DIELECTRIC PROPERTIES OF SiC(N)/LAS NANO-COMPOSITE

The nano SiC(N) powder was synthesized by laser-induced gas-phase reaction. SiC(N)/LAS nano-composite was prepared from LAS glass powder and as-formed nano SiC(N) powder by the hot-pressing method. The microwave dielectric properties of the nano-composite in a frequency range of 8.2~12.4 GHz were studied. The results show that the permittivity of the nano-composite is related closely to the contents of nano SiC(N) and influenced fairly by sintering temperatures. Compared with the mixture of nano SiC(N) and paraffin, the sintering process improved the nano-composite's dissipation to electromagnetic wave. This amelioration is ascribed to the formation of carbon interface between nano SiC(N) and LAS matrix.