Journal of the Ceramic Society of Japan
Online ISSN : 1348-6535
Print ISSN : 1882-0743
ISSN-L : 1348-6535
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Effect of Si3N4 nanowires on the mechanical properties and dielectric constant of porous Si3N4 ceramics
Tianxiang ZHANGXinghong ZHANGWenbo HAN
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2019 Volume 127 Issue 9 Pages 602-605


The high strength and low dielectric constant of silicon nitride (Si3N4) ceramics are an irreconcilable conflict. It is a compromise to introduce a suitable reinforcing phase in Si3N4 ceramics to receive well dielectric properties without excessive loss of mechanical properties. In this paper, Si3N4 nanowires were in-situ synthesized by pyrolysis of polysilazane with Si3N4 nanopowders as catalyst without introduction of impurities in Si3N4 porous ceramics. The formed Si3N4 nanowires not only improve the mechanical property but also reduce dielectric constant of porous Si3N4 ceramic.

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