Piezoelectric Materials with Positive Elastic Constant Temperature Coefficients.
Final rept. 8 Jan 73-8 Jan 75,
PENNSYLVANIA STATE UNIV UNIVERSITY PARK MATERIALS RESEARCH LAB
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In order to search for new temperature compensated materials for surface acoustic wave SAWdevices 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.
- Line, Surface and Bulk Acoustic Wave Devices
- Acoustooptic and Optoacoustic Devices
- Solid State Physics