Effect of average grain size and sintered relative density on the imaginary part – µ″ of the complex magnetic permeability of (Cu0.12Ni0.23Zn0.65)Fe2O4 system

The influence of the sintered microstructure on the electromagnetic properties of Cu-doped NiZn ferrites were investigated. Two of the main variables of the thermal cycle have been modified: the maximum sintering temperature and the dwell time at that temperature, or sintering time. The evolution of...

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Bibliographic Details
Published in:Ceramics international 2016-02, Vol.42 (3), p.4256-4261
Main Authors: Clausell, Carolina, Barba, Antonio, Nuño, Luis, Jarque, Juan Carlos
Format: Article
Language:English
Subjects:
Ferrites
Grain size
Magnetic permeability
Sintered relative density
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Summary:The influence of the sintered microstructure on the electromagnetic properties of Cu-doped NiZn ferrites were investigated. Two of the main variables of the thermal cycle have been modified: the maximum sintering temperature and the dwell time at that temperature, or sintering time. The evolution of the imaginary part – µ″ of the complex magnetic permeability was studied as a function of relative density, grain size and amplitude of the grain size distribution of the sintered pieces. The results show that µ″ depends on the sintered microstructure and that there is a limiting value of the average grain size (~20–25µm) from which the electromagnetic properties of these kinds of materials worsened significantly.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2015.11.101