dc.contributor.author | Sedano Rodríguez, María de las Mercedes | |
dc.contributor.author | Babu, S. | |
dc.contributor.author | Balda de la Cruz, Rolindes | |
dc.contributor.author | Fernández Rodríguez, Joaquín Manuel | |
dc.contributor.author | Durán, Alicia | |
dc.contributor.author | Pascual, María Jesús | |
dc.date.accessioned | 2023-06-22T17:38:14Z | |
dc.date.available | 2023-06-22T17:38:14Z | |
dc.date.issued | 2023-07 | |
dc.identifier.citation | Journal of Alloys and Compounds 948 : (2023) // Article ID 169552 | es_ES |
dc.identifier.issn | 0925-8388 | |
dc.identifier.issn | 1873-4669 | |
dc.identifier.uri | http://hdl.handle.net/10810/61568 | |
dc.description.abstract | Tm3+ doped oxyfluoride glass-ceramics (GCs) containing NaLaF4 nanocrystals (NCs) have been obtained by spark plasma sintering (SPS). First, the precursor glasses were melted and then milled and sieved to a suitable particle size. Glass powder pellets were sintered by spark plasma sintering under vacuum conditions. The SPS processing parameters (temperature, pressure, and holding time) were optimized to obtain transparent glass-ceramics. The times of SPS processing are considerably shorter compared with those for the preparation of these GCs by conventional thermal treatment. All glass-ceramics contain nanocrystals of the β- NaLaF4 phase with an average crystal size of 20 nm, but the more highly doped samples (2Tm3+ and 0.5Tm3+/2Yb3+) show evidence of the presence of another phase corresponding with α-NaLaF4. The luminescence properties of the near infrared (NIR) emissions of Tm3+ for different concentrations reveal the presence of concentration quenching of the 3H4 and 3F4 levels. The analysis of the decay from the 3H4 level with increasing concentration is consistent with a dipole-dipole quenching process assisted by energy migration, whereas the self-quenching of the 3F4→3H6 emission can be attributed to fast diffusion. Energy transfer between Yb3+ and Tm3+ ions is confirmed by the NIR and upconverted (UC) emissions after Yb3+ excitation at 975 nm. No UC emission is observed under 791 nm excitation of Tm3+ ions. | es_ES |
dc.description.sponsorship | Funding from MICINN under project PID2020–115419 GB-C-21/C-22/AEI/10.13039/501100011033 is acknowledged. This paper is part of the dissemination activities of project FunGlass. This project has received funding from the European Union´s Horizon 2020 research and innovation program under grant agreement No 739566. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/739566 | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICINN/PID2020–115419 GB-C-21 | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICINN/PID2020–115419 GB-C-22 | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/es/ | * |
dc.subject | transparent glass-ceramics | es_ES |
dc.subject | NaLaF4 | es_ES |
dc.subject | spark plasma sintering | es_ES |
dc.subject | oxyfluoride glass-ceramics | es_ES |
dc.subject | Tm3+ ions | es_ES |
dc.title | Spark plasma sintering and optical properties of Tm3+ and Tm3+ /Yb3+ doped NaLaF4 transparent glass-ceramics | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.holder | © 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). | es_ES |
dc.rights.holder | Atribución 3.0 España | * |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0925838823008551 | es_ES |
dc.identifier.doi | 10.1016/j.jallcom.2023.169552 | |
dc.contributor.funder | European Commission | |
dc.departamentoes | Física aplicada I | es_ES |
dc.departamentoeu | Fisika aplikatua I | es_ES |