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Título del libro:
Título del capítulo: Phase Equilibrium and New Solid Solutions in the Sc2O3-TiO2-Fe2O3 System at 1300 °C

Autores UNAM:
VICTOR EMMANUEL ALVAREZ MONTAÑO; SUBHASH SHARMA; ALEJANDRO CESAR DURAN HERNANDEZ;
Autores externos:

Idioma:

Año de publicación:
2025
Palabras clave:

Ternary systems; Titanium dioxide; X ray powder diffraction; Haematite; Innovative materials; Phase equilibriums; Pseudobrookite; Subsolidus regions; Technological applications; Ternary phase diagrams; TiO; TiO 2; Type structures; Hematite


Resumen:

In the quest for innovative materials for technological applications, this study investigates the phase equilibrium in the ternary system Sc2O3-TiO2-Fe2O3 at 1300 °C in air. Using the quenching method and powder X-ray diffractometry, we identified stable phases at this temperature. The binary phases Fe2TiO5, Sc2TiO5, and Sc4Ti3O12 are stable within the system. In the Fe2O3-Sc2O3 binary system, terminal solid 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 solution with the formula Sc2-2xFe2xTiO5 (0 = x = 1) and pseudobrookite-type structure exists along the Sc2TiO5-Fe2TiO5 phase junction, with lattice parameters conforming to Vegard's law. Additionally, the ternary system Sc2O3-TiO2-Fe2O3 features solid solutions with cubic C-type, hexagonal hematite-type, and orthorhombic pseudobrookite-type structures. © The Minerals, Metals & Materials Society 2025.


Entidades citadas de la UNAM: