Abstract
Employing electrochemical cells with the solid zirconia electrolyte:
Cu2O,CuO /O2- / air
Cu2In2O5, In2O3,Cu2O / O2-/ air
In,In2O3 /O2-/ Ni, NiO
Gibbs free energy of formation of solid Cu2In2O5 phase as well as that for In2O3 and CuO oxides was determined in the temperature range from 973 K to 1372 K. The results obtained in this study were used to derive Gibbs free energy change of the reaction of formation of the ternary compound from respective oxides:
2CuO + In2O3 = Cu2In2O5
which is equal to: (±1400 J/mol). Oxygen potential diagrams for the Cu–In–O system are also given at two temperatures.
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References
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