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Sintering and dilatometric studies of combustion derived cordierite

Chandran, Gopi R and Ganguli, C and Patil, KC (1993) Sintering and dilatometric studies of combustion derived cordierite. In: Natural Symposium on Thermal Analysis, 1993, pp. 307-310.

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Two grades of cordierite powders have been prepared by the combustion of magnesium nitrate/magnesia, aluminum nitrate, silica fume, ammonium nitrate and urea at $525^o$C and their sintering characteristics have been studied using a high temp. dilatometer cordierite prepared using magnesium nitrate showed a shrinkage of 15% at $900^o$C while it was only 3% for cordierite derived from magnesia up to $1365^o$C. Magnesia-derived cordierite achieved appropriate 97% theoretical d. at $1450^o$C while cordierite prepared using magnesium nitrate was only 99% dense. The higher d. of magnesia cordierite has been explained on the basis of melting of low temperature eutectic under whose influence a sharp shrinkage (10%) was seen beyond $1365^o$C, the eutectic temperature. The total shrinkage of magnesia- and magnesium nitrate-derived cordierite was 10% and 21% respectively at $1425^o$C.

Item Type: Conference Paper
Publisher: Indian Thermal Analysis Society
Additional Information: Copyright of this article belongs to Indian Thermal Analysis Society.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 27 Jun 2008
Last Modified: 27 Aug 2008 13:30
URI: http://eprints.iisc.ac.in/id/eprint/14569

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