A Comparative Study of Insulators on Magnetic Properties of Sendust Based Nanocomposite Powder Cores
Publish place: Journal of Optoelectronical Nanostructures، Vol: 3، Issue: 4
Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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JR_JOPN-3-4_001
تاریخ نمایه سازی: 25 بهمن 1402
Abstract:
In this study, Sendust (Fe۸۵Si۹.۶Al۵.۴) nanostructure alloy was prepared bymechanical alloying and was characterized by X-ray diffraction. In addition, the alloy’smorphology and its distribution particle size were investigated by scanning electronmicroscopy method. The alloyed powders were insulated with ۴wt% of three differentinsulating materials including polyvinyl alcohol, epoxy resin, and sodium silicate. Then,۰.۵ wt% zinc stearate was added as a lubricant and the composites were formed at apressure of ۱۶۰۰ MPa in a torodial die. These cores were annealed in Ar atmosphere at۳۵۰ to ۴۵۰ ºC for ۱ h. Some of the magnetic parameters of the as-milled and annealedsamples were measured and compared with each other in the frequency range of ۴ to۱۰۰۰ kHz. The results showed that polyvinyl alcohol is not a suitable insulating agentfor insulating this alloy. In addition, the real part of the initial magnetic permeability ofthe magnetic powder core insulated by sodium silicate in comparison with that insulatedby epoxy resin is a bit smaller, but more reduction of the imaginary part of formerresults in an increase the Q-factor throughout measuring frequency range. The resultsshow that annealing is more effective on improvement of the measured magneticproperties of the samples insulated with sodium silicate than that insulated with epoxyresin.
Keywords:
Soft Magnetic Composite Powder Cores , Epoxy Resin Insulator , Sodium Silicate Insulator , Magnetic Permeability , Q-Factor
Authors
Maryam Amoohadi
Department of Physics, Payamenoor University, Iran
Morteza Mozaffari
Department of Physics, Faculty of Science, University of Isfahan, Isfahan, Iran
Abdolrasoul Gharaati
Department of Physics, Payamenoor University, Iran
Mohammad Rezazadeh
Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran
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