Controlling the structural, microstructure and magnetic properties of barium W-type hexaferrite elaborated using tartaric acid precursor strategy

  • M. M. Hessien
  • D. A. Rayan
  • M. H. H. Mahmoud
  • A. Alhadhrami
  • M. M. Rashad


In this study, barium W-type hexaferrite (BaCo2Fe16O27) nanopowders have purposefully fabricated through tartaric acid precursor method using inexpensive starting materials. In this regards, the impact of the synthesis conditions namely the annealing temperature and the Ba:Co molar ratio on the crystal structure, crystallite size, microstructure and magnetic structure was explored using X-ray diffraction, scanning electron microscopy and vibrating sample magnetometer. For instance, well crystalline W-type hexaferrite was realized for the precursors annealed at a low temperature of 1100 °C for 2 h using two different Ba:Co molar ratios of 1.1:2.2 and 1.2:2.4. The crystallite size, the lattice constant, the aspect ratio as well as the unit cell volume were substantially affected with the Ba:Co molar ratio and the annealing temperature. Remarkably, the morphology of hexaferrite powders can be controlled by adjusting the annealing temperature and the Ba:Co molar ratio. Clearly, the microstructure of the formed powders was improved to a hexagonal platelet-like structure by raising the annealing temperature. Eventually, maximum saturation magnetization Ms = 72.3 emu/g was accomplished for W-hexaferrite particles obtained with Ba:Co molar ratio 1.1:2.2 annealed at 1350 °C for 2 h. Wide coercivities (196–1097 Oe) were achieved at the different synthesis conditions.



The authors would like to extend their truthful appreciation to the Deanship of Scientific Research at Taif University, Saudi Arabia for its financial support of this research through the research Group Projects No. 4387-436-1.


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • M. M. Hessien
    • 1
    • 2
  • D. A. Rayan
    • 2
  • M. H. H. Mahmoud
    • 1
    • 2
  • A. Alhadhrami
    • 1
  • M. M. Rashad
    • 2
  1. 1.Department of Chemistry, Faculty of ScienceTaif UniversityTaifSaudi Arabia
  2. 2.Central Metallurgical Research and Development Institute (CMRDI)HelwanEgypt

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