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Thermoanalytical and X‐ray Studies of Rapidly Solidified K 2 CO 3
Author(s) -
Vassilev G. P.
Publication year - 1996
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170310520
Subject(s) - anhydrous , desorption , sorption , analytical chemistry (journal) , infrared spectroscopy , potassium , chemistry , potassium carbonate , materials science , adsorption , chromatography , organic chemistry
Molten K 2 CO 3 was rapidly solidified, and investigatcd using DSC, X‐ray analysis and infrared spectra. All thermoanalytical investigations have been carried out in the temperature interval from 20 to 450 °C. The sorption of water by the anhydrous potassium carbonate is the reason for appearance of K 2 CO 3 · 1.5 H 2 O in the specimens. The desorption processes occur in two stages usually. The enthalpics of desorption were estimated to be about 23000 J/mol. The polymorphic phase transitions of K 2 CO 3 were studied and compared with literature data.