Characterization of electromagnetic wave absorbing properties of sic-based and alumina ceramic woven fabrics

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2008

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Tan, Elvan

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Electromagnetic wave absorbing properties of SiC-based and alumina ceramic woven fabrics have been investigated. Electrical conductivities of SiC-based ceramic woven fabrics were modified by heat treatment in air resulting in their oxidation. Surface properties of alumina woven fabrics were altered by gold-sputtering resulting in a high conductivity layer on the surface of the wovens. Electromagnetic wave interactions of single layer and double layered combinations of these ceramic woven fabrics were determined in 17-40 GHz frequency range using “free-space” method. Electromagnetic wave absorption potential of ceramic woven fabrics with different chemical compositions and woven types were correlated with their material properties by X-ray diffraction, scanning electron microscopy and electrical conductivity measurements. Effects of modifications and varying woven fabric arrangements in combinations on the electromagnetic wave absorption potential of the ceramic woven fabrics have been discussed. Various double layer combinations of SiC-based and alumina woven fabrics revealed a promising potential in terms of both reduced reflection and transmission resulting in more than ~95% absorption in millimeter wavelength range, which makes them powerful candidate materials for electromagnetic wave absorption applications.

Subject Keywords

Metallurgical and Materials Engineering., Electromagnetic.

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http://etd.lib.metu.edu.tr/upload/3/12609619/index.pdf
https://hdl.handle.net/11511/18115

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

E. Tan, “Characterization of electromagnetic wave absorbing properties of sic-based and alumina ceramic woven fabrics,” M.S. - Master of Science, Middle East Technical University, 2008.