Preparation and performance of fly ash-loess based ceramic membrane supports: Effect of calcium carbonate addition and sintering temperature

Zhi Tong; Miaoyu Li; Dachuan Lib; Kui Wu; Xiaoyu Yang

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자료유형: 학술저널

저자정보: Zhi Tong (Xi’an Polytechnic University) Miaoyu Li (Xi’an Polytechnic University) Dachuan Lib (Shaanxi Modern Architectural Design and Research Institute) Kui Wu (Shaanxi Modern Architectural Design and Research Institute) Xiaoyu Yang (Xi’an Polytechnic University)

저널정보: 한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제24권 제2호

발행연도: 2023.4

수록면: 308 - 320 (13page)

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Porous mullite ceramic membrane supports were prepared by fly ash as the main raw material, with addition of loess andbauxite in the ratio of silicon to aluminium in the mullite phase (3Al2O3-2SiO2), calcium carbonate as pore-forming agents andpolyvinyl alcohol as the binder. The effects of calcium carbonate addition (0, 5, 10, and 15 wt%) and sintering temperatureon the performance of prepared supports, including crystalline phase evolution, microstructure, porosity, flexural strength,and pure water flux, were investigated. The results shows that the increase in sintering temperature is beneficial to theformation of the mullite crystalline phase and improves flexural strength. When the sintering temperature reached 1200 °Cand the calcium carbonate content was 5%, the porosity of the support was 46.3% and the flexural strength was 77.7 MPa. Based on the experiments, central composite experiments and response surface analysis were carried out to optimise thepreparation conditions, and determine the optimum amount of calcium carbonate addition and sintering temperature. Theresults of the study are of reference value for the study of inorganic ceramic membrane support.

#Ceramic membranes support #Fly ash #Porous mullite #Sintering temperature #Calcium carbonate.

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