Low temperature synthesis of tetragonal BaTiO3 by a novel composite-hydroxide-mediated approach and its dielectric properties |
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| Authors: | Yahong Xie Shu Yin Takatoshi Hashimoto Yuichi Tokano Atsushi Sasaki Tsugio Sato |
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| Affiliation: | 1. Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan;2. NEC Tokin Corporation, Koriyama, Taihaku-ku, Sendai 980-8510, Japan;1. School of Chemistry, Dalian University of Technology, Dalian 116024, China;2. Environmental Protection Research Institute of Light Industry, Beijing 100089, China;1. Laser Industrial Technology Research Group, Korea Institute of Machinery and Materials (KIMM), 48, Mieumsandan 5-ro 41beon-gil, Busan 46744, Republic of Korea;2. Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea;3. School of Materials Science and Engineering, Kyungpook National University (KNU), 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea;4. Busan Center, Korea Basic Science Institute (KBSI), 30, Gwahaksandan 1-ro 60beon-gil, Busan 46742, Republic of Korea;5. UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50, UNIST-gil, Ulsan 44919, Republic of Korea;1. International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam 686560, Kerala, India;2. Department of Physics, Osmania University, Hyderabad 500007, India;3. Department of Physics, Mekelle University, Mekelle, Ethiopia;4. School of Chemical Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India;5. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686560, Kerala, India |
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| Abstract: | High purity tetragonal BaTiO3 powders were synthesized by a composite-hydroxide-mediated approach at low temperature using a novel hydrothermal reaction apparatus with a rolling system. The optimum synthesis conditions were explored, and the obtained samples were characterized by their XRD, TEM, TG-DTA and SEM. The powders with an average size of 150 nm in diameter were sintered to almost full theoretical density (ca. 99%) at 1200 °C for 5 h and the obtained ceramics presented a high dielectric constant (9500 at the Curie temperature). |
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