Ceramics-Silikáty 53, (2) 113 - 117 (2009) |
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MORPHOLOGY-CONTROLLED HYDROTHERMAL SYNTHESIS OF BISMUTH FERRITE USING VARIOUS ALKALINE MINERALIZERS
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Hojamberdiev Mirabbos 1, Xu Yunhua 2, Wang Fazhan 2,
Wang Juan 2,
Liu Wengang 2,
Wang Mingqiong 2
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1 New York State College of Ceramics, Alfred University,
Alfred, NY 14802, United States of America
2 Shaanxi Key Laboratory of Nano-materials and technology, Xi’an University of Architecture and Technology,
Xi’an 710055, P.R. China
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Keywords: Bismuth ferrite, Hydrothermal synthesis, Mineralizer
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The present research reports fabrication of nano- and submicrometer-sized BiFeO₃ (BFO) powders from bismuth nitrate
and iron chloride by a simple hydrothermal method at 180°C for 16 h in the presence of various MOH mineralizers
(M = K⁺, Na⁺ and Li⁺). The final products were characterized by X-ray powder diffraction (XRD) and high-resolution
transmission electron microscope (HR-TEM). Alkaline mineralizers introduced at suitable concentration have been found to
play the key role in the formation of BFO crystallites with certain morphologies and sizes due to cationic radii of mineralizers
during the hydrothermal process. A nucleation and crystal growth mechanisms are proposed for the formation
of BFO crystallites in the size range of nano and submicrometer. |
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