Insights into phase formation in fluorochlorozirconate glass-ceramic storage phosphors

Journal Article · Mon May 08 00:00:00 EDT 2006 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2202688· OSTI ID:20779293

Gang, Chen; Johnson, Jacqueline; Woodford, John; Schweizer, Stefan ^[1]

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1. Energy Technology Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

We have studied the effect of oxide impurities on the formation of BaCl{sub 2} nanocrystals in Eu-doped fluorochlorozirconate glass-ceramic storage phosphors using x-ray absorption near-edge structure and x-ray diffraction analyses. It is found that annealing the glass with a relatively high level of oxide impurities causes crystallization of BaCl{sub 2} and a phase transition from hexagonal to orthorhombic BaCl{sub 2}. The latter phase is responsible for the storage phosphor effect. In contrast, the glass with a low impurity concentration forms hexagonal BaCl{sub 2}, but no such phase transition. Our study provides structural clues for understanding the x-ray storage mechanism in fluorozirconate-based glass ceramics.

• OSTI ID: 20779293
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 19 Vol. 88; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
ANNEALING
BARIUM CHLORIDES
CERAMICS
CHLORIDES
CRYSTALLIZATION
DOPED MATERIALS
EUROPIUM
FLUORIDES
GLASS
NANOSTRUCTURES
ORTHORHOMBIC LATTICES
OXIDES
PHOSPHORS
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
ZIRCONATES