有载体氧化钛膜的结构及热稳定性

Structure and Thermal Stability of Supported Titania Membranes

采用溶胶 -凝胶法制备有载体氧化钛膜 ,通过扫描电镜、差热热重仪、X射线能谱仪和X射线衍射仪等分析测试手段对膜的形貌、结构及热稳定性进行了研究。实验结果表明 :氧化钛膜膜厚约 7μm左右 ,膜由纳米粒子构成具有纳米孔径且与陶瓷基底结合紧密 ,成膜完整。该膜在 3 2 0℃以后稳定存在。膜为锐钛矿与金红石型二氧化钛混合晶体结构 ,四角晶系。

Supported titania ceramic membranes,prepared by sol-gel techniques from alkoxide starting materials,were characterized by SEM,DSC,TGA,EDS and XRD.It was found that the thickness of the membrane,which showed the mixed crystal of anatase and rutile and was stable above 320℃,was 7μm.Both the particles consisting of the membrane and pores of the membrane were nanometer scale.