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The System CaO‐Al 2 O 3 ‐H 2 O
Author(s) -
MAJUMDAR A. J.,
ROY RUSTUM
Publication year - 1956
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1956.tb15618.x
Subject(s) - atmospheric temperature range , decomposition , mineralogy , phase (matter) , chemistry , analytical chemistry (journal) , materials science , thermodynamics , physics , organic chemistry , chromatography
Phase equilibria have been determined in the system CaO‐Al 2 O 3 ‐H 2 O in the temperature range 100° to 1000°C. under water pressures of up to 3000 atmospheres. Only three hydrated phases are formed stably in the system: Ca(OH) 2 , 3CaO·Al 2 O 3 ·6H 2 O, and 4CaO·3Al 2 O 3 ‐3H 2 O. Pressure‐temperature curves delineating the equilibrium decomposition of each of these phases have been determined, and some ther‐mochemical data have been deduced therefrom. It has been established that both the compounds CaO·Al 2 O 3 and 3CaO·Al 2 O 3 have a minimum temperature of stability which is above 1000°C. The relevance of the new data to some aspects of cement chemistry is discussed.