ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7

Published monthly
 

Enthalpy of incongruent decomposition of ЗСаО • Al203

K. Adamkovičová, L. Kosa, Š. Povraz, and I. Proks

Institute of Inorganic Chemistry, Centre for Chemical Research, Slovak Academy of Sciences, CS-842 36 Bratislava

 

Abstract: Using a precursor method tricalcium aluminate (C3A) and peritectic melt formed at the incongruent decomposition of this compound at 1808 К were prepared. The peritectic melt consisted of 59.15 mass % CaO + 40.85 mass % Al203 . Calcium oxide used in the study was prepared by thermal decomposi­ tion of СаСОз. Temperature dependence of the specific relative enthalpy of the peritectic melt was determined combining the measurements of a"drop calorimetry" with the data obtained using a calorimeter for determination of heat of dissolution. Temperature dependences of the specific relative enthalpy of C3A and CaO were determined on the basis of literature data and measurements of their heats of dissolution. Values of the specific relative enthalpies of C3A, CaO, and peritectic melt at the temperature of 1808 К were used together with the material balance of the decomposition of C3A for determination of the specific enthalpy of the incongruent decomposition of C3A Δhin . die (C3A; 1808 K) = (306 ± 31) kJ kg-1 Until now value of this quantity has not been calorimetrically determined.

Full paper in Portable Document Format: 391a3.pdf

 

Chemical Papers 39 (1) 3–13 (1985)

Tuesday, March 19, 2024

IMPACT FACTOR 2021
2.146
SCImago Journal Rank 2021
0.365
SEARCH
Advanced
VOLUMES
European Symposium on Analytical Spectrometry ESAS 2022
© 2024 Chemical Papers