La_3Ga_5SiO_(14)的BAW传播特性  

Propagating Characteristics of Bulk Acoustic Waves in La_3Ga_5SiO_(14) Crystal

作　　者：魏爱俭[1] 袁多荣[2] 赵奕君[1] 祁海峰[1] 

机构地区：[1]山东大学信息学院光学系,济南250100 [2]山东大学晶体材料研究所晶体材料国家重点实验室,济南250100

出　　处：《人工晶体学报》2005年第2期200-204,共5页Journal of Synthetic Crystals

基　　金：国家自然科学基金资助项目(No. 50372034);山东大学晶体材料国家重点实验室开放基金项目(No. 11770005240303)

摘　　要：详细推导计算了声体波(BAW)在La3Ga5SiO14 (LGS)晶体中分别沿YZ、XY、XZ面传播的纯切变波,准切变波,准纵波的表达式。绘制了LGS晶体在(100)、(010)、(001)这三个主晶面内声的慢度分布曲线图。计算了声速的最大值并与石英进行比较,结果表明LGS晶体的BAW传播速度一般比石英低1000m/s左右。为该晶体在声体波器件等方面的设计和应用提供了一定的理论指导作用。The expressions of bulk acoustic waves (BAW) propagating on YZ, XY and XZ planes of the La3Ga5SiO14 (LGS) crystal were deduced in detail. The curves of slowness on (100), (010) and (001) planes of LGS crystal were plotted. The maximum of acoustic velocity of the LGS crystal was also calculated, and the comparison with that of α-SiO2 was made. It appears that, in general, the acoustic velocity of the LGS crystal is about 1000 m/s smaller than that of α-SiO2. The results can provide some theoretical guidances for design and application of the LGS crystal in BAW device.

关 键 词：La3Ga5SiO14晶体 克里斯托夫方程 慢度曲线 声速 声体波 非铁电压电晶体 

分 类 号：O735[理学—晶体学]