The structural and magnetic properties of barium ferrite powders prepared by the sol–gel method

doi:10.1088/1674-1056/21/1/017501

Abstract In this paper, M-type hexagonal barium ferrite powders are synthesized using the sol-gel method. A dried precursor heated in air is analyzed in the temperature range from 50 to 1200 ℃ using thermo-gravimetric analysis and differential scanning calorimetry. The effects of the additives and the cacinating temperature on the magnetic properties are investigated, and the results show that single-phase barium ferrite powders can be formed. After heat-treating at 950 ℃ for 4h with 3 wt% additive, the coercivity and saturation magnetization are found to be 440 Oe and 57.9 emu/g, respectively.

Keywords: barium ferrite sol-gel method powder magnetic property

Received: 19 July 2011
Revised: 01 September 2011
Accepted manuscript online:

PACS:	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)
	75.75.Lf	(Electronic structure of magnetic nanoparticles)
	75.60.Nt	(Magnetic annealing and temperature-hysteresis effects)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2007CB310407), the Science Fund for Creative Research Groups of the National Natural Science Foundation of China (Grant No. 61021061), the National Natural Youth Fund of China (G

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Li Jie(李颉), Zhang Huai-Wu(张怀武), Li Yuan-Xun(李元勋), Liu Ying-Li(刘颖力), and Ma Yan-Bing(马岩冰) The structural and magnetic properties of barium ferrite powders prepared by the sol–gel method 2012 Chin. Phys. B 21 017501

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The structural and magnetic properties of barium ferrite powders prepared by the sol–gel method

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