Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 492, Issue 1-2, Pages L16-L19Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2009.11.097
Keywords
Silicon carbide; Combustion; Dielectric property
Categories
Funding
- Xi'an Polytechnic University [BS0911]
- State Key Laboratory of Solidification Processing in NWPU [KP200901]
- Natural Science Basic Research Plan in Shaanxi Province of China [2009JQ6009]
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Al-doped SiC powders were synthesized via combustion reaction of the Si/C system in a 0.1 MPa nitrogen atmosphere using alumina as the dopant. 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 increases with the increasing alumina contents. The real part epsilon' and imaginary part epsilon '' of permittivity of the sample increase by about 20% and 60%, respectively, when the alumina content is 5%. The improvement mechanism in permittivity by doping has been discussed. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
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