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.
Original language | English |
---|---|
Pages (from-to) | 1426-1428 |
Number of pages | 3 |
Journal | Key Engineering Materials |
Volume | 336-338 II |
Publication status | Published - 2007 |
Keywords
- BN-SiO
- Dielectric properties
- Mechanical properties