Flux-Aided Synthesis of Lu2O3 and Lu2O3:Eu—Single Crystal Structure, Morphology Control and Radioluminescence Efficiency

Materials

Justyna Zeler¹  Lucjan B. Jerzykiewicz¹  Eugeniusz Zych¹ 

[1] Faculty of Chemistry, University of Wroclaw, 14. F. Joliot-Curie Street, 50-383 Wroclaw, Poland; E-Mails:

关键词: lutetium oxide;    flux synthesis;    single crystal structure;    radioluminescence;   

DOI  :  10.3390/ma7107059

来源: mdpi

【 摘 要 】

Li₂SO₄ or (Li₂SO₄ + SiO₂)-mixture fluxes were used to prepare a Lu₂O₃:Eu powder phosphor as well as an undoped Lu₂O₃ utilizing commercial lutetia and europia as starting reagents. SEM images showed that the fabricated powders were non-agglomerated and the particles sizes varied from single microns to tens of micrometers depending largely on the flux composition rather than the oxide(s)-to-flux ratio. In the presence of SiO₂ in the flux, certain grains grew up to 300–400 μm. The lack of agglomeration and the large sizes of crystallites allowed making single crystal structural measurements and analysis on an undoped Lu₂O₃ obtained by means of the flux technique. The cubic structure with a = 10.393(2) Å, and Ia3 space group at 298 K was determined. The most efficient radioluminescence of Lu₂O₃:Eu powders reached 95%–105% of the commercial Gd₂O₂S:Eu.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.