• 作者： Huang, Chun-Chiang; Wu, Chi-Sheng
• 中文摘要： 多孔型陶瓷膜和有機高分子膜比較,具有較佳的耐高溫和耐酸鹼性質。氧化鋯是常使用的陶瓷膜材料之一。本氧化鋯膜是以溶凝膠法從鋯醇氧化物製備。在水解時,所需的水是由乙醇和乙酸酯化反應時均勻地釋出供應。因此得以控制水解的速率以避免氧化鋯聚集成大顆粒沈澱。此種技巧亦可應用在大型的批式溶凝膠程序。在加酸膠體化後,膠體液中氧化鋯的平均粒徑由雷射光散射量得約0.02.mu.m。氧化鋯以旋轉塗佈法塗佈在商用anodic disk表面,隨後在精確控制的溫度和溼度下乾燥,最後鍛燒以除去有機物。TGA/DTA的研究顯出在535.degree.C下鍛燒足以完全除去有機物。以掃描式電子顯微鏡觀察薄膜的孔洞結構,顯示氧化鋯薄膜均勻地塗佈在表面,粒直徑在0.03-0.05.mu.m之間。由掠角(入射角.ltoreq.2.degree.)X光干涉量得膜厚約 0.4.mu.m。在掠角XRD圖譜顯出大部分氧化鋯為非晶態,只有少許的正方晶形存在。從汞壓入法和膜的幾何形狀,求得戴體和膜空隙度分別約為40%和31%。有效孔直徑是以氮氣滲透法計算求得,大約0.04.mu.m。
• 英文摘要： Porous ceramic membranes have much better thermal and pH resistance than those of organic polymeric membranes. Zirconia is one of widely used ceramic membranes. The membranes were prepared from zirconium alkoxide by sol-gel method. The hydrolyzing water was homogeneously released by the esterification of ethanol and acetic acid in ethanol solution. Thus the rate of hydrolysis-condensation could be controlled to prevent the agglomeration of hydrated zirconia. This technique could also apply to large sol-gel processes. After acid peptization, the mean particle size of ZrO/sub 2/ colloid was near 0.02.mu.m measured by laser scattering method. The zirconia was spin-coated on a commercial anodic disk, and dried under the controlled humidity, then calcined to remove organic compounds. TGA/DTA study showed that organic compounds could be completely removed at .sim.535.degree.C. The morphology of membrane was examined by SEM showed that zirconia was uniformly coated on support. The particle diameter was found 0.03-0.05.mu.m observed in SEM micrographs. Membrane thickness was.sim.0.4.mu.m estimated from grazing-angle (incident angle.ltoreq.2.degree.) X-ray interference. The majority of ZrO/sub 2/ phase was amorphous, only a few cubic form was revealed from the grazing-angle XRD pattern. From the Hg intrusion and membrane geometry, the porosities of support and ZrO/sub 2/ membrane were founded 40% and .sim.31%, respectively. Nitrogen permeation was used to determine the mean diameter of effective (continue-network) pores of membrane. The effective pore diameter were estimated.sim.0.04.mu.m.
• 中文關鍵字： 多孔性; 鋯; 薄膜; 溶膠凝膠; 均相; 水解
• 英文關鍵字： Porous; Zirconia; Membrane; Sol-Gel; Homogeneous; Hydrolysis