1. Corrosion-resistive magnetic powder Fe@SiO2 for microwave applications.
- Author
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Maklakov, Sergey S., Lagarkov, Andrey N., Maklakov, Sergey A., Adamovich, Yulia A., Petrov, Dmitry A., Rozanov, Konstantin N., Ryzhikov, Ilya A., Zarubina, Alexandra Yu., Pokholok, Konstantin V., and Filimonov, Dmitry S.
- Subjects
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IRON powder , *MAGNETIC particles , *MICROWAVES , *SURFACE coatings , *ELECTRON microscopy - Abstract
Iron powder particles were coated with a thin SiO 2 shell for protection of corrosion. Dynamic magnetic behavior of the as-synthesized material was studied in comparison with uncoated metal in terms of frequency dispersion of the microwave permeability and permittivity. A uniform 100-nm SiO 2 shell provides durable corrosion resistance to a 4.5-μm carbonyl iron powder. The shell was deposited through tetraethyl orthosilicate hydrolysis of technical grade chemicals. It was shown that the shell did not influence the magnetic properties of the iron powder. Electron microscopy, particle size analysis, and γ-resonance spectroscopy were applied in the study. The deposited SiO 2 decreased the microwave permeability value and prevented percolation conductivity in a composite with a paraffin wax dielectric matrix. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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