Structural evolution of alumina membrane prepared on an alumina support using a sol-gel method

Hun Cheong, Woo Seok Cho, Jung Soo Ha, Chang Sam Kim, Duck-Kyun Choi, Deock Soo Cheong

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We prepared supported and unsupported alumina membranes using a sol-gel method. The supported membrane system consisted of an alumina support, two intermediate α-Al2O3 layers, and a top alumina membrane. The θ- to α-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°C higher θ- to α-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.

Original languageEnglish
Pages (from-to)304-309
Number of pages6
JournalJournal of Alloys and Compounds
Volume290
Issue number1-2
DOIs
StatePublished - 1999 Jan 1

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Aluminum Oxide
Sol-gel process
Alumina
Membranes
X ray diffraction
Diffraction patterns
Temperature
Microstructure
Scanning electron microscopy

Keywords

  • Alumina membrane
  • Sol-gel method
  • Structural evolution

Cite this

Cheong, Hun ; Cho, Woo Seok ; Ha, Jung Soo ; Kim, Chang Sam ; Choi, Duck-Kyun ; Cheong, Deock Soo. / Structural evolution of alumina membrane prepared on an alumina support using a sol-gel method. In: Journal of Alloys and Compounds. 1999 ; Vol. 290, No. 1-2. pp. 304-309.
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Structural evolution of alumina membrane prepared on an alumina support using a sol-gel method. / Cheong, Hun; Cho, Woo Seok; Ha, Jung Soo; Kim, Chang Sam; Choi, Duck-Kyun; Cheong, Deock Soo.

In: Journal of Alloys and Compounds, Vol. 290, No. 1-2, 01.01.1999, p. 304-309.

Research output: Contribution to journalArticle

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AU - Cheong, Hun

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AU - Cheong, Deock Soo

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AB - We prepared supported and unsupported alumina membranes using a sol-gel method. The supported membrane system consisted of an alumina support, two intermediate α-Al2O3 layers, and a top alumina membrane. The θ- to α-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°C higher θ- to α-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.

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