BiFeO₃ Nanoparticles Prepared by NaNO₃-Assisted Low-Heating Temperature Solid State Reaction Method

Abstract:

BiFeO₃ nanoparticles were synthesized by a NaNO₃-assisted low-heating temperature solid state reaction method. The effects of the molar ratio of added NaNO₃ and the calcination temperature on the characteristics of the products were discussed. The structure, morphology, magnetic, optical and electrical properties of BiFeO₃ were characterized by XRD, SEM, VSM and UV-VIS. The experimental results showed that the introduction of leachable inert inorganic salt as a hard agglomeration inhibitor in the mixture precursor led to the formation of BiFeO₃ nanoparticles with uniform size. With the addition of NaNO₃ in the process, the particle morphology decreased from a diameter of 300-500 nm to 80-100 nm. The BiFeO₃ attained at 600 °C showed a smaller band gap (2.12 eV) and weak ferromagnetism at room temperature with a remnant magnetization value (Mr) of approximately 3.1×10^-5 emu/g and a coercive filed value (Hc) of nearly 20 Oe.

• Periodical: Materials Science Forum (Volumes 745-746)
• Pages: 113-118
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.745-746.113
• Online since: February 2013
• Authors: Lei Wang, Xue Ying Chen, Jin Bao Xu, Liang Bian, Bo Gao
• Keywords: BiFeO₃, Low-Heating Temperature Solid State Reaction, Nanoparticle

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