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Synthesis and functionality of the storage phosphor BaFBr:Eu[sup 2+]

Hesse, S. ; Zimmermann, J. ; Seggern, H. von ; Meng, X. ; Fasel, C. ; Riedel, R. (2009):
Synthesis and functionality of the storage phosphor BaFBr:Eu[sup 2+].
In: Journal of Applied Physics, 105 (6), pp. 063505. AIP, ISSN 00218979,
[Article]

Abstract

The present paper relates to a method for synthesizing the photostimulable storage phosphor BaFBr:Eu2+ that features high stimulation characteristics for use in image plates. All previous synthesis routes consist of a multistep process whereas the presented route is a one-step synthesis. Starting compounds are BaCO3, NH4F, and NH4Br, as well as EuF3 where the ammonium compounds are highly volatile at temperatures below 300 °C. Their reaction products initiate the decomposition of BaCO3 and form BaFBr. The incorporation of F-centers and europium ions occurs at temperature exceeding 550 °C. The individual reaction steps are monitored by simultaneous thermal analysis (thermogravimetry/differential thermal analysis) and the gaseous reaction products are detected by in situ mass spectroscopy. Intermediate and final products are characterized by x-ray diffraction techniques to determine the involved phases. Photoluminescence spectra reveal the typical emission peak of Eu2+ accompanied by a redshifted emission band at 470 nm, which was assigned to oxygen incorporated into the BaFBr lattice. The synthesized powders exhibit small grain sizes well suited for the use in image plates. © 2009 American Institute of Physics.

Item Type: Article
Erschienen: 2009
Creators: Hesse, S. ; Zimmermann, J. ; Seggern, H. von ; Meng, X. ; Fasel, C. ; Riedel, R.
Title: Synthesis and functionality of the storage phosphor BaFBr:Eu[sup 2+]
Language: English
Abstract:

The present paper relates to a method for synthesizing the photostimulable storage phosphor BaFBr:Eu2+ that features high stimulation characteristics for use in image plates. All previous synthesis routes consist of a multistep process whereas the presented route is a one-step synthesis. Starting compounds are BaCO3, NH4F, and NH4Br, as well as EuF3 where the ammonium compounds are highly volatile at temperatures below 300 °C. Their reaction products initiate the decomposition of BaCO3 and form BaFBr. The incorporation of F-centers and europium ions occurs at temperature exceeding 550 °C. The individual reaction steps are monitored by simultaneous thermal analysis (thermogravimetry/differential thermal analysis) and the gaseous reaction products are detected by in situ mass spectroscopy. Intermediate and final products are characterized by x-ray diffraction techniques to determine the involved phases. Photoluminescence spectra reveal the typical emission peak of Eu2+ accompanied by a redshifted emission band at 470 nm, which was assigned to oxygen incorporated into the BaFBr lattice. The synthesized powders exhibit small grain sizes well suited for the use in image plates. © 2009 American Institute of Physics.

Journal or Publication Title: Journal of Applied Physics
Journal volume: 105
Number: 6
Publisher: AIP
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science > Electronic Materials
Date Deposited: 12 Apr 2012 08:48
Official URL: http://dx.doi.org/10.1063/1.3086648
Identification Number: doi:10.1063/1.3086648
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