Piezoelectric Materials with Positive Elastic Constant Temperature Coefficients.

摘要

In order to search for new temperature compensated materials for surface acoustic wave (SAW)devices with low ultrasonic attenuation ahd high electromechanical coupling, the following theoretical and experimental investigations were carried out: Lattice dynamics of alpha-quartz; Heuristic molecular engineering approach--temperature coefficients of elastic constants, electromechanical coupling factor, ultrasonic attenuation, list of new potentially temperature compensated materials; Crystal growth; Elastic and thermoelastic property measurements--lead germanate, nepheline, berlinite, eulytite, and NaAlSiO4.