Rezende, MVDS, Valerio, MEG and Jackson, RA ORCID: https://orcid.org/0000-0002-1163-6421 (2015) Study of Eu3+ -> Eu2+ reduction in BaAl2O4:Eu prepared in different gas atmospheres. Materials Research Bulletin, 61. 348 -351.

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Abstract

The effect of different gas atmospheres such as H2(g), synthetic air, carbon monoxide (CO) and nitrogen (N2) on the Eu3+ → Eu2+ reduction process during the synthesis of Eu-doped BaAl2O4 was studied using synchrotron radiation. The Eu3+ → Eu2+ reduction was monitored analyzing XANES region when the sample are excited at the Eu LIII-edge. The results show that the hydrogen reducing agent are the most appropriate gas for Eu2+ stabilization in BaAl2O4 and that only a part of the Eu ions can be stabilized in the divalent state. A model of Eu reduction process, based on the incorporation of charge compensation defects, is proposed.

Item Type: Article
Uncontrolled Keywords: Optical materials, XAFS (EXAFS and XANES), Optical properties
Subjects: Q Science > QC Physics
Q Science > QE Geology
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 17 Feb 2015 16:59
Last Modified: 15 May 2019 08:19
URI: http://eprints.keele.ac.uk/id/eprint/288

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