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Fabrication of ultra-high-porosity cordierite foams by the thermo-foaming of powder dispersions in molten D-glucose anhydrous

Published online by Cambridge University Press:  23 May 2019

Xin Li ,
Yuanbing Li ,
Ruofei Xiang ,
Shujing Li ,
Qirun Zhou  and
Han Luo
Xin Li
Affiliation:
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
Yuanbing Li*
Affiliation:
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China; and National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
Ruofei Xiang
Affiliation:
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
Shujing Li
Affiliation:
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China; and National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
Qirun Zhou
Affiliation:
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
Han Luo
Affiliation:
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Cordierite foams were prepared by thermo-foaming of alumina–microsilica–talc powder dispersions in molten D-glucose anhydrous followed by reaction sintering at 1400 °C, which exhibited an interconnected cellular morphology and three-dimensional porous cell walls. The cordierite foam had a porosity of up to 96%, and its corresponding thermal conductivity was as low as 0.057 W/(m·K). The foam structures showed a great promise for gas filtration and gas catalytic support. The formation of interconnected cellular morphology, the variations of cell wall thickness, and cell size were explained from the perspective of viscosity and weak points in this paper. The linear shrinkage of cordierite foams having a density of 0.102–0.226 g/cm3 was in the range of 13.0–6.9%. And the compressive strength (0.05–0.28 MPa) was determined by the large cell size (1.1–1.3 mm), ultra-high porosity (91–96%), and characteristic of cordierite.

Keywords

microstructurefoamsporosity
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 10 , 28 May 2019 , pp. 1818 - 1825
Copyright
Copyright © Materials Research Society 2019 

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