Growth and high-temperature electromechanical properties of Ca3NbX3Si2O14 (X=Ga and Al) piezoelectric crystals |
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| Authors: | Shujun Zhang Haikuan Kong Ru Xia Yanqing Zheng Jun Xin Thomas R Shrout |
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| Institution: | 1. Materials Research Institute, Pennsylvania State University, University Park, PA, 16802, USA;2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China;1. Institute for Materials Research (IMR), Tohoku University, Sendai 980-8577, Japan;2. New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai 980-8579, Japan;3. C&A Corporation, Sendai 980-8579, Japan;1. Université Grenoble Alpes, CNRS, Grenoble INP, SIMAP, F-38000 Grenoble, France;2. Institut Lumière Matière, UMR 5306 Université Lyon 1-CNRS, Villeurbanne cedex, France;3. LTSE Laboratory, University of Science and Technology Houari Boumediene, BP 32 Elalia, Bab Ezzouar, Algiers, Algeria;4. CristalInnov, Cleanspace 354 Voie Magellan, Sainte-Hélène du Lac 73800, France;1. School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, Zhejiang 315211, China;2. State Key Laboratory of Crystal Material, Shandong University, Jinan, Shandong 250100, China;3. Research Institute of Tsinghua University in Shenzhen, Shenzhen, Guangdong 518057, China;1. Department of Mechanical Engineering and Materials Science, University of Pittsburgh, PA 15261, United States;2. Materials Research Institute, the Pennsylvania State University, University Park, PA 16802, United States |
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| Abstract: | Piezoelectric single crystals of Ca3NbX3Si2O14 (CNXS, X=Ga and Al) with ordered langasite structure were successfully grown using the Czochralski technique. The structure was analyzed by X-ray powder diffraction, and the lattice parameters for CNAS were found to decrease slightly when compared to CNGS, due to the smaller ion radius of Al. The dielectric, piezoelectric and electromechanical properties were studied as function of temperature from 30 °C to 900 °C, showing a stable temperature-dependent behavior. Of particular significant is their high mechanical quality factor and electrical resistivity at elevated temperature, demonstrating CNXS crystals to be promising candidates for high-temperature applications. |
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