Mechanisms of the Solid-State Synthesis of Ln2SrFe2O7 (Ln = La, Nd, Gd, Dy) Layered Perovskite-Related Phases
- Autores: Tugova E.1
-
Afiliações:
- Ioffe Institute
- Edição: Volume 89, Nº 11 (2019)
- Páginas: 2295-2300
- Seção: Article
- URL: https://journals.rcsi.science/1070-3632/article/view/223174
- DOI: https://doi.org/10.1134/S1070363219110215
- ID: 223174
Citar
Resumo
The formation mechanisms for a series of n = 2 Ruddlesden-Popper phases Ln2SrFe2O7 (Ln = La, Nd, Gd, Dy) in the Ln2O3-SrO-Fe2O3 systems were determined. The solid-state synthesis of Ln2SrFe2O7 (Ln = La, Nd) proceeds by a mechanism involving the stage of formation of LnFeO3 and LnSrFeO4 intermediates with their subsequent interaction to form the target product. In the case of Gd2SrFe2O7 formation, two mechanisms are realized, namely, those going through the GdFeO3 + GdSrFeO4 and Gd2O3 + Gd0.5Sr0.5FeO3-α interaction stages. The limiting stage of the Dy2SrFe2O7 formation is the reaction between Dy2O3 and Dy0.5Sr0.5FeO3-α.
Palavras-chave
Sobre autores
E. Tugova
Ioffe Institute
Autor responsável pela correspondência
Email: katugova@inbox.ru
Rússia, St. Petersburg, 194021