Li Bo ¹, Guo Lei ², Tong Zhi ³, GuoYani ⁴, Huang Kaipei ⁵, Xue Liudi ⁶, Liu Lu ⁷
( 1. School of Urban Planning and Municipal Engineering, Xi'an Polytechnic University, Xi’an 710048, Shaanxi, China; 2. School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi’an 710048, Shaanxi, China)

Abstract:  In this study, rolling molding and solid particle sintering methods were used to prepare tubular porous ceramic supports with the aggregate of fly ash (d₅₀=21.28 μm) and loess (d₅₀=11.96 μm). The effect of sintering temperature and holding time on properties of the ceramic support were studied. Thermal stability, flexural strength, crystal phase composition and microscopic morphology of the fly ash and loess ceramic supports were characterized by using thermogravimetric analysis (TG-DTG), three-point bending method, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The optimal properties were obtained at sintering temperature of 1100 ℃ for 2.5 h. Pure water flux of the support was 2846.89 L/m²·h·MPa, the flexural strength was 17.15 MPa, the linear shrinkage rate was 4.48%, acid/alkali corrosion weight loss rates were only 2.74% and 0.06%, and the average pore size was 4.11 μm. The particles are evenly distributed and have mature crystals
Key words:  sintering temperature; holding time; flyash; ceramic membrane support