Combustion synthesis and microwave absorption property of SiC(Fe) solid solution powder under different reaction time

Xiaolei Su, Yan Jia, Junbo Wang, Jie Xu, Xinhai He, Chong Fu, Songtao Liu

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

SiC(Fe) solid solution powders were synthesized via combustion reaction of the Si and C system in a 0.1 MPa nitrogen atmosphere using iron as the dopant and PTFE as the chemical activator, under different reaction time. The microstructures of prepared powders have been characterized by the SEM, EDS, XRD and Raman spectra, respectively. Results indicate that the prepared powders have fine spherical particles and narrow particle size distribution. 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 the increasing reaction time. The Fe doped SiC powder with reaction time of 45 min with 2 mm or 2.5 mm thickness exhibit the best microwave absorption properties in the X-band range(8.2-12.4 GHz). A method to predict absorbing property in the other frequency range has been presented.

Original languageEnglish
Pages (from-to)1905-1912
Number of pages8
JournalJournal of Materials Science: Materials in Electronics
Volume24
Issue number6
DOIs
StatePublished - Jun 2013
Externally publishedYes

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