Dielectric property of Si3N4/SiBCN composite ceramics doped with SiC

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Abstract

Si3N4/SiBCN composite ceramics were prepared by infiltrating and pyrolyzing liquid polyborosilazane in porous Si3N4 ceramics. To increase their wave-absorbing ability, SiC nanoparticles and SiC film obtained by chemical vapor infiltration were separately introduced into the composite ceramics. The surface morphology, element and phase composition of ceramics were analyzed by means of scanning electron microscopy, energy dispersive spectrometer and X-ray diffraction. Dielectric and electromagnetic wave absorbing property researches show that the permittivity and dielectric loss of the ceramics were effectively improved and the electromagnetic reflection coefficient was visibly decreased when SiC was loaded. It is indicated that SiC is an effective dielectric lossy absorbent, and the Si3N4/SiBCN composite ceramics containing SiC possess the great potential in the application of wave-absorbing material.

Original languageEnglish
Title of host publicationMaterial and Manufacturing Technology IV
Pages91-95
Number of pages5
DOIs
StatePublished - 2013
Event2013 4th International Conference on Material and Manufacturing Technology, ICMMT 2013 - Seoul, Korea, Republic of
Duration: 11 May 201312 May 2013

Publication series

NameAdvanced Materials Research
Volume748
ISSN (Print)1022-6680

Conference

Conference2013 4th International Conference on Material and Manufacturing Technology, ICMMT 2013
Country/TerritoryKorea, Republic of
CitySeoul
Period11/05/1312/05/13

Keywords

  • Dielectric property
  • Electromagnetic wave absorbing property
  • SiBCN
  • SiC

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