Preparation of Silicon Nitride Porous Ceramics

Jian Liu; Kai Liu; Hong Sheng Wang; Fang Gao; Rong Liao

doi:10.4028/www.scientific.net/KEM.512-515.824

Paper Titles

Design on Thermal Protection Structure of C/SiC Lattice Composite Materials
p.808

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

HomeKey Engineering MaterialsKey Engineering Materials Vols. 512-515Preparation of Silicon Nitride Porous Ceramics

Preparation of Silicon Nitride Porous Ceramics

Abstract:

A silicon nitride porous ceramics having excellent mechanical strength and dielectric properties can be employed as a wave-transparent material. The silicon nitride porous ceramic contains a plurality of silicon nitride crystal grains with pores formed in grain boundary which forms a three-dimensional network structure. The properties of the silicon nitride porous ceramics was studied , the porous ceramics was prepared by different process parameters, including the pressure of cold isostatic pressing, temperature of sintering and sintering atmosphere, etc.; A high porosity(>50%), high strength(>120MPa), low dielectric properties(ε<3.2) silicon nitride ceramic can be prepared by appropriate process parameters.