首页|Growth and Characterization of Bismuth Magnesium Titanate Bi(Mg_(1/2)Ti_(1/2))O_3

Growth and Characterization of Bismuth Magnesium Titanate Bi(Mg_(1/2)Ti_(1/2))O_3

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  • Trans Tech Publications Ltd
A new oxide, Bi(Mg_(1/2)Ti_(1/2))O_3 was prepared using a high-pressure high-temperature technique at 8 GPa and 1000℃. As-sintered Bi(Mg_(1/2)Ti_(1/2))O_3 has the BiFeO_3-type perovskite structure with the rhombohedral R3c. After ground, crystal structure changed to tetragonal P4mm. Structure parameters of tetragonal Bi(Mg_(1/2)Ti_(1/2))O_3 were refined from laboratory X-ray powder diffraction data (a = 4.033(10) A, and c = 3.938(10) A). Bi(Mg_(1/2)Ti_(1/2))O_3 does not decompress at ambient pressure, but the structure changed from rhombohedral to tetragonal on heating above 800℃. This phase transition was nonreversible. Bi(Mg_(1/2)Ti_(1/2))O_3 is expected to be one of the end members of lead-free ferroelectric materials.

Bi(Mg_(1/2)Ti_(1/2))O_3high-pressure synthesiscrystal structure

Yasuhiro Yoneda、Hiroyuki Saitoh、Kenji Yoshii、Takashi Nishida、Hironori Hayakawa、Naoshi Ikeda

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Japan Atomic Energy Agency (JAEA), Synchrotron Radiation Research Unit, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan

Graduate School of Material Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan

Department of Physics, Okayama University, 3-1-1 Tsushima-naka, Okayama 700-8530, Japan

2010

10.4028/www.scientific.net/KEM.421-422.30

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.421/422
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