溶胶-凝胶法制备的Al_2O_3-ZrO_2陶瓷薄膜早期干燥过程的研究  

STUDY ON THE INITIAL DRYING PROCESS OF Al_2O_3-ZrO_2 CERAMIC FILM PREPARED BY SOL-GEL METHOD

作　　者：张勤俭[1] 张建华[1] 李敏[2] 张勤河[1] 毕进子[1] 

机构地区：[1]山东大学机械工程学院,济南250061 [2]国家电力公司电力建设研究所,北京100055

出　　处：《硅酸盐学报》2002年第1期128-130,共3页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金资助项目 ( 5 0 0 75 0 48)

摘　　要：采用无机盐先驱体 ,溶胶 -凝胶法制备了Al2 O3-ZrO2 双组分溶胶 ,对溶胶膜的早期干燥过程进行了研究 .利用扫描电子显微镜观察了不同干燥制度下薄膜的典型形貌 .结果表明 :Al2 O3-ZrO2 陶瓷薄膜的早期干燥过程存在着两个恒速干燥期 ,第 1恒速干燥期的干燥速度明显高于第 2恒速干燥期 .在早期干燥过程中温度的作用非常明显 ,随着温度的升高 ,薄膜质量损失率急剧增加 .分级干燥制度可以获得光滑平整。The Al 2O 3-ZrO 2 sols were prepared using zirconyl nitrate[ZrO(NO 3) 2·2H 2O], aluminium nitrate, yttrium nitrate [Y(NO 3) 3·6H 2O] and hexamethylene tetramine[(CH 2) 6N 4] as starting materials. The Al 2O 3-ZrO 2 films were prepared using the culture dish as the substrate and the rules of mass loss at different temperatures were studied by electrooptical analytical balance. The typical micrographs of the films dried on different conditions were observed by SEM. The results show that there are two drying periods with constant speeds during the drying process. The drying speed of the first period is bigger than the second one. With the temperature raised, mass loss rate of the film increases. The white matter separated out appears on the films dried at room temperature. There are many cracks on the films dried at 50 ℃ and 80 ℃. The smooth and crack free films can only be obtained by step_drying.

关 键 词：溶胶-凝胶法 氧化铝-氧化铝陶瓷薄膜 早期干燥过程 制备 

分 类 号：TQ174.758[化学工程—陶瓷工业]