Kumar, P and Burhanuddin, . and Kumar, A and Ghosh, A and Sinhamahapatra, S and Tripathi, Himansu Shekhar (2015) Effect of titania on the microstructure evolution of sintered magnesite in correlation with its properties. Ceramics International, 41 (7). pp. 9003-9008. ISSN 0272-8842

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Natural Indian magnesite contains large amount of impurities like CaO, SiO2 and Fe2O3. On heat treatment, these impurities chemically react and form low melting phases like monticellite (CMS), merwinite (C3MS2) and vitreous phases, which degrade the refractory properties of magnesite like hot modulus of rupture, corrosion resistance etc. In the present investigation, TiO2 was used to reduce the formation of low melting phases. Compacted green pellets and bars of magnesite containing 0-5 wt% TiO2 were sintered in the temperature range of 1500 1600 degrees C with 2 h soaking at peak temperature. It was observed that TiO2 slightly increased the apparent porosity and decreased the bulk density by reducing the formation of low melting phases. High temperature flexural strength increases with TiO2 content upto 3 wt% followed by slight decrease in strength after further increase in the amount of additive. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Item Type: Article
Subjects: Refractories
Divisions: Refractory
Depositing User: Bidhan Chaudhuri
Date Deposited: 30 Dec 2015 12:16
Last Modified: 30 Dec 2015 12:16
URI: http://cgcri.csircentral.net/id/eprint/3016

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