Low-Temperature Preparation of Porous Cordierite-Mullite Ceramics Using Rice Husk as Silica Source and Pore-Forming Agent

Abstract:

Si and C of rice rusk were used as silica source and pore-forming agent to prepare cordierite-mullite ceramics at 1380°C for 5 h soaking. The Nd2O3 additive was added to improve the sintering properties. The bending strength, porosity, and thermal expansion coefficient were measured. The composition was characterized by X-ray diffraction (XRD). The microstructures of the sintered samples were observed by scanning electron microscopy (SEM). The cordierite-mullite ceramic doped with 2% Nd2O3 have high prorosity and low thermal expansion coefficient, its bending strength reaches 20.55 MPa. The addition of Nd2O3 decreases the mullite formation temperature to 1200 °C

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 86-90
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.86
• Online since: November 2012
• Authors: Wei Guo, Hong Bin Lu, Chun Xia Feng, Jian Sun, Hai Feng Sun, Jie Zhou, Jia Jun Shen
• Keywords: Cordierite, Mullite, Nd₂O₃, Porous Ceramics, Rice Husk

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