| Texto completo | |
| Autor(es): |
Guene-Girard, S.
[1]
;
Courtois, J.
[1]
;
Dussauze, M.
[2]
;
Heintz, J-M
[1]
;
Fargues, A.
[1]
;
Roger, J.
[3]
;
Nalin, M.
[4]
;
Cardinal, T.
[1]
;
Jubera, V
[1]
Número total de Autores: 9
|
| Afiliação do(s) autor(es): | [1] Univ Bordeaux, ICMCB, Bordeaux INP, CNRS, UMR 5026, F-33600 Pessac - France
[2] Univ Bordeaux, ISM Inst Mol Sci, CNRS, UMR 5255, F-33405 Talence - France
[3] Univ Bordeaux, Lab Composites ThermoStruct, CNRS, UMR 5801, F-33600 Pessac - France
[4] Sao Paulo State Univ UNESP, Chem Inst, BR-14800060 Araraquara, SP - Brazil
Número total de Afiliações: 4
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Materials Research Bulletin; v. 143, NOV 2021. |
| Citações Web of Science: | 0 |
| Resumo | |
Ho3+-doped YNbO4 and Y3NbO7 phosphors were synthesised via a co-precipitation synthesis route. Structural characterisation and spectroscopic properties were performed as a function of the Ho3+ concentration. The Rietveld type-refinement confirms the stabilisation of the pure monoclinic Fergusonite YNbO4 phase at the highest temperatures, but the quadratic phase is stabilised for the lowest temperature, whereas a pure cubic fluorite Y3NbO7 phase was observed for all of the heat treatments. Raman and infrared spectroscopies were used to compare the cation-oxygen vibrational modes. Emission spectra and up-conversion processes were obtained under excitation at 445 and 975 nm respectively. For a similar Ho3+ content, the energy transfers observed show differences between the two crystalline compounds that are related to a stronger interaction between the holmium cations in the fluorite host lattice. (AU) | |
| Processo FAPESP: | 19/01223-0 - Estudo das propriedades ópticas e magnéticas de vidros óxidos de metais pesados e suas aplicações em impressão 3D |
| Beneficiário: | Marcelo Nalin |
| Modalidade de apoio: | Bolsas no Exterior - Pesquisa |
| Processo FAPESP: | 13/07793-6 - CeRTEV - Centro de Pesquisa, Tecnologia e Educação em Materiais Vítreos |
| Beneficiário: | Edgar Dutra Zanotto |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |