Synthesis of Eu-doped SrAl2O4 nanophosphors by CO2 laser vaporization

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Zollfrank C, Gruber S, Batentschuk M, Osvet A, Götz-Neunhoeffer F, Dittrich S, Grabow J, Kurland HD, Müller FA
Zeitschrift: Acta Materialia
Verlag: Elsevier
Jahr der Veröffentlichung: 2013
Band: 61
Heftnummer: 19
Seitenbereich: 7133-7141
ISSN: 1359-6454
Sprache: Englisch


Abstract


A new method of synthesizing spherical nanoparticles with photoluminescent spinel structures using a CO2 laser co-vaporization technique (CoLAVA) is presented. The method applies homogeneous mixtures of oxidic precursors such as Al2O3, SrO and Eu2O 3 and allows the fabrication of quantities exceeding 10 g h -1. During the CoLAVA process, the educt oxides are reacted by a gas phase condensation yielding amorphous spherical particles with diameters ranging from 10 to 100 nm. The as-prepared materials exhibit red emission at 625 nm (1.98 eV) due to the incorporated Eu3+. Temperature treatment up to 1200 C under a reducing atmosphere yielded crystalline particles of the same size, which were slightly sintered. These particles consisted of >90 wt.% SrAl2O4 with minor fractions of Sr3Al 2O6 and SrCO3. The amount of the SrAl 2O4 spinel increased with increasing temperature, whereas the accompanying phases were decreased. A strong green emission centered at 525 nm (2.36 eV) detected at RT was observed at an onset temperature of 900 C, which is due to the presence of Eu2+ in the crystal lattice of SrAl 2O4. The red emission was not observed at higher annealing temperatures. The CoLAVA method represents a fast and facile route for the fabrication of nano- to microstructured phosphor materials for a variety of engineering applications. © 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Batentschuk, Miroslaw PD Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Dittrich, Sebastian
Lehrstuhl für Mineralogie
Götz-Neunhoeffer, Friedlinde Prof. Dr.
Lehrstuhl für Mineralogie
Gruber, Sabine
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)
Osvet, Andres Dr.
Lehrstuhl für Werkstoffwissenschaften (Materialien der Elektronik und der Energietechnologie)
Zollfrank, Cordt PD Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)


Einrichtungen weiterer Autorinnen und Autoren

Friedrich-Schiller-Universität Jena
Universität des Saarlandes


Zitierweisen

APA:
Zollfrank, C., Gruber, S., Batentschuk, M., Osvet, A., Götz-Neunhoeffer, F., Dittrich, S.,... Müller, F.A. (2013). Synthesis of Eu-doped SrAl2O4 nanophosphors by CO2 laser vaporization. Acta Materialia, 61(19), 7133-7141. https://dx.doi.org/10.1016/j.actamat.2013.08.010

MLA:
Zollfrank, Cordt, et al. "Synthesis of Eu-doped SrAl2O4 nanophosphors by CO2 laser vaporization." Acta Materialia 61.19 (2013): 7133-7141.

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