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Crystals 2019, 9(1), 29; https://doi.org/10.3390/cryst9010029

Bismuth-Based Oxyborate Piezoelectric Crystals: Growth and Electro-Elastic Properties

1
State Key Laboratory of Crystal Materials, Advanced Research Center for Optics, Shandong University, Jinan 250100, China
2
School of Physics, Shandong University, Jinan 250100, China
*
Author to whom correspondence should be addressed.
Received: 13 December 2018 / Revised: 2 January 2019 / Accepted: 2 January 2019 / Published: 6 January 2019
(This article belongs to the Special Issue Crystal Growth of Multifunctional Borates and Related Materials)
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Abstract

The non-centrosymmetric bismuth-based oxyborate crystals have been extensively studied for non-linear optical, opto-electric and piezoelectric applications. In this work, single crystal growth and electro-elastic properties of α-BiB3O6 (α-BIBO) and Bi2ZnB2O7 (BZBO) crystals are reported. Centimeter-sized α-BIBO and BZBO crystals were grown by using the Kyropoulos method. High resolution X-ray diffraction tests were performed to assess the crystal quality. The full-width at half-maximum values (FWHM) of the rocking curves were evaluated to be 35.35 arcsec and 47.85 arcsec for α-BIBO and BZBO samples, respectively. Moreover, the electro-elastic properties of α-BIBO and BZBO crystals are discussed and summarized, based on which the radial extensional and the face shear vibration modes were studied for potential acoustic device applications. The radial extensional mode electro-mechanical coupling factors kp were evaluated and found to be 32.0% and 5.5% for α-BIBO and BZBO crystals, respectively. The optimal crystal cuts with face shear mode were designed and found to be (YZt)/−53° (or (YZt)/37° cut) for α-BIBO crystal, and (ZXt)/±45° cut for BZBO crystal, with the largest effective piezoelectric coefficients being in the order of 14.8 pC/N and 8.9 pC/N, respectively. View Full-Text
Keywords: α-BiB3O6; Bi2ZnB2O7; single crystal growth; electro-elastic properties α-BiB3O6; Bi2ZnB2O7; single crystal growth; electro-elastic properties
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Chen, F.; Cheng, X.; Yu, F.; Wang, C.; Zhao, X. Bismuth-Based Oxyborate Piezoelectric Crystals: Growth and Electro-Elastic Properties. Crystals 2019, 9, 29.

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