Thermography of Gypsum
- 1 May 1954
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 37 (5) , 221-224
- https://doi.org/10.1111/j.1151-2916.1954.tb14027.x
Abstract
A study of gypsum was made using the differential thermal analysis technique. Gypsum and mixtures of gypsum with silica, alumina, iron oxide, dialyzed kaolin, or carbon were analyzed. Furnace atmospheres of air, nitrogen, carbon dioxide, and carbon monoxide were used. Gases evolved at the decomposition temperature of gypsum were analyzed chemically and sample residues were anelyzed by X‐ray diffraction A slight amount of decomposition was observed when gypsum passed from the beta to alpha mineral form of CaSO4, but decomposition was not complete even after fusion had started. The addition of 20% carbon to the gypsum and heating in a nitrogen atmosphere caused decomposition, with evolution of CO2 to start at a temperature as low as 615°C.This publication has 4 references indexed in Scilit:
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