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Magnetic, Micro-structural, and Optical Properties of Hexaferrite, BaFe12O19 Materials Synthesized by Salt Flux-Assisted Method

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Abstract

This paper reports the eco-friendly synthesized BaFe12O19 phase materials by a molten salt flux approach and their experimental findings. The reaction mixture (BaCO3 and Fe2 O 3) annealed with the mixture of salt (NaCl:KCl) flux yielded good quality nanocrystalline hexagonal ferrite BaFe12O19 phase materials. The plate-like hexagonal-shaped BaFe12O19 phase morphology with random particle sizes of ∼370 to 940 nm is seen for the good quality flux-annealed sample. The room-temperature magnetic hysteresis loop of the BaFe12O19 sample exhibits hard ferromagnetic saturation magnetization (M s) of 50.23 emu/g at 15 kOe, and coercive field (H c) is 3500 Oe. The determined energy bandgap (E g) is found to be 3.58 eV for the BaFe12O19 phase material. The Fourier transform infrared (FT-IR) spectral features confirm the presence of Fe–O and Ba–O bonds in the flux-synthesized BaFe12O19 materials. The photoluminescence (PL) emission peak (∼360 nm) intensity of BaFe12O19 materials varies regardless of annealing temperatures. The different salt flux-synthesized BaFe12O19 materials appear as brown- and dark gray-colored powders that can be applied as a ceramic color pigment due to its high NIR reflectivity.

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Acknowledgments

Author S. Balamurugan is thankful to the Tamil Nadu State Council for Science and Technology (TNSCST) (Ref.: AR/PS/2012-2013/209) for the partial support to the present work. Author B. C. Brightlin would also like to thank the TNSCST for working as the project assistant in the funded project. The authors acknowledge the Central Instrumentation Facility (CIF) of Pondicherry University and the Nanotechnology Research Centre (NRC) of SRM University, India, for the VSM measurement and HRSEM-EDX analysis, respectively. Further, the authors are grateful to the Noorul Islam Centre for Higher Education for the encouragement.

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  1. Advanced Nanomaterials Research Laboratory, Department of Nanotechnology, Noorul Islam Centre for Higher Education, Kumaracoil, Thuckalay, 629 180, Tamil Nadu, India

    B. C. Brightlin & S. Balamurugan

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Correspondence to S. Balamurugan.

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Brightlin, B.C., Balamurugan, S. Magnetic, Micro-structural, and Optical Properties of Hexaferrite, BaFe12O19 Materials Synthesized by Salt Flux-Assisted Method. J Supercond Nov Magn 30, 215–225 (2017). https://doi.org/10.1007/s10948-016-3703-z

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