Growth and Characterization of Bismuth Magnesium Titanate Bi(Mg1/2Ti1/2)O3 |
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| Journal | Key Engineering Materials (Volumes 421 - 422) |
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| Volume | Asian Ceramic Science for Electronics III and Electroceramics in Japan XII |
| Edited by | Tadashi Takenaka, Hajime Haneda, Kazumi Kato, Masasuke Takata and Kazuo Shinozaki |
| Pages | 30-33 |
| DOI | 10.4028/www.scientific.net/KEM.421-422.30 |
| Citation | Yasuhiro Yoneda et al., 2009, Key Engineering Materials, 421-422, 30 |
| Online since | December, 2009 |
| Authors | Yasuhiro Yoneda, Hiroyuki Saitoh, Kenji Yoshii, Takashi Nishida, Hironori Hayakawa, Naoshi Ikeda |
| Keywords | Bi(Mg1/2Ti1/2)O3, Crystal Structure, High Pressure Synthesis |
| Abstract | A new oxide, Bi(Mg1/2Ti1/2)O3 was prepared using a high-pressure high-temperature technique at 8 GPa and 1000ºC. As-sintered Bi(Mg1/2Ti1/2)O3 has the BiFeO3-type perovskite structure with the rhombohedral R3c. After ground, crystal structure changed to tetragonal P4mm. Structure parameters of tetragonal Bi(Mg1/2Ti1/2)O3 were refined from laboratory X-ray powder diffraction data (a = 4.033(10) Å, and c = 3.938(10) Å). Bi(Mg1/2Ti1/2)O3 does not decompress at ambient pressure, but the structure changed from rhombohedral to tetragonal on heating above 800°C. This phase transition was nonreversible. Bi(Mg1/2Ti1/2)O3 is expected to be one of the end members of lead-free ferroelectric materials. |
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