Influence of Bi2O3 on the Structure and Magnetic Properties of Barium Ferrite Powders Materials

Jie Li; Huai Wu Zhang; Yuan Xun Li; Hua Su; Yan Bing Ma

doi:10.4028/www.scientific.net/AMR.499.31

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Influence of Bi₂O₃ on the Structure and Magnetic Properties of Barium Ferrite Powders Materials

Abstract:

In this study, influence of Bi₂O₃ on the structure and magnetic properties of barium ferrites has been studied in samples performed by using the solid-state reaction method. Samples, prepared with different amount of sintering additive are sintered at temperatures from 850°C to 950°C. The scanning electron microscope micrographs shows that the samples with 3wt% additive, calcinated at 900°C, have a particle size smaller than 1μm. Annealing treatment in air at 950°C led to an order-of-magnitude increase of the saturation magnetization of 60.42emu/g and coercive force of 4150.5Oe, which are due to the liquid phase sintering mechanism and the increasing grain size.