Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 69: Issue 3
Morphological and structural change of nano-pored alumina membrane above 1200 K
Authors:
R. Ozao North Shore College of SONY Institute Dept. of Electronics and Informatics Atsugi, Kanagawa 243-8501 Japan Atsugi, Kanagawa 243-8501 Japan

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H. Yoshida Geomatec Co., Ltd 3-13-7, Yaguchi Ota-ku, Tokyo 146-0093 Japan 3-13-7, Yaguchi Ota-ku, Tokyo 146-0093 Japan

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T. Inada Japan Fine Ceramics Center Atsuta, Nagoya, Aichi 456-8587 Japan Atsuta, Nagoya, Aichi 456-8587 Japan

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Pages:
925–931
Online Publication Date:
02 Nov 2004
Publication Date:
01 Jul 2002
Article Category:
Research Article
DOI:
https://doi.org/10.1023/a:1020624526552
Keywords:
TMA; alumina polymorphs; mesoporous membrane; anodic alumina; nanopores
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Abstract  

The transition and the change in pore morphology of a porous alumina membrane prepared by anodically oxidizing aluminum in sulfuric acid were studied mainly by TG-DTA, TMA, dilatometry and TEM. At ca. 1243 K, TMA showed an expansion followed by contraction; the CO2 and SO2 gases were quickly discharged, and the pore morphology of the as-prepared porous membrane (ca 150 mm-t, with pores ca 25 nm in diameter and containing ca 11% by mass of SO2) showed an abrupt change, but the pores were retained to ca. 1573 K. Sulfur incorporated in the membrane was lost in two stages, i.e., at ca 1243 K and in a range up to 1373 K. Isothermal measurements revealed the complex crystallization of the amorphous phase into polycrystalline phase.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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