Preparation and Properties of BN-SiO2 Composite Ceramics
Authors:
- 1 April 2007
- journal article
- Published by Trans Tech Publications, Ltd. in Key Engineering Materials
- Vol. 336-338, 1426-1428
Abstract
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.Keywords
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