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Influence of the Mole Ratio, Sintering Condition and Particle Size on the Magnetic Properties of BaFe 12 O 19 Synthesized by Ceramic Method
Author(s) -
ElLawindy A. M. Y.,
Mansour S. A.,
Hafiz Mohamed,
Hassan H. H.,
Ali A. A.
Publication year - 2010
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2009.02398.x
Subject(s) - materials science , coercivity , sintering , barium ferrite , ceramic , analytical chemistry (journal) , particle size , scanning electron microscope , ferrite (magnet) , barium , grain size , magnetometer , atmospheric temperature range , microstructure , magnetization , diffraction , metallurgy , composite material , condensed matter physics , chemical engineering , magnetic field , thermodynamics , optics , chemistry , physics , chromatography , engineering , quantum mechanics
Barium ferrite (BaFe 12 O 19 ) with different particle sizes were successfully synthesized by solid‐state reaction (ceramic method) using locally available low cost α‐Fe 2 O 3 mixed with BaO 2 . The prepared samples were sintered in the temperature range of 950° to 1200°C for 1.5 to 6 h. The prepared products of barium ferrite were characterized by X‐ray diffraction, a scanning electron microscope, and a vibrating sample magnetometer. The effect of mole ratio, sintering temperature, and time was studied. A further addition of 10% BaO 2 to the mole ratio (BaO 2 :5.7Fe 2 O 3 ), and removing the particle size <63 μm, exhibits a pure phase BaFe 12 O 19 . The saturation magnetization reached the optimum value of M s =∼67 emu/g with coercivity of 2596 Oe, under sintering temperature up to 1100°C for 4.5 h.