Influence of Fe2O3 on the structure and near-infrared emissivity of aluminosilicate glass coatings
| Autor: | Nilo Cornejo, Abdelaziz Gahmousse, Aitana Tamayo, Juan Rubio, Kouider Ferria |
|---|---|
| Přispěvatelé: | Ministry of Higher Education and Scientific Research (Algeria), Ministerio de Economía y Competitividad (España), Ferria, Kouider [0000-0001-7817-6522], Rubio Alonso, Juan [0000-0002-4835-126X], Tamayo Hernando, Aitana [0000-0002-9828-3461], Ferria, Kouider, Rubio Alonso, Juan, Tamayo Hernando, Aitana |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Analytical chemistry 02 engineering and technology engineering.material 01 natural sciences law.invention chemistry.chemical_compound Coating law Aluminosilicate 0103 physical sciences Near-infrared emissivity Emissivity General Materials Science Crystallization Fourier transform infrared spectroscopy Microstructure Magnetite 010302 applied physics Glass coating Structure General Chemistry Hematite 021001 nanoscience & nanotechnology chemistry visual_art visual_art.visual_art_medium engineering Fe2O3 0210 nano-technology |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1432-0630 0947-8396 |
| Popis: | The present paper reports on the development of a vitreous material with high near-infrared (NIR) emissivity. Silica-based glasses (SiO, NaO, AlO, KO) with different FeO (hematite) contents are deposited on ceramic tiles as coatings and annealed at 1250 °C. Using the indirect radiometric measurement method, the emissivity of the materials was determined at room temperature, where the spectral directional reflectance of the coatings was measured. The samples possessing high emissivity values of 0.78–0.80 in the near-infrared are those with the highest FeO contents. Colorimetric test (L*a*b*), has revealed that the glass coating goes darker red by adding more amount of FeO. XRD analysis has shown the magnetite, hematite, and nepheline crystallization phases in the glasses with FeO contents above 30 wt%. Readable aspects of FTIR absorbance spectra were found, which gave information about the structure variations of these glasses as a function of FeO content, also, SEM photographs displayed morphology of the prepared glass coatings. The present work was supported by the Algerian Ministry of Higher Education and Scientific Research (Algerian program P.N.E 2019–2020 scholarship fund) and by project MAT2016-78700-R financed by Spanish Research Agency and European Regional Development Fund (AEI/FEDER, UE). |
| Databáze: | OpenAIRE |
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