Temperature Compensated Piezoelectric Lithium Tetraborate Crystal for High Frequency Surface Acoustic Wave and Bulk Wave Device Applications

Abstract

All dielectric, elastic and piezoelectric constants, and their first and second order temperature coefficients have been newly determined. Based upon these data set, Rayleigh SAW, leaky SAW and bulk wave properties have been studied for the various orientation and propagation from theoretical and experimental points of view. Both theoretical and experimental results have shown that Rayleigh SAW possesses a particularly useful cut with the zero temperature coefficient of delay (ZTCD) at (oO,~~O,~OO). A new temperature-compensated leaky SAW orientation has been located around (Oo,750,750) with vs of 4120m/s and k = 1.6%. Further it has been conf irmedj, theoretically