Thermodynamic analysis of phase diagrams of binary solid solutions of ascending and minimum types: Na2SO4–Ag2SO4, Ag2SO4–K2SO4, Na2SO4–K2SO4

1989 ◽  
Vol 67 (9) ◽  
pp. 1468-1471
Author(s):  
Patrick C. Dawson ◽  
E. A. Secco ◽  
William M. Oxner
Keyword(s):  
Binary System ◽  
Phase Diagrams ◽  
Thermodynamic Analysis ◽  
Solid Solutions ◽  
Condensed Phase ◽  
Solid Phase ◽  
Ionic Melts

The thermodynamic analysis of the condensed phase diagrams of binary system solid solutions of the ascending type, viz. Na2SO4–Ag2SO4 and of the minimum type, ameltrope, viz. Ag2SO4–K2SO4, Na2SO4–K2SO4 is presented. The analysis identifies the basis for ameltrope behavior and provides for the evaluation of α, the fraction of dissociation, and ΔHDiss, the enthalpy of dissociation, of the dissociating component. Keywords: alkali sulfates solid solutions, thermodynamic analysis ameltropes, molten alkali sulfates dissociation, solid–solid phase diagrams, ionic melts.

Quasi-Thermodynamic Analysis of Metalorganic Vapor Phase Epitaxy of GaN

1997 ◽  
Vol 468 ◽  
Author(s):  
Shukun Duan ◽  
Dacheng Lu
Keyword(s):  
Phase Diagram ◽  
Phase Diagrams ◽  
Thermodynamic Analysis ◽  
Vapor Phase ◽  
Condensed Phase ◽  
Growth Temperature ◽  
Vapor Interface ◽  
Interface Phase ◽  
Movpe Growth ◽  
Reactor Pressure

ABSTRACTA thermodynamic analysis of GaN grown by MOVPE has been proposed based on quasi-thermodynamic equilibrium established on the solid-vapor interface. Phase diagrams for the MOVPE growth of GaN using TEGa and NH3 has been calculated. The phase diagram is consists of four phases regions: the region for single condensed phase of GaN, the region for double condensed phase of GaN (s) +Ga(l), the etching region with Ga droplets and the etching region without Ga droplets. The effect of growth temperature, reactor pressure, content of carrier gas, deposition ratio of NH3 and V/III ratio upon growth of GaN using MOVPE has been studied.

The Crystal-T algorithm: a new approach to calculate the SLE of lipidic mixtures presenting solid solutions

2014 ◽  
Vol 16 (31) ◽  
pp. 16740-16754 ◽  
Author(s):  
Guilherme J. Maximo ◽  
Mariana C. Costa ◽  
Antonio J. A. Meirelles
Keyword(s):  
Phase Diagrams ◽  
Solid Solutions ◽  
Solid Phase ◽  
New Approach

The Crystal-T algorithm accurately depicts the SLE phase diagrams of lipidic mixtures presenting solid solutions, measured in this work, by liquid and solid phase γ models.

The Na+, K+/CN-, I- binary systems

1990 ◽  
Vol 55 (7) ◽  
pp. 1741-1749
Author(s):  
Milan Drátovský ◽  
Bohumír Grüner ◽  
Ivan Horsák ◽  
Jiří Makovička
Keyword(s):  
Phase Diagram ◽  
Binary System ◽  
Phase Diagrams ◽  
Solid Solutions ◽  
Binary Systems ◽  
Smoothing Spline ◽  
Spline Functions ◽  
Solidus Curve

The phase diagram of the KCN-KI binary system was measured and the published phase diagrams of the KCN-NaCN, NaI-KI and NaCN-NaI systems were verified and completed. The systems form solid solutions with minima on the liquidus and solidus curves. The solid solutions in the KCN-KI system probably have a high segregation temperature, close to the solidus curve. For the four binary systems the experimental points were fitted with liquidus and solidus curves either by applying smoothing spline functions or by using two different models. The results obtained are discussed.

The Phase Stability in the Fe-B Binary System: Comparison between the Interstitial and Substitutional Models

2012 ◽  
Vol 322 ◽  
pp. 1-9 ◽  
Author(s):  
Z. Nait Abdellah ◽  
Redoune Chegroune ◽  
Mourad Keddam ◽  
B. Bouarour ◽  
L. Haddour ◽  
...  
Keyword(s):  
Binary System ◽  
Phase Diagrams ◽  
Solid Solutions ◽  
Phase Stability ◽  
Thermodynamic Stability ◽  
Thermodynamic Study ◽  
Thermodynamic Calculations ◽  
Chemical Potentials ◽  
Two Phases ◽  
Good Agreement

In the present work, a thermodynamic study was carried out in order to analyze the thermodynamic stability of the and phases in equilibrium with the phase using the calculation of phase diagrams (Calphad) formalism. The two phases and are modelled as substitutional and interstitial solid solutions of boron. The expressions of the chemical potentials ofBandFeare derived in both phases to perform the thermodynamic calculations. A comparison is made between the results provided by the substitutional and interstitial models and good agreement is observed between these two models.

Phase equilibria in the quasi-binary system Zn7Sb2O12–Li3Zn3Sb3O12 and thermal properties of Li3xZn7-4xSb2+xO12 solid solutions

2019 ◽  
Vol 45 (17) ◽  
pp. 23119-23125
Author(s):  
C. Tabasco-Novelo ◽  
J.F. May-Crespo ◽  
A. López-González ◽  
J.A. Marín-Romero ◽  
J.J. Alvarado-Gil ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Binary System ◽  
Phase Equilibria ◽  
Solid Solutions ◽  
Quasi Binary System

Thermodynamical study of (CaGa2S4)x(BaGa2S4)1−x solid solutions

2021 ◽  
pp. 2150469
Author(s):  
T. G. Naghiyev ◽  
R. M. Rzayev
Keyword(s):  
Free Energy ◽  
Solid Solutions ◽  
Calculation Method ◽  
Solid Phase ◽  
Ternary Compounds ◽  
Free Energy Of Formation ◽  
Concentration Dependences ◽  
Solid Phase Reactions ◽  
Two Phases ◽  
Energy Of Formation

The solid solutions of [Formula: see text] were synthesized by solid-phase reactions from powder components of CaS, BaS, and Ga2S3. The temperature-concentration dependences of the Gibbs free energy of formation of [Formula: see text] solid solutions from ternary compounds and phase diagrams of the CaGa2S4–BaGa2S4 were determined by a calculation method. It was revealed that continuous solid solutions are formed in these systems. The spinodal decomposition of [Formula: see text] solid solutions into two phases is predicted at ordinary temperatures.

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