Phase Formation, Microstructure and Magnetic Properties of NiCuZn Ferrites with Bi₂O₃ Additive

Abstract:

The ferrites (Ni_0.2Cu_0.2Zn_0.6)_1.02(Fe₂O₄)_0.98 were prepared by standard solid state method and sintered at different temperatures. The effects of different Bi₂O₃ additives (0<x<5 wt%) on the phase formation, crystal structure and properties were investigated. The results of thermal analysis (DSC) showed that Bi₂O₃ played an important role in the process of sintering. The magnetization and the permeability were measured at room temperature, with increasing of Bi₂O₃ amount, the saturation magnetization had no obvious change and the initial permeability decreased from 291.2 to 197.6. SEM micrographs showed that the average grain size decreased with increasing Bi₂O₃ contents, but more Bi₂O₃ (x≥4wt %) additives may resulted in the abnormal grain growth.

• Periodical: Materials Science Forum (Volume 787)
• Pages: 317-321
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.787.317
• Online since: April 2014
• Authors: Qiang Li*, Yuan Xun Li, Jie Li, Guo Liang Yu, Huai Wu Zhang
• Keywords: Bi₂O₃ Additive, Magnetic Property, NiCuZn Ferrite, Phase Formation

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