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In the quest for innovative materials for technological applications, this study investigates the phase equilibrium in the ternary system Sc2O3-TiO2TiO2-Fe2O3 at 1300 °C in air. Using the quenching method and powder X-ray diffractometry, we identified stable phases at this temperatureTemperature. The binary phases Fe2TiO5, Sc2TiO5, and Sc4Ti3O12 are stable within the system. In the Fe2O3-Sc2O3 binary system, terminal solid solutionsSolid solutions with C-type cubic structure (Sc2-2xFe2xO3, 0 ≤ x ≤ 0.57) and hematite-type hexagonal structure (Fe2-2xSc2xO3, 0 ≤ x ≤ 0.23) were observed. A solid solutionSolid solutions with the formula Sc2-2xFe2xTiO5 (0 ≤ x ≤ 1) and pseudobrookite-type structure exists along the Sc2TiO5-Fe2TiO5 phase junction, with latticeLattice parameters conforming to Vegard's law. Additionally, the ternary system Sc2O3-TiO2TiO2-Fe2O3 features solid solutionsSolid solutions with cubic C-type, hexagonal hematite-type, and orthorhombic pseudobrookite-type structures.

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Phase Equilibrium and New Solid Solutions in the Sc2O3-TiO2-Fe2O3 System at 1300 °C

  • 会议论文

  • 发表日期：

    2025年

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  • Victor Emmanuel Alvarez-Montaño,
  • Francisco Brown,
  • Subhash Sharma,
  • Miguel Olivas-Martínez,
  • Alejandro Durán

摘要

In the quest for innovative materials for technological applications, this study investigates the phase equilibrium in the ternary system Sc2O3-TiO2TiO2-Fe2O3 at 1300 °C in air. Using the quenching method and powder X-ray diffractometry, we identified stable phases at this temperatureTemperature. The binary phases Fe2TiO5, Sc2TiO5, and Sc4Ti3O12 are stable within the system. In the Fe2O3-Sc2O3 binary system, terminal solid solutionsSolid solutions with C-type cubic structure (Sc2-2xFe2xO3, 0 ≤ x ≤ 0.57) and hematite-type hexagonal structure (Fe2-2xSc2xO3, 0 ≤ x ≤ 0.23) were observed. A solid solutionSolid solutions with the formula Sc2-2xFe2xTiO5 (0 ≤ x ≤ 1) and pseudobrookite-type structure exists along the Sc2TiO5-Fe2TiO5 phase junction, with latticeLattice parameters conforming to Vegard's law. Additionally, the ternary system Sc2O3-TiO2TiO2-Fe2O3 features solid solutionsSolid solutions with cubic C-type, hexagonal hematite-type, and orthorhombic pseudobrookite-type structures.