摘要
为研究烧结制度对黄土基陶瓷膜支撑体性能的影响因素,以洛川黄土为骨料,采用滚压成型法、固态粒子烧结法制备黄土基陶瓷膜支撑体。用自制纯水通量测定装置、三点弯曲、X-射线衍射(XRD)、扫描电镜(SEM)等对黄土基陶瓷支撑体的纯水通量、抗折强度、酸碱腐蚀率、晶相变化以及表面形貌等微观结构进行分析表征。研究表明,烧结温度低于900℃,无法提供足够的激活能,无新晶相生成;制备黄土基支撑体的最佳烧结制度:从室温～300℃以2℃/min升温,在300℃保温120 min;在300℃～800℃以2℃/min升温,在800℃保温120 min;800℃～1 130℃以1℃/min升温,在1 130℃保温180 min,最后随马弗炉自然冷却。此制度制备出的支撑体抗折强度为42.59 MPa,纯水通量为1 132.98 L/m^2·h·MPa,酸、碱腐蚀率分别为0.88%,0.71%。
In order to study the effect of sintering system on the performance of loess-based ceramic membrane support,the loess-based ceramic membrane support was prepared by rolling forming method and solid particle sintering method with Luochuan loess as aggregate. Pure water flux,flexural strength,acid-base corrosion rate,crystal phase of loess-based ceramic support by self-made pure water flux measuring device,three-point bending,X-ray diffraction (XRD) and scanning electron microscopy (SEM) Microstructures such as changes and surface topography were analyzed and characterized. Studies have show that the sintering temperature is lower than 900 ℃,which can not provide sufficient activation energy,so there is no new crystal phase formation;the best sintering system for preparing loess-based support: heat from room temperature to 300 ℃at 2 ℃/min,heat at 300 ℃120 min;heat at 2 ℃/min at 300 ℃~800 ℃,heat at 800 ℃ for 120 min;800 ℃~1 130 ℃ at 1 ℃/min,heat at 1 130 ℃ for 180 min,and then naturally cool with muffle furnace. The flexural strength of the support prepared by this system is 42.59/MPa,the pure water flux is 1 132.98 L/m 2·h·MPa,and the acid/alkaline corrosion rate is 0.88% and 0.71%.
作者
崔双科
闫笑
同帜
高婷婷
刘婷
王佳悦
周广瑞
CUI Shuangke;YAN Xiao;TONG Zhi;GAO Tingting;LIU Ting;WANG Jiayue;ZHOU Guangrui(Shaanxi Modern Architectural Design and Research Institute,Xi′an 710048,China;School of Environmental and Chemical Engineering,Xi′an Polytechnic University,Xi′an 710048,China)
出处
《西安工程大学学报》
CAS
2019年第1期44-50,共7页
Journal of Xi’an Polytechnic University
基金
陕西省科技厅重点研发计划专项基金(2017GY-128)
关键词
烧结制度
黄土基陶瓷膜
烧成温度
升温速率
sintering schedule
loess-based ceramic membrane
sintering temperature
heating rate
