Microwave absorption properties of single- and double-layer coatings based on strontium hexaferrite and graphite nanocomposite

The microwave absorption properties of single- and double-layer doped strontium hexaferrite (SrCoZnFe 16 O 27 ) and graphite nanocomposite were investigated. W-type SrCoZnFe 16 O 27 nanoparticles was prepared via solid state reaction using high energy ball milling and sintered at different sintering...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2018-08, Vol.29 (16), p.14031-14045
Main Authors: Rusly, Siti Nor Ain, Matori, Khamirul Amin, Ismail, Ismayadi, Abbas, Zulkifly, Awang, Zaiki, Zulkimi, Muhammad Misbah Muhamad, Idris, Fadzidah Mohd, Zaid, Mohd Hafiz Mohd, Zulfikri, Nor Dalilah
Format: Article
Language:English
Subjects:
Ball milling
Characterization and Evaluation of Materials
Chemistry and Materials Science
Electromagnetic wave transmission
Graphite
Matching
Matching layers (electronics)
Materials Science
Microwave absorption
Nanocomposites
Nanoparticles
Network analysers
Optical and Electronic Materials
Properties (attributes)
Reflection
Strontium
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Summary:The microwave absorption properties of single- and double-layer doped strontium hexaferrite (SrCoZnFe 16 O 27 ) and graphite nanocomposite were investigated. W-type SrCoZnFe 16 O 27 nanoparticles was prepared via solid state reaction using high energy ball milling and sintered at different sintering temperatures. Microwave absorption properties of single- and double-layer structures of different thicknesses were investigated in the frequency range of 8–18 GHz using a network analyzer, and their behavior analyzed based on electromagnetic transmission line theory. The results show that double-layer absorbing material showed better microwave absorption properties than single-layer. Double-layer absorbing material which consisted of graphite as the matching layer and SrCoZnFe 16 O 27 as the absorbing layer demonstrated higher reflection loss values of − 19.5 dB when both layers were 1 mm thick. The bandwidth corresponding to the reflection loss below − 10 dB (i.e. 90% absorption) was 3.8 GHz (11.0–14.8 GHz). The excellent microwave absorption properties of double-layer structures were influenced by good impedance match, multiple internal reflections and coupling interactions between the matching and absorbing layers.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-018-9535-9