Structural properties of fluorozirconate-based glass ceramics doped with multivalent europium

Journal Article · Wed Oct 10 04:00:00 EDT 2012 · J. Appl. Phys.

DOI:https://doi.org/10.1063/1.3662148· OSTI ID:1049547

PaBlick, C; Müller, O; Lützenkirchen-Hecht, D; Frahm, R; Johnson, J A; Schweizer, S ^[1]

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1. U. Halle

The structure/property relationships of fluorochlorozirconate glass ceramics as a function of divalent and trivalent europium (Eu) co-doping and thermal processing have been investigated; the influence of doping ratio on the formation of barium chloride (BaCl2) nanocrystals therein was elucidated. X-ray absorption near-edge structure spectroscopy shows that the post-thermal annealing changes the Eu valence of the as-poured glass slightly, but during the melting process Eu3+ is more strongly reduced to Eu2+, in particular, when doped as a chloride instead of fluoride compound. The Eu2+-to-Eu3+ doping ratio also plays a significant role in chemical equilibrium in the melt. X-ray diffraction measurements indicate that a higher Eu2+ fraction leads to a BaCl2 phase transition from hexagonal to orthorhombic structure at a lower temperature.

• Research Organization: Advanced Photon Source (APS), Argonne National Laboratory (ANL), Argonne, IL (US)
• Sponsoring Organization: NSFINDUSTRYOTHER U.S. STATES
• OSTI ID: 1049547
• Journal Information: J. Appl. Phys., Journal Name: J. Appl. Phys. Journal Issue: (11) ; 12, 2011 Vol. 110; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ANNEALING
BARIUM CHLORIDES
CERAMICS
CHLORIDES
EUROPIUM
FLUORIDES
GLASS
MELTING
PROCESSING
SPECTROSCOPY
VALENCE
X-RAY DIFFRACTION