Synthesis and piezoelectric properties of Li-doped BaTiO3 by a solvothermal approach |
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Authors: | Takeshi Kimura Qiang Dong Shu Yin Takatoshi Hashimoto Atsushi Sasaki Tsugio Sato |
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Affiliation: | 1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai 980-8577, Japan;2. NEC Tokin Corporation, 6-7-1 Koriyama, Taihaku-ku, Sendai 980-8510, Japan |
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Abstract: | Li-doped BaTiO3 particles with the Li+ mole fraction, x, of 0–0.06 were synthesized by a solvothermal approach at 200 °C. The products consisted of nanoparticles of 50–100 nm in diameter. The sinterability and piezoelectric property of Li-doped BaTiO3 were improved by doping with Li ion, i.e., the Li-doped BaTiO3 samples could be sintered to almost full theoretical density (>95%) at a low temperature such as 1100 °C, and the highest piezoelectric constant, d33 (260 pC/N) and electromechanical coupling factor, kp (43.7%) could be realized at x value of 0.03. The Curie temperatures of all samples were around 130 °C, and did not change very much depending on the amount of Li-doping. |
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