Cheong, H Cho, WS Ha, JS Kim, CS Choi, DK Cheong, DS 2024-01-21T15:08:40Z 2024-01-21T15:08:40Z 2021-09-05 1999-08-30 0925-8388 https://pubs.kist.re.kr/handle/201004/141987 We prepared supported and unsupported alumina membranes using a sol-gel method. The supported membrane system consisted of an alumina support, two intermediate alpha-Al2O3 layers, and a top alumina membrane. The theta- to alpha-Al2O3 transformation in supported and unsupported alumina membranes was investigated using X-ray diffraction (XRD) and scanning electron microscopy. XRD patterns showed that the supported membrane had a 100 degrees C higher theta- to alpha-Al2O3 transformation temperature than the unsupported one. A similar effect was observed for microstructures of the membranes. We explained their transformation-temperature difference with a stress generated in the supported top membrane using a theoretical approach. (C) 1999 Elsevier Science S.A. All rights reserved. English ELSEVIER SCIENCE SA BOEHMITE TITANIA LAYERS Structural evolution of alumina membrane prepared on an alumina support using a sol-gel method Article 10.1016/S0925-8388(99)00240-6 1 JOURNAL OF ALLOYS AND COMPOUNDS, v.290, no.1-2, pp.304 - 309 JOURNAL OF ALLOYS AND COMPOUNDS 290 1-2 304 309 scie scopus 000082380800050 2-s2.0-11544265725 Chemistry, Physical Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Chemistry Materials Science Metallurgy & Metallurgical Engineering Article BOEHMITE TITANIA LAYERS structural evolution alumina membrane sol-gel method