Theoretical Studies on the SAW Properties of LGS at High-Temperature in Optimal Cuts  

作　　者：Xiaojun JI, Tao HAN, Wenkang SHI and Guowei ZHANGDepartment of Instrumentation Engineering, Shanghai Jiao Tong University, Shanghai 200030, China 

出　　处：《Journal of Materials Science & Technology》2004年第5期512-516,共5页材料科学技术（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China under grant No.60274062.

摘　　要： Surface acoustic wave (SAW) devices play a significant role in signal processing, frequency control and sensing applications. In general, they cannot operate at elevated temperature. The new crystal of langasite provides possibility for surface acoustic wave devices applied at high temperature. This paper studies the SAW properties of single and doubly rotated cuts of LGS at high temperature. The calculated SAW properties of LGS are analyzed in space with aid of contour plots, and two promising SAW orientation regions at high temperature are presented. For some typical cuts and propagating directions within the two optimal regions, their SAW characteristics vs temperature are discussed. Based on the experimental evidence in some literatures, the reliability of calculated results is verified.Surface acoustic wave (SAW) devices play a significant role in signal processing, frequency control and sensing applications. In general, they cannot operate at elevated temperature. The new crystal of langasite provides possibility for surface acoustic wave devices applied at high temperature. This paper studies the SAW properties of single and doubly rotated cuts of LGS at high temperature. The calculated SAW properties of LGS are analyzed in space with aid of contour plots, and two promising SAW orientation regions at high temperature are presented. For some typical cuts and propagating directions within the two optimal regions, their SAW characteristics vs temperature are discussed. Based on the experimental evidence in some literatures, the reliability of calculated results is verified.

关 键 词：High-temperature Surface acoustic wave LANGASITE Optimal cuts 

分 类 号：TG506[金属学及工艺—金属切削加工及机床]