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The Growth and Properties of Lead-Free Ferroelectric Single Crystals

Key Laboratory of Inorganic Functional Material and Device, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 215 Chengbei Road Jiading, Shanghai 201800, China
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Author to whom correspondence should be addressed.
Academic Editor: Shujun Zhang
Crystals 2015, 5(2), 172-192; https://doi.org/10.3390/cryst5020172
Received: 30 April 2014 / Accepted: 15 September 2014 / Published: 25 March 2015
(This article belongs to the Special Issue Piezoelectric Crystals)
Much attention is drawn to the preparation, structure and properties investigation of lead-free ferroelectrics for the next generation of piezoelectric devices. (Na0.5Bi0.5)TiO3-BaTiO3 (NBT-BT) lead-free solid solution piezoelectric single crystals with composition x in the range of 0–0.05 as a materials with high piezoelectric properties were successfully grown from platinum crucible by using the top-seeded solution growth (TSSG) method. The dimensions of NBT-BT crystal is Ø40 × 10 mm2. X-ray powder diffraction patterns reveal that the crystal structure of NBT-BT crystal changes from rhombohedral to tetragonal symmetry with increasing amounts of BT(x). The dielectric, ferroelectric and piezoelectric properties of NBT-BT crystals with different compositions near the morphotropic phase boundary (MPB) were studied systematically. Ions (Mn, Eu, Zn) doped NBT and NBT-BT 95/5 crystals were also grown and studied. In addition, their piezoelectric and ferroelectric properties are investigated. Further, a high-quality and large-sized (K0.25Na0.75)NbO3 (KNN25/75) single crystal has been achieved by a carefully controlled TSSG method. The dimensions of the as-grown KNN25/75 single crystal reached up to Ø30 × 10 mm2. The obtained KNN crystals provided us a superb material for the dielectric, piezoelectric, ferroelectric and electromechanical coupling property characterization along different orientations. View Full-Text
Keywords: lead-free ferroelectrics; crystal growth; piezoelectric performance; ferroelectric performance; ion doping lead-free ferroelectrics; crystal growth; piezoelectric performance; ferroelectric performance; ion doping
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MDPI and ACS Style

Li, X.; Chen, C.; Deng, H.; Zhang, H.; Lin, D.; Zhao, X.; Luo, H. The Growth and Properties of Lead-Free Ferroelectric Single Crystals. Crystals 2015, 5, 172-192. https://doi.org/10.3390/cryst5020172

AMA Style

Li X, Chen C, Deng H, Zhang H, Lin D, Zhao X, Luo H. The Growth and Properties of Lead-Free Ferroelectric Single Crystals. Crystals. 2015; 5(2):172-192. https://doi.org/10.3390/cryst5020172

Chicago/Turabian Style

Li, Xiaobing; Chen, Chao; Deng, Hao; Zhang, Haiwu; Lin, Di; Zhao, Xiangyong; Luo, Haosu. 2015. "The Growth and Properties of Lead-Free Ferroelectric Single Crystals" Crystals 5, no. 2: 172-192. https://doi.org/10.3390/cryst5020172

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