New piezoelectric crystal: Synthetic fresnoite (Ba2Si2TiO8)
- 15 August 1976
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 29 (4) , 227-228
- https://doi.org/10.1063/1.89045
Abstract
A fresnoite (Ba2Si2TiO8) single crystal was grown from the melt by the Czochralski method. Synthetic fresnoite has an electromechanical coupling factor in the thickness shear mode of k15=0.28, and a resonance‐frequency temperature coefficient in this mode of Tfr=−33 ppm/°C. Fresnoite is considered to be superior to Ba2Ge2TiO8 for various piezoelectric applications because of the absence of microtwins observed in Ba2Ge2TiO8.Keywords
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