NDLI: Characterization and optimization of the growth conditions of a novel Cs2TeW3O12 piezoelectric crystal

Content Provider	Royal Society of Chemistry (RSC)
Author	Gao, Zeliang Li, Conggang Wu, Qian Tian, Xiangxin Sun, Youxuan Xia, Shengqing Zhang, Chengqian Zhao, Peng Tao, Xutang
Copyright Year	2017
Abstract	In this study, Cs2TeW3O12 (CTW) single crystals were grown successfully through a top-seeded solution growth (TSSG) method using TeO2 as a self-flux. We identified a complete set of growth process parameters suitable for facilitating the growth of a high-quality CTW crystal. The results indicate that, in the same thermal field and with an appropriate flux ratio, a smaller cooling rate of the melt facilitates the smooth growth of high-quality CTW single crystals. The melt-viscosity versus temperature curves for different flux ratios were measured, and their effects on the crystal quality were discussed. In addition, the morphology of the crystal can be controlled by adjusting the rotation speed and the orientation of the seed. To investigate piezoelectric performance, complete sets of dielectric, elastic, and piezoelectric coefficients of CTW crystals were measured using both resonance and impedance analysis. The piezoelectric coefficients d33 and d15 reached 19.1 pC N−1 and 25.9 pC N−1, respectively. The electromechanical coupling coefficient, k33, was 37.7%, slightly higher than that of Cs2TeMo3O12 (CTM). Furthermore, the extent of dipole moment and polyhedron distortion of the CTW crystal were analysed in detail, and the relationship between the crystal structure and the piezoelectric properties was also discussed.
Starting Page	4278
Ending Page	4284
Page Count	7
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	7
Issue Number	8
Journal	RSC Advances
DOI	10.1039/c6ra26776a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Polyhedron CTW Piezoelectricity Dipole Electromechanical coupling coefficient Resonance Dielectric CTM Tellurium dioxide Electrical impedance
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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