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无机材料学报

无机材料学报

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新型压电晶体锗酸镓锶与硅酸镓镧声表面波传播特性的研究

辛长宇, 吉小军, 施文康   

  1. 上海交通大学电信学院仪器工程系, 上海 200240
  • 收稿日期:2006-01-04 修回日期:2006-03-29 出版日期:2007-03-20 网络出版日期:2007-03-20

SAW Properties of SGG and LGS Piezocrystals

XIN Chang-Yu, JI Xiao-Jun, SHI Wen-Kang   

  1. Department of Instrumentation Engineering, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2006-01-04 Revised:2006-03-29 Published:2007-03-20 Online:2007-03-20

PDF (PC)

1558

被引次数

5

摘要： 新型压电晶体Sr3Ga2Ge4O14(SGG)在声表面波传感器方面有潜在的应用前景. 根据最新的关于锗酸镓锶的特性报道, 理论计算了SGG在X切、Y切和Z切上的声表面波(SAW)传播特性(相速度、机电耦合系数、能流角). 与类质同构体LGS相比较, SGG晶体表现出了更优异的机电特性.

关键词: SGG, 相速度, 机电耦合系数, 能流角

Abstract: A new piezoelectric crystal Sr3Ga2Ge4O14(SGG) has potential applications in Surface Acoustic Wave (SAW) device. Based on the piezoelectric properties recently reported, the SAW properties of SGG crystal in some cuts were calculated by means of Christofel Equation and boundary conditions for the first time. Compared with the well-known piezocrystal La3Ga5O14(LGS), SGG crystal shows higher electromechanical properties.

Key words: Sr3Ga2Ge4O14, phase velocity, electromechanical coupling factor, power flow angl

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