Tricalcium Silicate and Its Stability Within the System CaO‐SiO2
- 1 January 1959
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 42 (1) , 11-15
- https://doi.org/10.1111/j.1151-2916.1959.tb09135.x
Abstract
A portion of the system CaO‐SiO2 has been reinvestigated by high‐temperature microscopy. Direct observations at the liquidus establish a primary‐phase region for tricalcium silicate, which is shown in a revised phase diagram to melt incongruently. The tricalcium silicate primary‐phase field extends from the eutectic with dicalcium silicate at 2050 °C., 69.5% CaO, to the incongruent boundary with lime at 2070°C., 71.5% CaO, with a possible error in composition of ± 0.25%. The estimated accuracy of these temperatures is ±3° relative to one another, and ± 10° relative to the melting points of alumina and dicalcium silicate, for which the values 2040°C. and 2130°C. taken from the literature have been assumed.Keywords
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