Articles
  • Preparation of magnetic barium ferrite powders by microwave hydrothermal method
  • Xuan Shi, Yongping Pu* and Dan Liu
  • School of Materials Science & engineering, Shaanxi University of Science and Technology, Shaanxi Xi'an 710021, China
Abstract
Barium ferrite (BaFe12O19) particles were prepared using microwave hydrothermal synthesis with Fe(NO3)3 and Ba(NO3)2 as starting materials. The phase composition, crystallography and morphology of BaFe12O19 were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), differential scanning caborimetry (DSC), FT-IR spectra and vibrating-sample magnetometer (VSM). The results showed that nanosized hexagonal barium ferrite was synthesized when Ba/Fe ratio molar was 1 : 8 and annealed at 900 οC for 30 minutes. Meanwhile the different morphologies of BaFe12O19 could be influenced by Ba/Fe molar ratio and reaction time. For sample, the saturation magnetization (σs) was 61 emu/g, coercive force (Hc) was 4800 Oe.

Keywords: Microwave hydrothermal, Barium ferrite, Magnetic property

This Article

  • 2012; 13(S2): 414-417

    Published on Nov 30, 2012

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