Ceramics-Silikáty 58, (1) 33 - 38 (2014) |
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PRODUCTION, DIELECTRIC PROPERTY AND MICROWAVE ABSORPTION PROPERTY OF SiC(Fe) SOLID SOLUTION POWDER BY SOL-GEL METHOD
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Su Xiaolei, Jia Yan, Liu Xiaoqin,
Wang Junbo,
Xu Jie,
He Xinhai,
Fu Chong,
Liu Songtao
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College of Mechanical and Electronic Engineering, Xi an Polytechnic University,
Xi an, Shaanxi 710048, PR China
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Keywords: Silicon carbide, Sol-gel, Dielectric properties
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SiC(Fe) solid solution powders were synthesized by sol-gel method under different reaction time, using methyltriethoxysilane
as the silicon and carbon source and analytic ferric chloride as the dopant, respectively. The synthesized powders have been
characterized by XRD, SEM and Raman spectra. Results show that the lattice constant decreases with increasing reaction
time. The electric permittivities of SiC samples were determined in the frequency range of 8.2 ~ 12.4 GHz. Results show
that the permittivity of SiC decreases with increasing reaction time. The SiC(Fe) solid solution powder with reaction time of
4 h with 2 mm thickness exhibit the best microwave absorption property in X-band range (8.2 - 12.4 GHz). The microwave
absorption mechanism has been discussed |
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