本文研究了Sr_3NbGa_3Si_2O_(14)(SNGS)单晶的晶体结构、能带和态密度,计算了SNGS压电晶体的X、Y和Z切型的声表面波速度与机电耦合系数,分析总结出声表面波特性比较好的切型,为SNGS的声表面波应用提供了理论依据.
The crystal structure, energy band and density of states of Sr_3NbGa_3Si_2O_(14) (SNGS) single crystal was studied, and the phase velocity and electro-mechanical coupling factor of SNGS are calculated for its different cuts. We gained the cut types with good acoustic surface wave (SAW) characteristics, which provides theoretical basis for the SAW application of SNGS piezoelectric crystal.
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