PIEZOELECTRIC PROPERTIES OF Ba2 NaNb5 O15
- 1 January 1969
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 14 (1), 34-35
- https://doi.org/10.1063/1.1652648
Abstract
Single‐crystal Ba2NaNb5O15 (z plate) has been found to have a piezoelectric coupling factor in the thickness longitudinal mode kt equal to 0.57. As a value of kt determined by direct measurement, this result is the highest value yet reported for a single‐crystal ferroelectric material usable at and above room temperature. Since this material has good mechanical handling characteristics, a relatively low dielectric constant , and a pure mode of vibration, plates of this material are attractive for applications as high‐frequency longitudinal mode transducers. The approximate values of the thickness shear mode coupling factors for x and y plates are k15 = 0.20 and k24 = 0.20.
Keywords
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