New piezoelectric materials

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Abstract

The Institute of Crystallography of the Russian Academy of Science is conducting a program aimed at the search for, the growth, and the investigation of new materials for different electronic applications: resonators, filters, UHF acoustic high-temperature receivers, temperature sensors, pressure sensors, acceleration sensors, etc. Different crystals have been grown by the following methods: (1) hydrothermal, (2) Czochralski, (3) from solution in the melt, and (4) from solutions. The grown crystals were investigated by resonance and ultrasonic methods in order to obtain information on elastic and piezoelectric properties. Dielectric, acoustooptic, and UHF techniques were used for acoustic loss and dielectric constant measurements. The perfection of grown crystals was characterized by different X-ray and optical methods.<<ETX>>