Single- and two-step calorimetric studies of crystallization kinetics in simple ionic glass-forming liquids. 1. Ca(NO sub 3 ) sub 2 -KNO sub 3 system

Isothermal calorimetric studies of crystal nucleation and growth processes in the aqueous LiCl-H{sub 2}O it is demonstrated that the results obtained by using emulsion samples, which protect against heterogeneous nucleation artifacts, can be reproduced by using bulk samples. For the Ca(NO{sub 3}){su...

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Bibliographic Details
Published in:Journal of physical chemistry (1952) 1991-09, Vol.95:18
Main Authors: Senapati, H., Kadiyala, R.K., Angell, C.A.
Format: Article
Language:English
Subjects:
360602 - Other Materials- Structure & Phase Studies
400201 - Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CALCIUM COMPOUNDS
CALCIUM NITRATES
CALORIMETRY
CHLORIDES
CHLORINE COMPOUNDS
COLLOIDS
COMPARATIVE EVALUATIONS
CRYSTALLIZATION
DIAGRAMS
DISPERSIONS
EMULSIONS
EVALUATION
GLASS
HALIDES
HALOGEN COMPOUNDS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
KINETICS
LITHIUM CHLORIDES
LITHIUM COMPOUNDS
LITHIUM HALIDES
MATERIALS SCIENCE
MIXTURES
MOLTEN SALTS
NITRATES
NITROGEN COMPOUNDS
NUCLEATION
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE STUDIES
PHASE TRANSFORMATIONS
POTASSIUM COMPOUNDS
POTASSIUM NITRATES
SALTS
SOLUTIONS
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
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Summary:Isothermal calorimetric studies of crystal nucleation and growth processes in the aqueous LiCl-H{sub 2}O it is demonstrated that the results obtained by using emulsion samples, which protect against heterogeneous nucleation artifacts, can be reproduced by using bulk samples. For the Ca(NO{sub 3}){sub 2}-KNO{sub 3} system some interference from heterogeneous nucleation is observed, but results of character rather similar to those in LiCl-H{sub 2}O are obtained. These are refined by the use of two different two-step observation schedules which probe the relation between nucleation-dominated and growth-dominated regimes. The results make it possible to compare the crystallization kinetics in aqueous solutions and ionic melts and contrast them with molten fluoride systems of previous studies.
ISSN:0022-3654
1541-5740
DOI:10.1021/j100171a060