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

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

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

Paper Titles

Domain Wall Engineering in Lead-Free Piezoelectric Materials
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Crystal Growth and Electrical Properties of Na_0.5Bi_0.5TiO₃-BaTiO₃ Lead-Free Ferroelectric Piezocrystals
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Piezoelectric Properties of c-Axis-Oriented (Sr,Ca)₂NaNb₅O₁₅ Piezoelectric Ceramics with Single-Plate Type and Multilayered Type Fabricated Using Crystal-Oriented Sheet Forming
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Preparation and Characterization of Lead Free Multi-Layer Ceramic Actuators with Ni Inner Electrodes Prepared by Inkjet Printing
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Growth and Characterization of Bismuth Magnesium Titanate Bi(Mg_1/2Ti_1/2)O₃
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Phase Diagram and Microstructure Analysis of Barium Titanate – Potassium Niobate System Piezoelectric Ceramics
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Crystal Structure Analysis of Barium Titanate – Bismuth Perovskite-Type Oxide System Ceramics and their Piezoelectric Property
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Electrical Properties and Phase Transition Behavior of (Li,Na,Ba)(Nb,Ti)O₃ Lead-Free Piezoelectric Ceramics
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Electrical Properties and Piezoelectric Properties of CaBi₂Ta₂O₉-Based Ceramics
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Growth and Characterization of Bismuth Magnesium Titanate Bi(Mg_1/2Ti_1/2)O₃

Abstract:

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.