Thermodynamic Analysis of the III–V Alloy Semiconductor Phase Diagrams

1972 ◽  
Vol 119 (6) ◽  
pp. 765 ◽  
Author(s):  
L. M. Foster ◽  
J. E. Scardefield ◽  
J. F. Woods
Keyword(s):  
Phase Diagrams ◽  
Thermodynamic Analysis

Binary common-ion alkali halide mixtures thermodynamic analysis of solid-liquid phase diagrams

Calphad ◽  
1983 ◽  
Vol 7 (3) ◽  
pp. 211-218 ◽  
Author(s):  
Harry A.J. Oonk ◽  
Jacobus G. Blok ◽  
Joke A. Bouwstra
Keyword(s):  
Liquid Phase ◽  
Phase Diagrams ◽  
Thermodynamic Analysis ◽  
Alkali Halide ◽  
Common Ion ◽  
Solid Liquid

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.

Thermodynamic Analysis of Steels by Incorporating First-Principles Calculations into the CALPHAD Approach

2007 ◽  
Vol 539-543 ◽  
pp. 2413-2418 ◽  
Author(s):  
Hiroshi Ohtani ◽  
N. Hanaya ◽  
Mitsuhiro Hasebe
Keyword(s):  
Phase Diagrams ◽  
Thermodynamic Analysis ◽  
First Principles ◽  
Experimental Information ◽  
Full Potential ◽  
Calphad Approach ◽  
First Principles Calculations ◽  
Plane Wave Method ◽  
Ternary Phase Diagrams ◽  
High Degree

A thermodynamic analysis of the Fe−M−P (M = Nb, Ti) ternary system has been performed by combining first-principles calculations with the CALPHAD approach. Because of the lack of experimental information available, thermodynamic properties of orthorhombic anti-PbCl2-type FeMP were evaluated using the Full Potential Linearized Augmented Plane Wave method, and the estimated values were introduced into a CALPHAD-type thermodynamic analysis. Applying this procedure, the phase diagrams of the Fe−M−P ternary phase diagrams whose contents are uncertain so far were calculated with a high degree of probability. Phase diagrams for high-purity ferritic stainless steels obtained following the same procedure are also presented.

scholarly journals Effects of CaO Addition on the Iron Recycling from Nickel Slags by Oxidation-Magnetic Separation

Metals ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 956 ◽  
Author(s):  
Yongbo Ma ◽  
Xueyan Du
Keyword(s):  
Phase Diagrams ◽  
Magnetic Separation ◽  
Thermodynamic Analysis ◽  
Crystallization Temperature ◽  
Total Iron ◽  
Iron Recovery ◽  
Characteristic Temperatures ◽  
Air Atmosphere

To recover iron from water-quenched nickel slags, CaO was added. Thermodynamic analysis showed that CaO promotes the reaction between fayalite (Fe2SiO4) and O2. Phase diagrams of the FeO-SiO2-MgO-CaO slag with various CaO contents in an air atmosphere drawn by FactSage 7.1 showed that the phase components can be significantly affected by the CaO contents. With increasing CaO content, the fusion characteristic temperatures decreased rapidly to a minimum and subsequently increased slightly. The oxidization of Fe2SiO4 in nickel slags was accelerated significantly by the addition of CaO, which led to an increase of FeO activity and decrease of Fe2O3 activity to promote the formation of MgFe2O4. Excess addition of CaO led to the formation of more silicates. In addition, the crystallization temperature was also reduced with increasing CaO content, causing less spinel to crystalize. With increasing CaO content, the iron recovery and yield of concentrate first increased and subsequently decreased, while the total iron (TFe) content was almost not influenced and maintained a relatively stable value.

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