Microwave-hydrothermal synthesis of nano-sized Sn2+-doped BaTiO3 powders and dielectric properties of corresponding ceramics obtained by spark plasma sintering method |
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Authors: | Yahong Xie Shu Yin Takatoshi Hashimoto Hisamichi Kimura 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;(3) Institute of Material Research, Tohoku University, Sendai 980-8577, Japan |
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Abstract: | Ternary oxides containing Sn2+ are rare and difficult to prepare using solid state reaction due to disproportionation of Sn2+ at high temperature. In this paper, nanoparticles of barium titanate doped with different amounts of Sn2+ consisting of single phase perovskite structure were successfully synthesized for the first time by using a microwave-assisted solvothermal reaction. The particle sizes were about 20–40 nm in diameter and increased with increasing the amount of doped tin. Solidified ceramic bodies were obtained using a spark plasma sintering method under argon atmosphere avoiding the disproportionation and oxidation of Sn2+ in the air. The grain size and dielectric constant of the sintered body decreased with increasing the amount of doped tin. |
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