Effect of Bi2O3 Content and Sintering Temperature on the Frequency-Dependent Magnetic Properties of Nanosized Barium Hexaferrite

Year : 2025 | Volume : 13 | Special Issue 05 | Page : 107 113
    By

    Vivek A. Rane,

  • Vijaya D. Giramkar,

  • Shany Joseph,

  1. Assistant Professor, Department of Physics, G. M. Vedak College of Science, Tala, Raigad, Maharashtra, India
  2. Support Technical, Electronic Packaging Division, Centre for Materials for Electronics Technology (C-MET), Panchawati, Pune, Maharashtra, India
  3. Scientist, Electronic Packaging Division, Centre for Materials for Electronics Technology (C-MET), Panchawati, Pune, Maharashtra, India

Abstract

The magnetic properties of commercially available nanosized barium hexaferrite (BaFe12O19) are studied. The particles were characterized using X-ray diffraction (XRD), vibrating sample magnetometer (VSM), and high-frequency magnetic measurements. The frequency-dependent magnetic properties viz. complex permeability and loss tangent were analyzed within the 10 MHz to 1 GHz range. Variations in complex magnetic permeability and loss tangent were discussed under varying sintering parameters such as temperature and sintering aid content. The study attempts to explain the effect of nanosized starting materials on the observed permeability dispersion. The result shows good crystallinity and low saturation magnetization of the barium hexaferrite nanoparticles. The high-temperature sintering, assisted by Bi2O3, enhances permeability values due to particle size increase, but also introduces magnetic losses. Specifically, permeability of 2.1 was observed in the specimen sintered at 1000°C for 2 hours with 4 wt% Bi2O3. Optimizing sintering temperature and Bi2O3 content can achieve the best permeability value while minimizing magnetic losses. The single and two distinct dispersions in the permeability were observed for the specimen sintered at 900 and 1000oC, respectively. The permeability spectra indicate that dispersion is dependent on particle size, with single and multi-domain particle nature in the sintered specimens explaining the permeability dispersions. Future work may focus on studying particle size in sintered specimens using scanning electron micrographs to further understand the material’s resonances. This approach underscores the potential of using nanopowder before sintering and controlling particle growth for optimal magnetic properties.

Keywords: Barium hexaferrite, nano-ferrites, complex permeability, permeability dispersion, loss tangent

[This article belongs to Special Issue under section in Journal of Polymer and Composites (jopc)]

How to cite this article:
Vivek A. Rane, Vijaya D. Giramkar, Shany Joseph. Effect of Bi2O3 Content and Sintering Temperature on the Frequency-Dependent Magnetic Properties of Nanosized Barium Hexaferrite. Journal of Polymer and Composites. 2025; 13(05):107-113.
How to cite this URL:
Vivek A. Rane, Vijaya D. Giramkar, Shany Joseph. Effect of Bi2O3 Content and Sintering Temperature on the Frequency-Dependent Magnetic Properties of Nanosized Barium Hexaferrite. Journal of Polymer and Composites. 2025; 13(05):107-113. Available from: https://journals.stmjournals.com/jopc/article=2025/view=217266


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Special Issue Subscription Original Research
Volume 13
Special Issue 05
Received 16/01/2025
Accepted 21/03/2025
Published 19/07/2025
Publication Time 184 Days
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