Structural transformations and spectroscopic properties of Ni-doped magnesium aluminosilicate glass-ceramics nucleated by a mixture of TiO2 and ZrO2 for broadband near-IR light emission
| العنوان: | Structural transformations and spectroscopic properties of Ni-doped magnesium aluminosilicate glass-ceramics nucleated by a mixture of TiO2 and ZrO2 for broadband near-IR light emission |
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| المؤلفون: | Alexander A. Zhilin, Gerard Lelong, Laurent Cormier, M. Tsenter, Kirill Bogdanov, Pavel Loiko, Aymeric Dugué, Irina Alekseeva, Olga Dymshits |
| المساهمون: | Institut de minéralogie, de physique des matériaux et de cosmochimie (IMPMC), Muséum national d'Histoire naturelle (MNHN)-Institut de recherche pour le développement [IRD] : UR206-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Center for Optical Technologies and Department of Materials Science and Engineering, Lehigh University, Department of Computer Science, University of Sheffield [Sheffield] |
| المصدر: | Journal of Alloys and Compounds Journal of Alloys and Compounds, Elsevier, 2019, 780, pp.137-146. ⟨10.1016/j.jallcom.2018.11.247⟩ |
| بيانات النشر: | Elsevier BV, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Materials science, Absorption spectroscopy, Analytical chemistry, 02 engineering and technology, engineering.material, 010402 general chemistry, 01 natural sciences, law.invention, symbols.namesake, law, Materials Chemistry, Redistribution (chemistry), [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], Crystallization, ComputingMilieux_MISCELLANEOUS, Mechanical Engineering, Spinel, Metals and Alloys, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Amorphous solid, Mechanics of Materials, symbols, engineering, Light emission, 0210 nano-technology, Raman spectroscopy, Luminescence |
| الوصف: | Ni:MgAl2O4 spinel shows a reversible random Ni2+ site redistribution with increasing temperature. With the aim of determining the influence of the structure evolution induced by heat-treatment on the nature of luminescence centers in NiO-doped spinel-based magnesium aluminosilicate glass-ceramics nucleated by a mixture of TiO2 and ZrO2, the detailed spectroscopic study of the initial glass during its heat-treatments at increasing and decreasing temperatures has been performed and accompanied by an XRD analysis and Raman spectroscopy. The initial glass was X-ray amorphous. Its optical spectrum is mainly formed by absorption of [5]Ni2+ sites with a small amount of [4]Ni2+ ones. Crystals of the nucleating catalyst, ZrTiO4, about 4 nm in size, appear during heat-treatment at 800 °C, while the absorption spectrum of Ni2+ ions remains near unchanged. At 850 °C, spinel crystals with size of about 6 nm precipitate, which is accompanied by a broadband luminescence in the near-IR centered at 1330 nm with a bandwidth of 380 nm. At 950 °C, there is a slight reduction in intensity of absorption bands attributed to [6]Ni2+, which can be explained by a tendency toward random Ni2+ site redistribution with increasing temperature. A decrease in the amount of the [6]Ni2+ luminescent centers is not accompanied by a decrease in the luminescence intensity because of the increased size of spinel crystals. Additional low-temperature heat-treatment does not lead to a redistribution between [6]Ni2+ and [4]Ni2+ sites in spinel crystals in favor of [6]Ni2+ ones. An increase of the luminescence intensity after low-temperature heat-treatment is associated with additional spinel crystallization. |
| تدمد: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.11.247 |
| DOI: | 10.1016/j.jallcom.2018.11.247⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4b12dd50847d4062d2cf2995d05a1a3 https://doi.org/10.1016/j.jallcom.2018.11.247 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....d4b12dd50847d4062d2cf2995d05a1a3 |
| قاعدة البيانات: | OpenAIRE |
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