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Morphological and phase composition changes during sintering of ultralight Al2O3TiO2 foams

Published online by Cambridge University Press:  31 January 2011

M. Mann ,
G. E. Shter  and
G. S. Grader
M. Mann
Affiliation:
Chemical Engineering Dept., Technion, Haifa 32000, Israel
G. E. Shter
Affiliation:
Chemical Engineering Dept., Technion, Haifa 32000, Israel
G. S. Grader
Affiliation:
Chemical Engineering Dept., Technion, Haifa 32000, Israel
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Abstract

The morphological and phase composition changes during sintering of ultralight pure Al2O3 and Al2O3/TiO2 foams were investigated in the temperature range of 900–1600 °C in air. The titania (10 wt%) was incorporated during a nonhydrolytic foaming procedure to facilitate its uniform dispersion in the alumina matrix. The changes of linear shrinkage and related changes in effective density and porosity demonstrate a higher reactivity in the Al2O3/TiO2 foam. The formation of tialite phase in the Al2O3/TiO2 foams occurred below 1300 °C and remained stable during cooling under 1200 °C without stabilizers.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 4 , April 2002 , pp. 831 - 837
Copyright
Copyright © Materials Research Society 2002

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