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Synthesis, properties, sintering and microstructure of sphene, $CaTiSiO_5$: A comparative study of coprecipitation, sol-gel and combustion processes

Muthuraman, M and Patil, KC (1998) Synthesis, properties, sintering and microstructure of sphene, $CaTiSiO_5$: A comparative study of coprecipitation, sol-gel and combustion processes. In: Materials Research Bulletin, 33 (4). pp. 655-661.

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Abstract

Sphene $(CaTiSiO_5)$, a titanosilicate ceramic considered as a host material for the immobilization of radioactive waste from nuclear power reactors, has been prepared using coprecipitation, sol-gel, and solution combustion methods. All these processes initially yielded amorphous powders, which on further calcination, crystallized to yield sphene along with perovskite, titania, and cristobalite. The coprecipitation-derived powder calcined at 1000°C for 2 h showed the formation of single phase sphene; whereas, the sol-gel-derived and combustion-derived powders required higher temperature (1200°C for 2 h) for single phase sphene to form. Coprecipitation-derived sphene powder achieved 96% theoretical density when sintered at 1300°C for 2 h, and the microstructure of the sintered body showed a uniform grain size of $\approx 1 \mu m$.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier.
Keywords: Oxide;Chemical synthesis;Microstructure
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 09 Jan 2007
Last Modified: 19 Sep 2010 04:34
URI: http://eprints.iisc.ernet.in/id/eprint/9385

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