CNGS和CTGS新型压电晶体的声表面波特性研究

Theory Study on the SAW Properties of CNGS and CTGS Piezoelectric Crystal

本文计算了CNGS和CTGS压电晶体的X,Y和Z切型的声表面波速度、机电耦合系数及能流角,并与LGS晶体进行了比较,计算结果表明了CNGS和CTGS同LGS一样,同样具有声表面波速度低、机电耦合系数大、存在能流角为零的切型等优点,同时总结出声表面波特性比较好的切型,为CNGS和CTGS的声表面波应用提供了理论依据。

The phase velocity,electro-mechanical coupling factor and power flow angle of X,Y and Z cuts of CNGS and CTGS are caculated in this paper.Similar to LGS,CNGS and CTGS have lower velocity,high electro-mechanical coupling factor and cuts of zero power flow angle.We gained the cut types with well characteristics of SAW,which provides theoretical basis for the SAW application of CNGS and CTGS piezoelectric crystal.