3 ）O3-0.29PbTiO3 （PMN -0.29PT）and diamond were discussed.The PMN -0.29PT single crystal under consideration was polarized along the [011 ]c direction to get a macroscopic symmetry of orthonormal 2 mm and the cut orientation on the material was made to have an angle with the XZ-plane.The reflection and transmission coefficients and energy distribution coefficients varying with the incident angle were analyzed under the oblique incidence of SH waves.The results show that the cut orientation is critical for the reflection and transmission coefficients and energy distribution coefficients when SH waves are incident from diamond media.When SH waves are incident from piezoelectric media,the larger the cut angle, the smaller the corresponding critical angle,and the cut angle has little influence on the reflection and transmission coefficients for a given large incident angle.The results are valid for the signal processing,transduction,and frequency control of PMN-PT single crystal composite devices.

关 键 词：SH 波 PMN-PT 单晶 金刚石 反射系数 透射系数 

分 类 号：O346[理学—固体力学]