CHENG Sijing ¹, DAI Ying ¹, PEI Xinmei ^{1, 2}
(1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, Hubei, China;2. Mei Yi Tao (Fujian) High-tech Construction Materials Co., Ltd, Zhangzhou 363700, Fujian, China)

Abstract: Foamed ceramic insulation board is a new type of heat insulation building material. In this paper, phasecomposition, microstructure and mechanical properties of foamed ceramics insulation board were studied, by introducingmullite particles (0.10–0.15 mm in diameter) with different contents. It was demonstrated that cordierite phase was formed inthe foamed ceramic insulation board due to the introduction of mullite. When the content of mullite is ≤4 wt.%, the level ofcordierite increased with increasing quantity of mullite. As the concentration of mullite addition is ≥6 wt.%, the content ofcordierite doesn’t increase and mullite phase appears. For an appropriate content of mullite, cordierite whisker and mulliteparticles coexist in the insulation board, thus having characteristics of lightweight, high strength and high porosity. The samplewith 8 wt.% mullite reached maximum flexural strength of 9.33 MPa, while the volume density was 0.80 g·cm−3 and theporosity was 77.86%.
Key words: mullite; foamed ceramics; light; high strength; cordierite