Experimental determination of the volume change of pure salts and salt mixtures at their melting point

1982 ◽  
Vol 3 (2) ◽  
pp. 137-155 ◽  
Author(s):  
J. P. Petitet ◽  
M. Fraiha ◽  
R. Tufeu ◽  
B. Le Neindre
Keyword(s):  
Melting Point ◽  
Experimental Determination ◽  
Volume Change ◽  
Salt Mixtures

Experimental determination of the thermal conductivity of molten pure salts and salt mixtures

1985 ◽  
Vol 6 (4) ◽  
pp. 315-330 ◽  
Author(s):  
R. Tufeu ◽  
J. P. Petitet ◽  
L. Denielou ◽  
B. Le Neindre
Keyword(s):  
Thermal Conductivity ◽  
Experimental Determination ◽  
Salt Mixtures

Methods of Increasing the Measurement Accuracy during the Experimental Determination of the Melting Point of Graphite

2004 ◽  
Vol 42 (1) ◽  
pp. 60-67 ◽  
Author(s):  
A. Yu. Basharin ◽  
M. V. Brykin ◽  
M. Yu. Marin ◽  
I. S. Pakhomov ◽  
S. F. Sitnikov
Keyword(s):  
Melting Point ◽  
Experimental Determination ◽  
Measurement Accuracy

Experimental Determination of the Melting Point and Heat Capacity for a Free Cluster of 139 Sodium Atoms

1997 ◽  
Vol 79 (1) ◽  
pp. 99-102 ◽  
Author(s):  
Martin Schmidt ◽  
Robert Kusche ◽  
Werner Kronmüller ◽  
Bernd von Issendorff ◽  
Hellmut Haberland
Keyword(s):  
Heat Capacity ◽  
Melting Point ◽  
Experimental Determination ◽  
Free Cluster ◽  
Sodium Atoms

scholarly journals MELT PROPERTIES OF THE FOUR SALT SYSTEM AlF3-KF-NaF-ZrF4

2020 ◽  
Vol 86 (7) ◽  
pp. 65-74
Author(s):  
Valery Buhaenko ◽  
Volodymyr Chupryna ◽  
Oleh Lysenko
Keyword(s):  
Melting Point ◽  
Solid Solutions ◽  
Chemical Interaction ◽  
Primary Crystallization ◽  
Complex Compounds ◽  
Quadruple System ◽  
Salt Mixtures ◽  
Fusibility Diagram ◽  
Triple Points

The fusibility of salt mixtures in the anhydrous quadruple AlF3-KF-NaF-ZrF4 system was studied. The direction of lowering the melting point of substances in the tetrahedron of the composition of the quadruple system, the influence of complexation on lowering the melting point of salt mixtures, were clarified. The fusibility of salts in the ternary AlF3-NaF-ZrF4 system was investigated experimentally by methods of thermal phase analysis. The diagram of fusibility to the isotherm of 900 °C is constructed. Primary crystallization fields are represented by the phases of the initial salts (AlF3, KF, ZrF4) of the compounds that were formed in binary subsystems (2KF∙ZrF4, 7NaF∙6ZrF4, 3NaF∙4ZrF4, 5NaF∙3AlF3) and Na3AlF6-Na3ZrF7 solid solutions. The minimum melting point was 466 ° C in a triple eutectic. The fusibility of salt mixtures was experimentally studied in the subsystem K2ZrF6-Na2ZrF6-KAlF4-NaAlF4, which was a section of the tetrahedron of the composition of the quadruple system AlF3-KF-NaF-ZrF4. The fusibility diagram of this subsystem was constructed. A triple point with a melting point of 450 °C was found. Primary crystallization fields are represented by compounds K2ZrF6, Na2ZrF6 and solid solutions KAlF4-NaAlF4. The low-melting region of the compositions in the tetrahedron of the composition of the quadruple system was shifted to the faces NaF-KF-ZrF4 and AlF3-KF-ZrF4. The intense chemical interaction of the starting materials of the quadruple system with the formation of complex compounds and the extensive formation of solid solutions complicated the determination of crystallizing solid phases and the establishment of monovariant equilibria in quadruple mixtures. Quadruple eutectic in the four component system was formed by the merger of four monovariant lines. To calculate the composition of the quadruple eutectic by the melting temperature and the composition of the eutectic of the triple subsystems, the coordinates of the four triple points are necessary. The characteristic of two triple points was obtained as a result of an experimental study of the fusibility diagrams of auxiliary sections of a tetrahedron of the composition: K2ZrF4-Na2ZrF6-KAlF4-NaAlF4 and KZrF6-NaAlF4-(0,5NaF+0,5ZrF4)-KAlF4, which were located near the quadruple eutectic.

The pressure dependence of the dehydration of gypsum to bassanite

1987 ◽  
Vol 51 (361) ◽  
pp. 453-457 ◽  
Author(s):  
J. D. C. McConnell ◽  
D. M. Astill ◽  
P. L. Hall
Keyword(s):  
Elevated Temperature ◽  
Experimental Determination ◽  
Volume Change ◽  
Pressure Dependence ◽  
Thermodynamic Data ◽  
Dehydration Reaction ◽  
Temperature And Pressure ◽  
The Stability ◽  
Very High

AbstractA new experimental determination of the stability relationships for the dehydration of gypsum to the hemihydrate mineral bassanite at elevated temperature and pressure is described. The experimental method used depends on the observation of very small changes in pressure on the onset of reaction due to the potential volume change in the reaction. The technique yields P-T data of very high precision for this dehydration reaction, and the method is likely to be of use for other reactions. The experimental P-T results have been compared with those calculated from existing thermodynamic data for this reaction.

Experimental Determination of Hydrostatic Compression versus Volume Change Curves for Cellular Solids

1989 ◽  
Vol 17 (1) ◽  
pp. 67 ◽  
Author(s):  
A Wolfenden ◽  
MA Fortes ◽  
JJ Fernandes ◽  
I Serralheiro ◽  
ME Rosa
Keyword(s):  
Experimental Determination ◽  
Volume Change ◽  
Hydrostatic Compression ◽  
Cellular Solids

Modeling of average surface energy estimator using computational intelligence technique

2015 ◽  
Vol 11 (2) ◽  
pp. 284-296 ◽  
Author(s):  
Taoreed O Owolabi ◽  
Kabiru O Akande ◽  
Olatunji O Sunday
Keyword(s):  
Melting Point ◽  
Surface Energy ◽  
Experimental Determination ◽  
Computational Intelligence ◽  
Content Type ◽  
Average Surface ◽  
Surface Energies ◽  
Computational Intelligence Technique ◽  
Intelligence Technique

Purpose – The surface energy per unit area of material is known to be proportional to the thermal energy at the melting point of the material. The purpose of this paper is to employ the values of the melting points of metals to develop a model that estimates the average surface energies of metals. Average surface energy estimator (ASEE) was developed with the aid of computational intelligence technique on the platform of support vector regression (SVR) using the values of the melting point of the materials as the descriptor. Design/methodology/approach – The development of ASEE which involves 12 data set was conducted by training and testing SVR model using test-set-cross-validation technique. The developed model (ASEE) was used to estimate average surface energies of 3d, 4d, 5d and other selected metals in the periodic table. The average surface energies obtained from ASEE are in good agreement with the experimental values and with the values from other theoretical models. Findings – The accuracy of this developed model coupled with its adoption of descriptor that can be easily obtained makes it a viable alternative in circumventing the difficulty experienced in experimental determination of average surface energies of materials. Originality/value – Modeling of ASEE has never been reported in the literature. Meanwhile, the use of ASEE will help circumvent the difficulties involved in the experimental determination of average surface energies of materials.

Experimental determination of the thermal conductivity of liquid UO2 near the melting point

2007 ◽  
Vol 101 (9) ◽  
pp. 093508 ◽  
Author(s):  
M. Sheindlin ◽  
D. Staicu ◽  
C. Ronchi ◽  
L. Game-Arnaud ◽  
B. Remy ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Melting Point ◽  
Experimental Determination

Experimental determination of a state equation for dissipative granular gases

1999 ◽  
Vol 96 (6) ◽  
pp. 1111-1116 ◽  
Author(s):  
E. Falcon ◽  
S. Fauve ◽  
C. Laroche
Keyword(s):  
Experimental Determination ◽  
State Equation ◽  
Granular Gases
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