Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Preparation of Porous Mullite-Corundum Ceramics Via Organic Foam Impregnation

  • Zhou, Xianzhi (School of Materials Science and Chemical Engineering, Anhui Jianzhu University) ;
  • Zhu, Shaofeng (School of Materials Science and Chemical Engineering, Anhui Jianzhu University) ;
  • Wang, Yuxi (School of Materials Science and Chemical Engineering, Anhui Jianzhu University) ;
  • Zhang, Tong (School of Materials Science and Chemical Engineering, Anhui Jianzhu University)
  • Received : 2021.11.02
  • Accepted : 2022.01.26
  • Published : 2022.02.27
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Abstract

Porous mullite-corundum ceramics were prepared using organic foam impregnation method with alumina and silica as raw materials. The influence of alkaline treatment and surfactant modification on polyurethane foam were studied. Effects of sintering process and material composition on porous mullite-corundum ceramics were investigated. The results show that the hang-pulp quantity of polyurethane foam increases with alkaline treatment. After treatment with 3 wt% SDS solution, the hang-pulp quantity of polyurethane foam further improved. Open porosity of sample decreased with elevation of sintering temperature and holding time, and compressive strength of sample showed a trend opposite to the change of porosity. The open porosity of the sample was enhanced by the increase of m(Al2O3/SiO2); the compressive strength decreased with increase of m(Al2O3/SiO2). However, when m(Al2O3/SiO2) was 2.5, the compressive strength of the sample reached 6.23 MPa, and the open porosity of the sample was 80.7 %.

Keywords

Acknowledgement

This work was supported by the Loudi Haitian Special Ceramics Co., LTD (HYB20190049).

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