Microstructure and effective modeling of the microwave permittivity of nano SiC(N) composite powder

Dong Lin Zhao, Fa Luo, Wan Cheng Zhou

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

The nano SiC(N) composite powder was synthesized from hexamethyldisilazane ((Me3Si)2NH) (Me:CH3) by a laser-induced gas-phase reaction. The microwave permittivity of the nano SiC(N) composite powder and paraffin wax (or other dielectric materials) composites can be tailored by the content of this nano powder. The dissipation factors (tgδ) of the nano SiC(N) composite powder are high at the microwave frequencies. And ε′, ε″ and tgδ of composites increase with the volume filling factor (v) of nano SiC(N) powder. The nano SiC(N) composite powder would be a good candidate for microwave absorbing material and electromagnetic interface (EMI) shielding material. The classical effective medium functions can not effectively model the microwave permittivities of the SiC(N) nanocomposites. We found that the microwave permittivities of the nanocomposites can be effectively modeled using second-order polynomials. These polynomials are dependent only on the filling factor and are purely mathematical models. The ε′ and ε″ of nanocomposites can be effectively modeled using second-order polynomials (ε′, ε″=Av2+Bv+C).

Original languageEnglish
Title of host publicationAICAM 2005 - Proceedings of the Asian International Conference on Advanced Materials
PublisherTrans Tech Publications
Pages141-144
Number of pages4
ISBN (Print)0878499792, 9780878499793
DOIs
StatePublished - 2006
EventAICAM 2005 - Asian International Conference on Advanced Materials - Beijing, China
Duration: 3 Nov 20055 Nov 2005

Publication series

NameAdvanced Materials Research
Volume11-12
ISSN (Print)1022-6680

Conference

ConferenceAICAM 2005 - Asian International Conference on Advanced Materials
Country/TerritoryChina
CityBeijing
Period3/11/055/11/05

Keywords

  • Microwave absorbing material
  • Microwave permittivity
  • Nano SiC(N) powder

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