80SiO2-20LaF3 oxyfluoride glass ceramic coatings doped with Nd3+ for optical applications
Transparent glass ceramic (GC) films and self-supported layers of composition 80SiO-20LaF doped with Nd were prepared by sol-gel method for the first time. GC films were deposited by dip coating on different substrates and heat-treated between 350°C and 850°C for 1, 3, and 80 hours. The structural a...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/177431 |
| Acceso en línea: | http://hdl.handle.net/10261/177431 |
| Access Level: | acceso abierto |
| Palabra clave: | Sol-gel Glass manufacturing Glass ceramics Coatings Photoluminesence Oxyfluoride Optical properties |
| Sumario: | Transparent glass ceramic (GC) films and self-supported layers of composition 80SiO-20LaF doped with Nd were prepared by sol-gel method for the first time. GC films were deposited by dip coating on different substrates and heat-treated between 350°C and 850°C for 1, 3, and 80 hours. The structural analysis of thin films was performed by GI-XRD and HR-TEM to check the LaF nanocrystals precipitation in the SiO matrix, revealing a crystal size lower than 5 nm. The emission and excitation spectra and lifetimes of the films have been obtained for different thermal treatments and Nd contents. The luminescence intensity of the F →I laser transition increases with the treatment temperature and Nd content, whereas a reduction for the luminescence lifetime is observed compared to those observed in bulk samples prepared by melting quenching. |
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