Preparation of Porous Mullite Ceramics Using Al as Foaming Agent

Jia Zhi Yin; Jia Chen Liu; An Ran Guo; Di Song; Wen Jun Wang

doi:10.4028/www.scientific.net/KEM.434-435.682

Paper Titles

Large Scale Translucent Y-α-Sialon Ceramics Prepared by Two-Steps Hot Pressing
p.668

Frequency Dependence of AC Conductivity in Iron Phosphate Glasses
p.671

Effects of the Starting Powders on Microstructure and Properties of Porous Silica Ceramics
p.674

Preparation and Grain Growth of Pb(Zr_0.95Ti_0.05)O₃ Porous Ceramics Prepared by One-Step Pyrolysis Process Using Non-Aqueous Pechini Method
p.678

Preparation of Porous Mullite Ceramics Using Al as Foaming Agent
p.682

Preparation and Properties of Porous Diamond Preforms
p.684

Effects of Infrared Scattering Powders on the Thermal Properties of Porous SiO₂ Insulation Material
p.689

Mechanical Behaviors of Foam Nickel Ceramic
p.693

Effect of Hexagonal BN on the Microstructure and Mechanical Properties of Pressureless Sintered Porous Si₃N₄ Ceramics
p.697

HomeKey Engineering MaterialsKey Engineering Materials Vols. 434-435Preparation of Porous Mullite Ceramics Using Al as...

Preparation of Porous Mullite Ceramics Using Al as Foaming Agent

Abstract:

Effects of Al in different added condition on pores shape and mullite configuration were investigated. Three sorts of hole were got by using Al as foaming agent in mullite composites. It was concluded that isolated holes could be formed by Al changing to Al2Ol3 with acidity condition in green state, open holes could be formed by Al changing to Al2O3 directly in sintering process, and mixed hole of isolated and open ones could be formed by Al changing to Al(OH)3 with alkalescence condition in green state followed changing to Al2O3 in sintering process. These holes could supply a position for growth of mullite as well.