Growth and Characterization of Bismuth Magnesium Titanate Bi(Mg1/2Ti1/2)O3

Abstract:

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A new oxide, Bi(Mg1/2Ti1/2)O3 was prepared using a high-pressure high-temperature technique at 8 GPa and 1000°C. 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.

Info:

Periodical:

Key Engineering Materials (Volumes 421-422)

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:

Y. Yoneda et al., "Growth and Characterization of Bismuth Magnesium Titanate Bi(Mg1/2Ti1/2)O3", Key Engineering Materials, Vols. 421-422, pp. 30-33, 2010

Online since:

December 2009

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$35.00

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