烧结温度对单管式黄土陶瓷支撑体性能的影响

Effect of sintering temperature on properties of single-tube loess ceramic support

以中值粒径为38.78μm的洛川黄土为骨料,采用滚压成型法和固态粒子烧结法制备单管式黄土基陶瓷膜支撑体。探究烧结温度对黄土陶瓷支撑体性能的影响。通过热重分析、三点弯曲法、压汞法、自制装置、质量损失法、X-射线衍射、扫描电镜对单管式黄土基陶瓷膜支撑体的热稳定性、抗折强度、孔隙率、纯水通量、耐酸碱度、晶相组成的分析及表面形貌的观察对支撑体进行了表征。研究表明,烧结温度确实能影响黄土陶瓷支撑体的性能;当烧结温度为1100℃时,支撑体的表面光滑,孔隙率达到了20.08%、抗折强度为32.46 MPa、纯水渗透率为893 L/(m^2·h·MPa)、酸碱腐蚀重量损失率为0.42%与0.24%,平均孔径和中值孔径分别为4.68、2.68μm。在此烧结温度下可生产出成本合理、效果优良的陶瓷膜支撑体。

Single-tube Luochuan loess ceramic supports were prepared by the rolling molding method and solid particle sintering method using loess with the median diameter of 38.78μm as aggregate.The effect of sintering temperature on the properties of single-tube ceramic membrane supports was mainly studied.The thermal stability,flexural strength,pure water flux,acid/alkali resistance,analysis of crystal phase composition and observation of surface morphology of loess-based ceramic membrane supports were characterized by thermogravimetric analysis,three-point bending method,mercury intrusion method,self-made pure water permeability measurement device,mass loss method,X-ray diffraction,and scanning electron microscopy.It is found that the sintering temperature could indeed affect the performance of the loess ceramic support.When the sintering temperature was 1100℃,as-prepared support had a good performance with the porosity of 20.08%,the flexural strength of 32.46 MPa,the pure water permeability of 893 L/(m^2·h·MPa),the weight loss rate of acid/alkali corrosion of 0.42%and 0.24%,and the average pore diameter and the median pore diameter of 4.68μm and 2.68μm,respectively.Under the conditions of 1100℃as sintering temperature,the support exhibited the best performance with an optimum addition amount.