Low-temperature phase formation in the ZrO2–In2O3 system

This study provides insights into the phase transformations of In₂O₃–ZrO₂ system under varying thermal and chemical conditions and the crystallization behavior of amorphous precursors containing 10–30 mol% In₂O₃, synthesized via the coprecipitation of oxides from chloride solutions. When subjected to molten sodium nitrate at 500 °C, a cubic solid solution of Zr_{1 – x}In_xO_{2 – 0.5x} is obtained. Conversely, exposure to molten sodium sulfate at 1000 °C results in the formation of the mixture consisting of In₂O₃ and monoclinic ZrO₂, with no evidence of intermediate phases including any ordered fluorite-like structures.