Fabrication and Properties of Porous Anorthite⁄Mullite Ceramics

Abstract:

Porous anorthite/mullite composite ceramics with different mullite content were fabricated by foam-gelcasting, using CaCO₃, SiO₂, α-Al₂O₃ as raw material for anorthite phase and mullite powder for mullite phase. Effects of mullite powder content on bulk density, porosity, compressive strength and thermal conductivity of the porous composite ceramics were researched. It has been shown that mullite powder content has great effect on microstructure and properties of the porous anorthite⁄mullite composite ceramics. The open porosity of the prepared porous anorthite⁄mullite composite ceramics is in the range of 58.7 %~77.5 %, the compressive strength is between 4.2 and 30.9 MPa, and the thermal conductivity is in the range of 0.18 ~1.47 W⁄(m·K).

• Periodical: Key Engineering Materials (Volumes 512-515)
• Pages: 590-595
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.512-515.590
• Online since: June 2012
• Authors: Ya Mei Lin, Cui Wei Li, Feng Kun Yang, Chang An Wang
• Keywords: Anorthite, Mullite, Porous Ceramics, Thermal Conductivity (TC)

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