烧结制度对铝矾土/黄土基支撑体性能影响  

Effect of sintering system on properties of bauxite/loess foundation support

作　　者：同帜[1] 黄开佩 杨博文 孙小娟 张健需 TONG Zhi;HUANG Kai-pei;YANG Bo-wen;SUN Xiao-juan;ZHANG Jian-xu(School of Environmental and Chemical Engineering,Xi'an Polytechnic University,Xi'an 710048,Shaanxi Province,China)

机构地区：[1]西安工程大学环境与化学工程学院,陕西西安710048

出　　处：《化学工程》2020年第2期63-68,共6页Chemical Engineering(China)

基　　金：陕西省科学技术厅攻关项目(2018GY-178)。

摘　　要：试验以铝矾土和黄土为骨料,白云石为成孔剂,采用滚压成型法和固态粒子烧结法制备低成本无机陶瓷膜支撑体,并探究烧结制度对支撑体性能的影响。通过X-射线衍射(XRD)、扫描电镜(SEM)、压汞法、三点弯曲法、质量损失法、自制纯水渗透率测定装置等方法对支撑体的晶相变化、微观形貌、孔隙率、抗折强度、酸碱腐蚀率、纯水渗透率进行分析表征。结果表明:支撑体晶相组成主要为刚玉(Al2O3)、石英(SiO2)、莫来石(3Al2O3·2SiO2)和钙长石(CaO·Al2O3·6SiO2);烧结温度为1140℃,保温9 h制备出的支撑体综合性能最优,此时的支撑体纯水渗透率为4.02 m^3/(m^2·h·MPa),抗折强度为30.24 MPa,孔隙率为28.59%,耐酸、碱腐蚀率分别为97.73%和99%。The low-cost ceramic membrane supports with bauxite and loess as aggregate,dolomite as pore forming agent were prepared by extrusion-molding and solid particle sintering method.The effect of sintering system on the properties of ceramic membrane supports was mainly studied.The crystal phase,microscopic morphology,porosity,flexural strength,acid-base corrosion rate and pure water permeability of ceramic supports were characterized by testing methods such as X-ray diffraction(XRD),scanning electron microscopy(SEM),mercury intrusion method,three-point bending method,mass loss method,self-made pure water flux measurement device.The results indicate that the phase of supports is mainly composed of corundum(Al2O3),quartz(SiO2),mullite(3Al2O3·2SiO2)and anorthite(CaO·Al2O3·6SiO2);the excellent comprehensive performance tubular supports with pure water permeability of 4.02 m^3/(m·h·MPa),compressive strength of 30.24 MPa,porosity of 28.59%,and the acid and alkali corrosion resistance of 97.73%/99% can be fabricated under the conditions of sintering temperature 1140℃ and holding time 9 h.

关 键 词：烧结制度 无机陶瓷膜 支撑体 

分 类 号：TQ174.1[化学工程—陶瓷工业]