Phase equilibria in the system La2O3–Y2O3–SrO and spectral properties of La1–XSrXYO3–Δ
- Authors: Zuev M.G.1
-
Affiliations:
- Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences
- Issue: Vol 70, No 7 (2025)
- Pages: 953-958
- Section: ФИЗИКО-ХИМИЧЕСКИЙ АНАЛИЗ НЕОРГАНИЧЕСКИХ СИСТЕМ
- URL: https://journal-vniispk.ru/0044-457X/article/view/306851
- DOI: https://doi.org/10.31857/S0044457X25070115
- EDN: https://elibrary.ru/jontwx
- ID: 306851
Cite item
Abstract
Phase equilibria in the La2O3–Y2O3–SrO system in the subsolidus region at temperatures up to 1350°C have been studied. Solid solutions of La1–xSrxYO3–δ composition (x=0–0.26) and the region of solid solutions based on SrY2O4 compound, limited by the content of components (mol. %), were found: La2O3 from 0 to 15, Y2O3 from 28 to 50, SrO from 50 to 70). The obtained data on phase equilibria in the La2O3–Y2O3–SrO system are comparable to those of binary limiting systems. Vibrational spectra and X-ray luminescence spectra of La1–xSrxYO3–δ solid solutions have been recorded. OH- groups captured by the crystal lattice of La1–xSrxYO3–δ samples have been recorded from vibrational spectroscopy data. The formation of F-centres in the perovskite structure is shown, and the spectral and luminescence characteristics of these centres are considered. The intensity of X-ray luminescence of F-centres is proposed to estimate the level of capture of OH- groups by the perovskite lattice.
Keywords
About the authors
M. G. Zuev
Institute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences
Author for correspondence.
Email: zuev@ihim.uran.ru
Yekaterinburg, 620990 Russia
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