Preparation and Properties of Porous Si3N4/SiO2/BN Composite Ceramics
2012 ◽
Vol 512-515
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pp. 828-831
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Keyword(s):
Porous Si3N4/SiO2/BN composite ceramics with high strength and low dielectric constant were prepared by dry-pressing process and pressureless sintering at 1750°C for 1.5 h in flow nitrogen. The influences of BN content on microstructure, porosity, mechanical and dielectric properties of the porous Si3N4/SiO2/BN composite ceramics were discussed. The results showed that the porous Si3N4/SiO2/BN composite ceramics with porosity ranging from 29% to 48% were fabricated by adjusting the content of BN. The flexural strength of the porous Si3N4/SiO2/BN composite ceramics was 78215 MPa. The dielectric constant of the porous Si3N4/SiO2/BN composite ceramics was 3.9~5 at 1 MHz.
2018 ◽
Vol 2018
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pp. 000476-000482
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2012 ◽
Vol 512-515
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pp. 1180-1183
2007 ◽
Vol 61
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pp. 2277-2280
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2008 ◽
Vol 368-372
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pp. 412-413
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pp. 4235-4240
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Vol 54
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pp. 2235-2238
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