ZrO_2陶瓷膜结构研究

Study on Structure of Zirconia Ceramic Membrane

以氧氯化锆为起始原料，通过溶胶－凝胶技术制备了无支撑体ＺｒＯ２陶瓷膜，用ＤＴＡ－ＴＧ、ＸＲＤ、ＢＥＴ、ＳＥＭ等分析测试手段对陶瓷膜结构及其孔性能进行了表征．结果表明，ＺｒＯ２陶瓷膜具有高度的择优取向特征，膜烧结过程存在着ＺｒＯ２品相转变，ＺｒＯ２陶瓷膜孔径＜５０ｎｍ，且呈双值分布，本文亦基于实验分析对陶瓷膜的结构模型进行了初步探讨．

Non-supported zirconia ceramic membranes derived by a sol-gel process, using zirconyl chloride as starting material, were characterized by DTA-TG, XTD, BET, and SEM. The results revealed that the membranes were highly oriented. The tetragonal zirconia was precipitated at low temperature (around 430℃), and thed transformed into the monoclinic phase which was thermodynamically stable at high temperature. The pores with a diameter of less than 50nm took on the doublc value distribution. The structure model of ceramic membranes was corroborated upon the basis of the experimental analysis.