Si3N4-BN-SiO2 Based Microwave-Transparent Materials
The Si-B-O-N microwave-transparent materials were prepared by gas pressure sintering (GPS).The effect of BN and nano-SiO2 contents on the mechanical and dielectric properties of the composites was studied. The microstructural characteristic and reinforced mechanism of the composites were also investigated. The results showed that a series of Si-B-O-N wave-transparent materials could be obtained by controlling the contents of raw materials and technological parameter. The bending strength of composites is from 74.7MPa to 174.83MPa, the dielectric constant is from 3.5 to 4.2 and the tangent of loss angle is from 0.5×10-3 to 4.5×10-3.
Wei Pan and Jianghong Gong
W. R. Zhang et al., "Si3N4-BN-SiO2 Based Microwave-Transparent Materials", Key Engineering Materials, Vols. 368-372, pp. 913-916, 2008