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Enthalpies of Chromium Oxide Solution in Soda Lime Borosilicate Glass Systems
Author(s) -
Kim CheonWoo,
Choi Kwansik,
Park JongKil,
Shin SangWoon,
Song MyungJae
Publication year - 2001
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.1151-2916.2001.tb01125.x
Subject(s) - borosilicate glass , solubility , enthalpy , endothermic process , enthalpy change of solution , chemistry , chromium , oxide , enthalpy of mixing , dissolution , mixing (physics) , inorganic chemistry , thermodynamics , materials science , adsorption , organic chemistry , physics , quantum mechanics
Chromium oxide (Cr 2 O 3 ) solubility was measured in soda lime borosilicate glass from 1400 to 1500 K. The temperature dependence of the solubility increased with increased sodium oxide concentration. The enthalpies of solution for the equilibrium phases were calculated from the solubility data in the temperature range from 1400 to 1500 K. The enthalpy of fusion for Cr 2 O 3 at 1450 K was calculated to be 108.0 kJ·mol −1 . This value was less than our measured values for enthalpy of solution, 111.0 ± 0.5 and 158.4 ± 0.3 kJ·mol −1 , indicating that all enthalpies of mixing were positive; that is, the mixing process was endothermic. This characterized the interaction between solute and solvent as repulsive.