Preparation and Characteristics of Porous Ceramics by a foaming Technology at Low Temperature

1st International Workshop on Materials Science and Mechanical Engineering

材料科学;机械制造

Zhang, H.Q.^1,2,3 ; Wang, S.P.^2 ; Wen, J.^1,2 ; Wu, N.^2 ; Xu, S.H.^2

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan

430070, China^1

School of Materials Science and Engineering, Wuhan University of Technology, Wuhan

430070, China^2

Zhongshan Advanced Engineering Technology Research Institute, Wuhan University of Technology, Zhongshan

528400, China^3

关键词: Aluminum powders;    Disposal routes;    Economic benefits;    Foaming technology;    Low sintering temperature;    Low temperatures;    Properties and microstructures;    Sintering performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/281/1/012033/pdf
DOI  :  10.1088/1757-899X/281/1/012033

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Recycling and converting coal gangue and red mud into porous ceramics with good performance is a feasible disposal route. In this present work, porous foam ceramics was prepared using coal gangue and red mud as main raw materials at low sintering temperature, The amount of coal gangue and red mud were up to 70 wt%. To regulate the forming and sintering performance of the product, quartz sands and clay material were added to the formula. The green body was formed by a foaming technology using aluminum powders as foaming agents at room temperature. After foamed, the specimens were dried at 60-80 °C, and then calcined at 1060°C. Effects of concentration of NaOH and amount of aluminum powders on the phase, mechanical properties and microstructure were investigated here. Such study is expected to provide a new utilization route of the coal gangue and red mud, and brings both intensive environmental and economic benefits.