Design of novel soft magnetic composites based on Fe/resin modified with silica

Mechanical, magnetic and electrical properties of a novel family of soft magnetic composites (SMCs) are studied in detail. The phenolic resin serving as electrical insulating layer in designed Fe/resin composites was modified by 3-glycidoxypropyltrimethoxysilane and tetraethylorthosilicate. The chem...

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Bibliographic Details
Published in:Materials letters 2013-06, Vol.101, p.37-40
Main Authors: Strečková, M., Medvecký, Ľ., Füzer, J., Kollár, P., Bureš, R., Fáberová, M.
Format: Article
Language:English
Subjects:
chemical bonding
electrical properties
Fourier transform infrared spectroscopy
hardness
Insulating layers
Iron
Magnetic materials
Magnetic properties
permeability
Phenolic resins
Polymer matrix composites
Polymeric composites
Polymers
Powder technology
Resins
silica
Silicon dioxide
Sol–gel preparation
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Summary:Mechanical, magnetic and electrical properties of a novel family of soft magnetic composites (SMCs) are studied in detail. The phenolic resin serving as electrical insulating layer in designed Fe/resin composites was modified by 3-glycidoxypropyltrimethoxysilane and tetraethylorthosilicate. The chemical bonding between organic and inorganic parts of a polymer matrix was confirmed by FTIR spectroscopy. Mechanical hardness, flexural strength and distribution of SiO2 nano-particles were substantially improved by using silane coupling agents. The hybrid insulating layer results in a defect-free structure of prepared green compacts, which consequently exhibit a higher permeability and lower eddy current losses. [Display omitted] •Soft magnetic composite based on Fe powder and hybrid resin were designed.•SiO2-nanocomposite polymer matrix represents electrically insulating layer.•Hybrid polymer improves the thermal and mechanical resistance of composites.•Homogeneous microstructure provides lower eddy currents in prepared composites.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2013.03.067