SiO_2-ZrO_2复合膜的制备及其工艺参数的研究  

Preparation and processing parameters study of SiO_2-ZrO_2 composite membrane

作　　者：同帜[1] 胡敏盾 董旭娟[1] 邹力[1] 李海红[1] 

机构地区：[1]西安工程大学环境与化学工程学院,西安710048

出　　处：《膜科学与技术》2014年第6期35-38,45,共5页Membrane Science and Technology

基　　金：国家自然科学基金资助项目(21103132);陕西省教育厅基金资助项目(2013JC15)

摘　　要：采用溶胶-凝胶法制备SiO2-ZrO2复合薄膜,研究溶胶成分和烧结工艺对薄膜开裂及其性能的影响.采用乌氏黏度计、热重分析仪(TG-DTG)、X射线衍射分析仪(XRD)和原子力显微镜(AFM)对薄膜进行表征.结果显示,溶胶的组成、特定温度的升温速率对薄膜的开裂起决定性作用;当摩尔比为n(SiO2)∶n(ZrO2)=2.0∶0.5时,制得溶胶黏度适中、透明稳定,干燥的凝胶在0.5℃/min的升温速率下升至600℃焙烧2h,并在75、190和230℃附近缓慢升温且适当保温后,可得无裂缝且均匀、透明的SiO2-ZrO2复合薄膜,所制备的薄膜具有较大的比表面积和较窄的孔径分布.The SiO2-ZrO2 composite membrane was prepared by sol-gel method and this paper studied the effect of sol composition and sintering process on cracking and other properties of membrane and characterized it by using ubbelohde viscometer,thermal gravimetric analysis（TG-DTG）,X-ray diffraction analyzer（XRD）and atomic force microscopy（AFM）.The results showed that sol composition and heating rate of sintering process in a certain temperature of the membrane played a decisive role in cracking.Sol can be obtained with the properties of moderate viscosity,transparent and stable,when n（SiO2）∶n（ZrO2）=2∶0.5.The no cracking,uniform and transparent SiO2-ZrO2 composite membrane with a large surface area and narrow pore size distribution can be gotten when calcination temperature of dried gel was 600 ℃ at the speed of 0.5 ℃/min for 2h,meanwhile heated up slowly and insulated at75 ℃、190 ℃ and 230 ℃.

关 键 词：溶胶-凝胶 SiO2-ZrO2复合薄膜 防开裂 溶胶稳定性 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TQ174.7[化学工程—陶瓷工业]