Dielectric Property of Si3N4/SiBCN Composite Ceramics Doped with SiC

Fang Ye; Li Tong Zhang; Xiao Wei Yin; Ya Jun Zhang; Yong Sheng Liu; Lai Fei Cheng

doi:10.4028/www.scientific.net/AMR.748.91

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 748Dielectric Property of Si3N4/SiBCN Composite...

Dielectric Property of Si₃N₄/SiBCN Composite Ceramics Doped with SiC

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.

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Advanced Materials Research (Volume 748)

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91-95

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https://doi.org/10.4028/www.scientific.net/AMR.748.91

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Online since:

August 2013

Authors:

Fang Ye, Li Tong Zhang, Xiao Wei Yin, Ya Jun Zhang, Yong Sheng Liu, Lai Fei Cheng

Keywords:

Dielectric Property, Electromagnetic Wave Absorbing Property, SiBCN, Silicon Carbide (SiC)

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