Wydział Chemii

Joanna Trojan-Piegza

Eugeniusz Zych

2004

Journal of Alloys and Compounds

380

118-122

10.1016/j.jallcom.2004.03.037

Naukowa

Angielski

Artykuł

The paper reports on the course of decomposition of hydrated lutetium nitrate and lutetium chloride to Lu₂O₃ in the eutectic mixture of NaNO₂ and KNO₂. It was shown that a crystallographically pure phase of the cubic Lu₂O₃ is formed at temperature as low as 250 °C. IR spectra revealed that the recovered powder contains some OH-contamination, however. The powders are characterized by crystallites sizes in the range of 18–30 nm in average. Emission and excitation spectra of Eu-doped powders show characteristic features for Eu³⁺ ion in an oxide host, which indicates that the procedure is appropriate for making activated nanoparticulate oxide phosphors. Most profound emission appears around 611 nm and the luminescence from the powder made starting with Lu(NO₃)₃ was noticeably higher compared to the product obtained from LuCl₃. The excitation spectrum of Eu³⁺ emission at 611 nm contains a band related to the fundamental absorption of the lutetia host lattice, which indicates an existence of the host-to-activator energy transfer.

Lu2O3, Chemical synthesis, Molten salts synthesis, Nanostructured phosphors

https://doi.org/10.1016/j.jallcom.2004.03.037

http://www.elsevier.com