Seggern, Heinz von ; Hesse, Sabine ; Zimmermann, Jörg ; Appleby, Graham A. ; Meng, Xianguo ; Fasel, Claudia ; Riedel, Ralf (2010)
New synthesis of high-quality storage phosphors.
In: Radiation Measurements, 45 (3-6)
doi: 10.1016/j.radmeas.2009.11.027
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
We present a single step synthesis method for the photostimulable X-ray storage phosphor BaFBr:Eu2+ which results in a highly sensitive powder with a relatively small average grain size of 5.4 μm. The starting chemical reagents are BaCO3, NH4F, NH4Br and EuF3. The reaction initiated by the decomposition of the ammonium materials leads to highly volatile hydrogen halide gases which react with the BaCO3 to form BaFBr at temperatures up to 300 °C. Further heating results in the incorporation of Eu2+ and the formation of halide vacancies at temperatures in between 390 and 580 °C. The resulting photostimulated luminescence (PSL) efficiency is optimized after sintering at 800 °C. The reaction process is monitored by differential thermal analysis (DTA) and the reaction products are detected by mass-spectroscopy which confirms the proposed chemical reactions. Intermediate and final products are identified using X-ray diffraction. Photoluminescence (PL) and PSL spectra show the incorporation of Eu2+ into the lattice, as well as a PL peak at 470 nm which is not present in the PSL spectrum. This peak is shown to originate from O2− in the lattice and directly affects the PSL sensitivity.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2010 |
| Autor(en): | Seggern, Heinz von ; Hesse, Sabine ; Zimmermann, Jörg ; Appleby, Graham A. ; Meng, Xianguo ; Fasel, Claudia ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | New synthesis of high-quality storage phosphors |
| Sprache: | Englisch |
| Publikationsjahr: | 6 Januar 2010 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Radiation Measurements |
| Jahrgang/Volume einer Zeitschrift: | 45 |
| (Heft-)Nummer: | 3-6 |
| DOI: | 10.1016/j.radmeas.2009.11.027 |
| Kurzbeschreibung (Abstract): | We present a single step synthesis method for the photostimulable X-ray storage phosphor BaFBr:Eu2+ which results in a highly sensitive powder with a relatively small average grain size of 5.4 μm. The starting chemical reagents are BaCO3, NH4F, NH4Br and EuF3. The reaction initiated by the decomposition of the ammonium materials leads to highly volatile hydrogen halide gases which react with the BaCO3 to form BaFBr at temperatures up to 300 °C. Further heating results in the incorporation of Eu2+ and the formation of halide vacancies at temperatures in between 390 and 580 °C. The resulting photostimulated luminescence (PSL) efficiency is optimized after sintering at 800 °C. The reaction process is monitored by differential thermal analysis (DTA) and the reaction products are detected by mass-spectroscopy which confirms the proposed chemical reactions. Intermediate and final products are identified using X-ray diffraction. Photoluminescence (PL) and PSL spectra show the incorporation of Eu2+ into the lattice, as well as a PL peak at 470 nm which is not present in the PSL spectrum. This peak is shown to originate from O2− in the lattice and directly affects the PSL sensitivity. |
| Freie Schlagworte: | Image plate, Chemical synthesis, Storage phosphor, PSL, BaFBr:Eu2+, PL, Oxygen |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Elektronische Materialeigenschaften |
| Hinterlegungsdatum: | 05 Apr 2012 09:22 |
| Letzte Änderung: | 13 Aug 2021 14:08 |
| PPN: | |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum