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Temperature dependence of elastic properties and piezoelectric applications of BaTeMo2o9 single crystal [Correspondence]

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6 Author(s)
Zeliang Gao ; State Key Lab. of Crystal Mater., Shandong Univ., Jinan, China ; Xin Yin ; Weiguo Zhang ; Shanpeng Wang
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BaTeMo2O9 (BTM) single crystal, as a lead-free piezoelectric material, belongs to the monoclinic system, space group P21. We report the temperature dependence of the elastic constants by the transmission method over the range -50°C to 150°C. The first-order temperature coefficients of the elastic constant s44 is about 180 × 10-6/°C. Piezoelectric resonators based on BTM crystal using the thickness-stretching vibration and the shear vibration modes were designed and evaluated, which eliminated or minimized the influence of the off-principal axis coefficients. The Qm of one of the resonators is about 600. Our results show that the elastic constants have good temperature stability, and the resonators have already met the requirements for some piezoelectric applications. This study on the BTM crystal has revealed the application for the low-symmetry crystal.

Published in:

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:58 ,  Issue: 12 )

Date of Publication:

December 2011

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