Bae, DS Cheong, DS Han, KS Choi, SH 2024-01-21T17:34:05Z 2024-01-21T17:34:05Z 2022-01-11 1998-01 0272-8842 https://pubs.kist.re.kr/handle/201004/143299 A ceramic membrane consisting of an alpha-Al2O3 support and an Al2O3-TiO2 top layer, which is thermally stable up to 900 degrees C, was prepared by the sol-gel method. The supported Al2O3-TiO2 top layer was made by dip-coating the support in a mixed sol. The microstructure of the composite membranes was studied by SEM and TEM after calcination at 850-1000 degrees C. After sintering at 850 degrees C for Ih, the average particle diameter of the Al2O3-TiO2 top layer was about 15 nm. The supported Al2O3-TiO2 composite membranes exhibited much higher heat resistance than the TiO2 membranes. Although significant grain growth was observed for the TiO2 membrane after heating above 700 degrees C due to phase transformation, the Al2O3-TiO2 composite membrane retained a crack-free microstructure and narrow particle size distribution even after calcination up to 900 degrees C. (C) 1997 Elsevier Science Limited and Techna S.r.l. English ELSEVIER SCI LTD ALUMINA MEMBRANES ZIRCONIA MEMBRANES SOL STABILITY TITANIA Fabrication and microstructure of Al2O3-TiO2 composite membranes with ultrafine pores Article 10.1016/S0272-8842(96)00072-7 1 CERAMICS INTERNATIONAL, v.24, no.1, pp.25 - 30 CERAMICS INTERNATIONAL 24 1 25 30 scie scopus A1998YJ94900005 2-s2.0-0031675888 Materials Science, Ceramics Materials Science Article ALUMINA MEMBRANES ZIRCONIA MEMBRANES SOL STABILITY TITANIA composite membrane Al2O3-TiO2 sol-gel method thermal stability