硅酸镓镧晶体的旋光及声学性质研究  

Study on optical activity and acoustics properties of La_3Ga_5SiO_(14) crystal

作　　者：魏爱俭[1] 袁多荣[2] 王宝林[1] 

机构地区：[1]山东大学信息学院,山东济南250100 [2]山东大学晶体材料国家重点实验室,山东济南250100

出　　处：《山东大学学报（理学版）》2005年第3期53-56,65,共5页Journal of Shandong University(Natural Science)

基　　金：国家自然科学基金资助项目(50372034);山东大学晶体材料国家重点实验室开放基金资助项目(11170005240303)

摘　　要：研究了新型压电材料硅酸镓镧的旋光性质和声学性质.实验得出硅酸镓镧的旋光率ρ比石英小;旋光率色散满足波尔兹曼方程.并由克里斯托夫方程推导出声光沿硅酸镓镧晶体x,y,z轴的传播特性以及声波沿着yz,xy,xz3个面的慢度(倒速度)曲线方程,并绘制了3个主晶面内声的慢度分布曲线图,以便于LGS纯切变波、准纵波和准切变波波速的计算.Optical activity and acoustics properties of La_3Ga_5SiO_ 14 were studied. The experiments show that the rotations of La_3Ga_5SiO_ 14 are smaller than that of α-SiO_2 and rotation dispersion satisfies Boltzmann equation. Based on Christoffet equation propagation, characteristics of acoustic wave along x, y and z axis and slowness equations of acoustic wave along yz, xy and xz plane were derived. The curves of slowness in (100), (010) and (001) were plotted to calculate the acoustic velocities of pure shear wave, qusilongitudinal wave and qusishear wave.

关 键 词：La3GA5SiO14晶体 旋光率p 克里斯托夫方程 声速 

分 类 号：O436[机械工程—光学工程] O735[理学—光学]