Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 401, Issue -, Pages 1093-1096Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2015.10.129
Keywords
Solid state reaction; Tape casting; Average particle size (D-50); NiCuZn ferrite
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The effect of ferrite particle size on the magnetic spectra (1 MHz to 1 GHz) of NiCuZn polycrystalline ferrites doped with Co2O3 and Bi2O3 were systematically investigated. The experiments indicate that the ferrite particle size tailored by grinding time and corresponding sintering temperatures is crucial to achieving high permeability, high Q-factor and low magnetic loss, at 13.56 MHz for electromagnetic shielding applications especially in the near field communication (NFC) field. It is evident that high-performance NiZnCu ferrite materials are strongly tailored by morphology and microstructure. It is conclusive that fine ferrite particles and relatively low sintering temperatures are favorable to lowering magnetic loss and enhancing permeability. This work has built a foundation for improvement of the ferrite slurry used for fabrication of large area tape-casting ferrite sheets. (C) 2015 Elsevier B.V. All rights reserved.
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