Preparation of Closed Pore Foamed Ceramics Through Complex Foaming Method by Using Porcelain Tile Residues
YANG Zanzhong1,2, WANG Han1, WANG Yongzai3, LIU Min1, DING Qi1, LI Chengfeng1, YUE Hongzhi1,2, WEI Chuncheng1,2
1 School of Materials Science and Engineering, Shandong University of Technology, Zibo 255049; 2 Shandong Engineering Research Demonstration Center of Ceramic-matrix Composites, Zibo 255049; 3 Analysis and Testing Center, Shandong University of Technology, Zibo 255049
Abstract: The foamed ceramics was prepared by complex foaming process using porcelain tile residues as the raw material. The mass ratio of complex agents was determined by the orthogonal test, and the complex foaming mechanism and the firing system were investigated. It was shown that the temperature range of pore-forming was broadened when the complex agent foaming acted mutually, and that the homogeneous pore structure could be formed. Samples in investigation were prepared by adding complex foaming agents in accordance with the mass fraction (%) of carbon∶calcium carbonate∶iron(Ⅲ) oxide∶silicon carbide=1∶3∶1.5∶1, and being calcined at 1 160 ℃ for 100 min. The closed porosity of the foamed ceramics is 62.94%, and its pore diameters are 1.2—1.9 mm. The volume density, water absorption, and thermal conductivity of the resultant are 369 kg/m3, 0.44%, and 0.079 W/(m·K) respectively.
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2017, Vol. 31 
