Thermodynamic assessment of oxide system In2O3‑SnO2‑ZnO

Received: 28.11.2018. Accepted: 14.12.2018. Published: 31.12.2018.The In2O3‑SnO2‑ZnO system is of special interest for applications as transparent conducting oxides and also transparent semiconductors. In the present work, a thermodynamic assessment for this system is discussed using all available experimental data on phase equilibria and thermodynamic properties. All subsystems including elemental combinations were considered in order to generate a self-consistent Gibbs energy dataset for further calculation and prediction of thermodynamic properties of the system. The modified associate species model was used for the description of the liquid phase. Particular attention was given to two significant solid solution phases: Spinel with the formula Zn(2–x)Sn(1–x)In2xO4 based on Zn2SnO4 and Bixbyite based on In2O3 and extending strongly toward the SnZnO3 composition according to the formula In(2–2x)SnxZnxO3. In addition to the component oxides, nine quasi-binary compounds located in the In2O3‑ZnO binary subsystem have also been included in the database as stoichiometric phases

Critical Thermodynamic Evaluation of Oxide Systems Relevant to Fuel Ashes and Slags, Part 5: Potassium Oxide-Alumina-Silica

The K2O-Al2O3-SiO2 system has been thermodynamically assessed. The associate species model was applied to the liquid phase while the solubility of SiO2 in KAlO2 has been treated with a multi-sublattice model. The resulting new databank was used for the representation of the phase equilibria in the ternary system including several quasi-binary sections of the ternary diagram. The calculated phase relations are in good agreement with the experimental data. The phase equilibria in the unmeasured region were proposed on the basis of the obtained new databank. (C) 2010 Elsevier Ltd. All rights reserved

Critical Thermodynamic Evaluation of Oxide Systems Relevant to Fuel Ashes and Slags. Part 2: Alkali Oxide - Alumina Sytems

The associate species model was applied to the thermodynamic representation of liquids in the oxide systems Na2O-Al2O3 and K2O-Al2O3. The available experimental phase diagrams and thermodynamic data were collected and evaluated for the purpose of improving the solution database. These new data for the liquid phase, and for the solid compounds Na beta- and beta"-alumina, are compatible with data for the solid stoichiometric compounds from the FACT Pure Substance database. The phase equilibria calculated using the new optimised solution data show good agreement with the experimental results. (C) 2006 Elsevier Ltd. All rights reserved

Critical Thermodynamic Evaluation of Oxide Systems Relevant to Fuel Ashes and Slags: Part 3: Silica–alumina system

The Al2O3-SiO2 system was reassessed using the associate species model for the liquid and the sublattice and associate species model for the mullite. The available phase diagram data were collected and evaluated for the purpose of improving the solution database. The new data for the liquid phase and mullite are compatible with data for the pure stoichiometric component oxides from the FACT Pure Substance database. The phase equilibria re-calculated using the improved solution data are in good agreement with experimental data. This work continues the studies concerning the thermodynamic assessment of oxide systems relevant to ashes and slags. (C) 2007 Elsevier Ltd. All rights reserved

Critical Thermodynamic Evaluation of Oxide Systems Relevant to Fuel Ashes and Slags, Part 4: Sodium Oxide - Potassium Oxide - Silica

A thermochemical assessment was performed for the system K2O-Na2O-SiO2. The modified associate species model was applied to the ternary liquid in the system. All binary subsystems remained unchanged. The new databank was used for the representation of the phase equilibria in the ternary system including the quasi-binary sections of the ternary diagram. The calculated phase relations are in good agreement with the experimental data. The phase equilibria in the experimentally uninvestigated region near the alkali oxide edge are proposed as extrapolations using the new databank. (C) 2008 Elsevier Ltd. All rights reserved