Thermodynamic assessment of oxide system In₂O₃-SnO₂-ZnO

Abstract

The In 2 O 3 -SnO 2 -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) In 2x O 4 based on Zn 2 SnO 4 and Bixbyite based on In 2 O 3 and extending strongly toward the SnZnO 3 composition according to the formula In (2-2x) Sn x Zn x O 3 . In addition to the component oxides, nine quasi-binary compounds located in the In 2 O 3 -ZnO binary subsystem have also been included in the database as stoichiometric phases.

A Novel Route to Fibers with Incongruent and Volatile Crystalline Semiconductor Cores: GaAs

“…Metallic tin is known to oxidize quite readily at temperatures of only 100 °C, 37 and of the common oxides of tin, SnO and SnO 2 , the latter is a solid for all the temperatures experienced by the fiber during both draw and laser annealing. 38 The former, tin monoxide, has a melting point at about 1040 °C and, possibly, could have segregated during laser annealing along with molten Sn metal. That being said, the Sn−O phase diagram is fairly complex 37 and the origin of the excess O (i.e., beyond that due to SiO 2 ) is a focus of continuing work.…”

The ZnO-In2O3 Oxide System as a Material for Low-Temperature Deposition of Transparent Electrodes

“…The identification of the forming secondary phase using the PDF ICDD database showed that the observed peaks correspond to the compound In 2 Zn 5 O 8 (JCPDS 01-089-8974). It was noted recently that in the ZnO-In 2 O 3 binary system, along with zinc and indium oxides, the most stable compound from the homologous series In 2 Zn k O k+3 (k = 3-7, 9, 11, 13 b 15) is In 2 Zn 5 O 8 at sintering temperatures up to 1100 • C [19].…”

Leaching of liquation-feeding furnace dross as a first step for germanium recovery

“…Gibbs free energies of possible reactions were estimated using HSC Chemistry 9.6.1 software (Metso, Finland) Reaction Equations module. Data for Zn 2 SnO 4 were found in the literature [ 28 ]. Due to the lack of thermodynamic data for ZnSnO 3 , Cu 5 Ge 2 and Ge(OH) 2 (C 2 O 4 ) 2 2− values for respective mixtures, i.e.…”