Preparation and Properties of BN-SiO2 Composite Ceramics

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A series of BN-SiO2 composite ceramics with high relative densities have been fabricated by hot pressing of a mixture of hexagonal boron nitride powder and silica sol. X-ray diffraction (XRD) results show that silica are distributed in the BN matrix as noncrystalline state. Microstructure of as-sintered composite ceramics is observed by scanning electron microscopy (SEM). The influence of the secondary phase on the mechanical properties is studied by varying the silica content from 10 wt% up to 40 wt%. Dielectric properties of composite ceramics are also measured from 1 MHz to 2.0 GHz.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1426-1428

DOI:

10.4028/www.scientific.net/KEM.336-338.1426

Citation:

H. Z. Zhai et al., "Preparation and Properties of BN-SiO2 Composite Ceramics", Key Engineering Materials, Vols. 336-338, pp. 1426-1428, 2007

Online since:

April 2007

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$38.00

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