担载多孔Al_2O_3膜的制备

Preparation of Supported Poroux Alumina Membrane

研究了溶胶－凝胶法在多孔陶瓷载体上制备多孔Ａｌ２Ｏ３膜的工艺条件。发现在孔直径为１．１和１．６ｕｍ的多孔陶瓷载体上必须经过多次重复浸渍干燥－焙烧过程，才能制备出担载均匀的多孔Ａｌ２Ｏ３膜。对溶胶和多孔陶瓷载体进行适当的化学改性后，能够减少浸渍－干燥－焙烧过程重复的次数。对Ａｌ２Ｏ３膜的孔径大小和透气性能进行了表征。

The porous alumina menbranes supported on porous ceramic of pore size 1.1～1. 6um were prepared by the sol-gel method,following repeated impregnating-drying-calcin-ing procedures. The number of repeating cycles could be reduced when the sols were modi-fied by PVA and La (NO3)3.