Preparation and Properties of Porous Si3N4/SiO2/BN Composite Ceramics

Wei Dong; Chang An Wang; Lei Yu; Shi Xi Ouyang

doi:10.4028/www.scientific.net/KEM.512-515.828

Paper Titles

Microstructures and Mechanical Properties of SiC-TiB₂ Composite Prepared by Pressureless Sintering
p.812

Fabrication of High Strength α-SiAlON/BN Composition Ceramics by Hot Pressing
p.816

Porous Si₃N₄ Fabricated Using Benzoic Acid as Pore-Forming Agent
p.820

Preparation of Silicon Nitride Porous Ceramics
p.824

Preparation and Properties of Porous Si₃N₄/SiO₂/BN Composite Ceramics
p.828

Electric Conductive Si₃N₄/TiN Composite Ceramic Manufactured by Liquid-Qhase Sintering
p.832

Dispersion of Si₃N₄ Powders in Tert-Butyl Alcohol
p.837

Sintering Behavior and Properties of Si₃N₄ Ceramics with Yttrium Chloride Additive
p.841

Porous Nitride Ceramic Composites with Low-Dielectric Properties
p.849

HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Preparation and Properties of Porous Si3N4/SiO2/BN...

Preparation and Properties of Porous Si₃N₄/SiO₂/BN Composite Ceramics

Abstract:

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 78215 MPa. The dielectric constant of the porous Si3N4/SiO2/BN composite ceramics was 3.9~5 at 1 MHz.

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Periodical:

Key Engineering Materials (Volumes 512-515)

Pages:

828-831

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.512-515.828

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Online since:

June 2012

Authors:

Wei Dong, Chang An Wang, Lei Yu, Shi Xi Ouyang

Keywords:

Dielectric Property, Flexural Strength, Porous Ceramics, Si₃N₄/SiO₂/BN

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