Preparation and Characterization of Multiferroics BiFeO3

doi:10.3724/SP.J.1077.2012.11741

Journal of Inorganic Materials ›› 2012, Vol. 27 ›› Issue (10): 1053-1057.DOI: 10.3724/SP.J.1077.2012.11741

• Research Paper • Previous Articles Next Articles

Preparation and Characterization of Multiferroics BiFeO₃

SONG Wei^1,2,3, WANG Xuan^1,2,3, ZHANG Dong^1,2,3, SUN Zhi^1,2,3, HAN Bai^1,2,3, HE Li-Juan^2,3, LEI Qing-Quan^1,2,3

(1. College of Electrical & Electronic Engineer, Harbin University of Science and Technology, Harbin 150080, China; 2. Key Laboratory of Engineering Dielectric and Its Application, Ministry of Education, Harbin 150080, China; 3. Heilongjiang Provincial Key Laboratory of Dielectrics Engineering, Harbin 150080, China)

Received:2011-11-30 Revised:2012-02-11 Published:2012-10-20 Online:2012-09-17
About author:SONG Wei. E-mail: sw7912@hrbust.edu.cn
Supported by:
National Basic Research Program of China (973 Program) (2009CB724505, 2012CB723308); National Natural Science Foundation of China(5097702)

Abstract

Abstract: The multiferroic materials BiFeO₃ nanopowders of dispersion uniformity were synthesized by the citric acid Sol-Gel method, using the iron(Ⅲ) nitrate and bismuth nitrate as the reactants and dilute nitric acid as the catalyst. The physical and chemical characteristics, such as structure, morphology and purity of BiFeO₃nanopowders were investigated by TG-DSC, XRD, FT-IR, SEM and AFM, respectively. The results indicate that the preparation and purity of BiFeO₃ nanopowders have a profound influence on the precursor solution pH value of sol process and the calcined temperature of the xerogel. The optimum reaction conditions are the precursor solution pH=7–8 and calcined temperature of 600℃. It is found that BiFeO₃ nanopowders with 100 nm in size, good dispersion and without Bi₂₅FeO₄₀and Bi₂Fe₄O₉ impurity phase are synthesized under the optimum reaction conditions. The saturation magnetization (Ms), the remanent magnetization (Mr) and the coercivity (Hc) of BiFeO₃ nanopowders under the optimum reaction conditions are 1.08 A·m²/kg, 0.13 A·m²/kg and 15.76 kA/m, respectively.

Key words: multiferroics, BiFeO₃, Sol-Gel, nanopowders

CLC Number:

TQ174

SONG Wei, WANG Xuan, ZHANG Dong, SUN Zhi, HAN Bai, HE Li-Juan, LEI Qing-Quan. Preparation and Characterization of Multiferroics BiFeO₃[J]. Journal of Inorganic Materials, 2012, 27(10): 1053-1057.

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Preparation and Characterization of Multiferroics BiFeO₃

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