Fabrication and properties of porous anorthite ceramics with modelling pore structure

摘要

A single-phased anorthite porous ceramics was fabricated by foam-gelcasting technique using alpha-Al2O3, CaCO3 and SiO2 as starting material. Through adjusting foaming agent concentration and solid content in the slurry, tailored porosity (62-91%), pore size (7-350 mu m), thermal conductivity (0.04-0.27 W/m.K) and compressive strength (0.27-13.39 MPa) were obtained. The experimental thermal conductivity was in good agreement with the universal model. The dependence of compressive strength on porosity can be described by the Gibson model. (C) 2017 Elsevier B.V. All rights reserved.