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Kolekcje
Inne
Preparation, X-ray analysis and spectroscopic investigation of nanostructured Lu2O3:Tb.
Autorzy
Rok wydania
2001
Czasopismo
Journal of Alloys and Compounds
Numer woluminu
323-324
Strony
8-12
DOI
10.1016/S0925-8388(01)01005-2
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
Formation of Lu2O3 through combustion of Lu(NO3)3 and CO(NH2)2 (urea) at various temperatures was investigated. From XRD patterns analysis, the optimal reaction temperature was found to be ∼600–700°C. For that range products with crystallites of ∼7–13 nm were obtained, as found from TEM pictures. With the same technique Tb-doped Lu2O3 was successfully fabricated and its basic spectroscopic properties were characterized. Emission of the phosphors was found to be typical for Tb3+, with main components at 490 and 550 nm, resulting from radiative relaxation of 5D4 level. Undoped material produced broad-band luminescence peaking in blue. Raw Tb-doped samples were brownish, which was attributed to incorporation of some of the activator as Tb4+. Such assignment was derived from reflection, excitation and EPR spectra. The colour could be completely removed through post-fabrication vacuum heat-treatment at 1100°C.
Słowa kluczowe
Lutetium oxide, Tb luminescence, Tb3+, Tb4+, Combustion synthesis
Adres publiczny
https://doi.org/10.1016/S0925-8388(01)01005-2
Strona internetowa wydawcy
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