Autor segons l'article: Basyrova, Liza; Bukina, Vasilisa; Balabanov, Stanislav; Belyaev, Alexander; Drobotenko, Viktor; Dymshits, Olga; Alekseeva, Irina; Tsenter, Marina; Zapalova, Svetlana; Khubetsov, Alexander; Zhilin, Alexander; Volokitina, Anna; Vitkin, Vladimir; Mateos, Xavier; Serres, Josep Maria; Camy, Patrice; Loiko, Pavel;
Departament: Química Física i Inorgànica
Autor/s de la URV: Mateos Ferré, Xavier / Serres Serres, Josep Maria / Volokitina, Anna
Paraules clau: Transparent glass-ceramics Transparent glass ceramics Transparent glass Transparent ceramics Transparent ceramic Titanium oxides Spinel Spectroscopy Sol-gels Sol-gel process Sintering Silicate-glasses Silica Saturable absorbers Phase-separation Optical-properties Nanocrystals Nano-phase Microstructure Mgal2o4 spinel Mgal Metal ions Mean size Magnesium compounds Magnesium aluminosilicate glasses Lithium compounds Lattice-vibrations Iron oxides Iron ions Hot pressing Ground state Glass-ceramics Glass ceramics Fluorine compounds Ferrous iron Comparatives studies Aluminosilicates Aluminate spinel Absorption saturation
Resum: We report on a comparative study of a transparent Fe:MgAl2O4 (spinel) ceramics and a transparent nanophase Fe: MgAl2O4-based glass-ceramics. The 0.1 mol% Fe:MgAl2O4 ceramics was synthesized by hot pressing (at 1500 degrees C/50 MPa) of powders obtained by the sol-gel method using LiF as a sintering aid. The Fe:MgAl2O4 ceramic is a single-phase material (cubic structure, sp. gr. Fd3(-) m, a = 8.083 angstrom) with a mean grain size of similar to 50 mu m. The ceramic exhibits a broadband transparency of 0.2-6.0 mu m and a high in-line transmission at similar to 1 mu m of 74.4%. The iron ions are presented in the ceramics in the single state of Fe2+ species in tetrahedral (T-d) sites. A broad absorption band spanning from similar to 1.2 to 3.7 mu m assigned to the E-5 -> T-5(2) (D-5) transition of Fe2+ ions in T-d sites is observed, corresponding to a ground-state absorption cross section of 0.28 x 10(-18) cm(2) at 1.90 mu m. The glass-ceramics were prepared by secondary two-stage heat-treatments of the magnesium aluminosilicate glass nucleated by titanium oxide and doped with 0.1 mol% FeO. Transparent Fe:MgAl2O4-based glass-ceramics obtained at the temperature of the second stage of 800-1000 degrees C were multi-phase materials containing two crystalline nanophases, i.e., spinel (mean size: 3.7-7.4 nm) and magnesium aluminotitanate solid solution (mean size: 6.4-20.6 nm), as well as residual silica-rich glass. Glass-ceramics obtained at the temperature of the second stage of 1050 degrees C were transparent and based on Fe-doped sapphirine. For glass-ceramics, absorption has a much more complex character as it is caused by interplay of iron and titanium ions in different valence states, coordination sites and locations. The iron ions enter the spinel nanocrystals but unlike the ceramic, in the form of both Fe-VI(2+) and Fe-IV(2+) species. The developed ceramics and glass-ceramics are promising for saturable absorbers of mid-infrared (2-3 mu m) lasers.
Àrees temàtiques: Química Optics Odontología Medicina ii Medicina i Materiais Interdisciplinar General chemistry Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Condensed matter physics Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciência de alimentos Chemistry (miscellaneous) Chemistry (all) Biotecnología Biophysics Biochemistry Atomic and molecular physics, and optics Astronomia / física
Accès a la llicència d'ús: https://creativecommons.org/licenses/by/3.0/es/
Adreça de correu electrònic de l'autor: josepmaria.serres@urv.cat anna.volokitina@estudiants.urv.cat xavier.mateos@urv.cat
Identificador de l'autor: 0000-0002-4299-538X 0000-0002-6091-6534 0000-0003-1940-1990
Data d'alta del registre: 2024-07-27
Versió de l'article dipositat: info:eu-repo/semantics/acceptedVersion
URL Document de llicència: https://repositori.urv.cat/ca/proteccio-de-dades/
Referència a l'article segons font original: Journal Of Luminescence. 236
Referència de l'ítem segons les normes APA: Basyrova, Liza; Bukina, Vasilisa; Balabanov, Stanislav; Belyaev, Alexander; Drobotenko, Viktor; Dymshits, Olga; Alekseeva, Irina; Tsenter, Marina; Zap (2021). Synthesis, structure and spectroscopy of Fe2+:MgAl2O4 transparent ceramics and glass-ceramics. Journal Of Luminescence, 236(), -. DOI: 10.1016/j.jlumin.2021.118090
Entitat: Universitat Rovira i Virgili
Any de publicació de la revista: 2021
Tipus de publicació: Journal Publications
Repositori URV