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The Influence of Titania, Carbon Black and Graphite on the Spinel Formation in a Magnesia Alumina Castable

J. Angelkort, L. Himmel, Y. Lakotta-Weinhold, A. Reichert, M. Mix

Journal of Ceramic Science and Technology, Vol. 16, No. 3 (2025), pp. 135-140

DOI: 10.4416/JCST2024-00017

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Abstract

In this work, we studied the effect of small additions of titania and three carbon sources on the spinelization of magnesia alumina castables. Compared to additive-free reference samples, titania-containing magnesia alumina castables were found to exhibit improved sinterability and higher cold crushing strength after firing. In parallel, significantly higher amounts of spinel formed during heat treatment when titania had been added to the castable.For the carbon-containing samples, the grain size of the carbon source proved to be an important parameter controlling the influence on spinelization. While the addition of carbon black (particle size d90

Keywords

Spinel formation, castable, titania addition, carbon addition, sintering.

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