烧结制度对粉煤灰-黄土基陶瓷膜支撑体的影响
作者:吕相玉,郭雅妮,同帜,杨小雨,李大川,龚亮,王焓
单位: 1. 西安工程大学 环境与化学工程学院,西安 710048; 2. 陕西科控技术产业研究院有限公司,西安 710077
关键词: 粉煤灰-黄土基陶瓷膜;支撑体;烧结温度;保温时间
分类号: X781.5
出版年,卷(期):页码: 2022,42(3):60-67

摘要:
 以粉煤灰和洛川黄土为骨料,纳米级TiO2为单相烧结助剂,羧甲基纤维素(CMC)为粘结剂,利用滚压成型法与固态粒子烧结法制得粉煤灰-黄土基陶瓷膜支撑体,探究并分析了烧结温度与保温时间对支撑体的影响。分别利用热重分析(TG-DTG)、压汞法、自制纯水通量测定设备、三点弯曲法、X-射线衍射(XRD)、质量损失法、扫描电镜(SEM)等方法对粉煤灰-黄土基陶瓷膜显气孔率、纯水通量、抗弯折强度、晶相变化、耐酸性碱性腐蚀度和表面形貌等结构表征。研究结果表明:在纳米级TiO2添加量5%、烧结温度为1100℃、保温时间为10h的条件下,制得的支撑体综合性能最佳,纯水通量为2382.56L/(m2·h·MPa)、抗弯折强度为13.27MPa、显气孔率为34.58%、耐酸/碱腐蚀度为1.62%/0.71%。
 Using fly ash and Luochuan loess as aggregates, nano-TiO2 as single-phase sintering additives, and carboxymethyl cellulose (CMC) as binder, fly ash-loess-based ceramic membrane support was prepared by rolling molding and solid particle sintering. The effects of sintering temperature and holding time on the support were explored and analyzed. The thermal gravimetric analysis (TG-DTG), mercury intrusion method, self-made pure water flux measurement equipment, three-point bending method, X-ray diffraction (XRD), mass loss method and scanning electron microscopy (SEM) were used to characterize the apparent porosity, pure water flux, flexural strength, crystal phase change, acid resistance and alkaline corrosion resistance of fly ash-loess-based ceramic membrane. The results show that the support has the best comprehensive performance under the conditions of 5 % nano-TiO2 addition, sintering temperature of 1100 °C and holding time of 10 h. The pure water flux is 2382.56 L/(m2·h·MPa), the bending strength is 13.27 MPa, the apparent porosity is 34.58 %, and the acid / alkali corrosion resistance is 1.62 % / 0.71 %.

基金项目:
陕西省科技厅重点研发计划—重点项目(2020ZDLNY06-09、2020SF-410、2020GY-325)

作者简介:
吕相玉(1996-),女,陕西西安人,硕士研究生,主要从事环保新材料的应用研究,

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