Pink NIR pigment based on Cr-doped SrSnO3
| Autor: | Žaneta Dohnalová, Petra Šulcová, Petr Bělina |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 010406 physical chemistry 0104 chemical sciences Ceramic glaze law.invention chemistry law Chemical stability Calcination Physical and Theoretical Chemistry Absorption (chemistry) 0210 nano-technology Thermal analysis Tin Perovskite (structure) Solid solution |
| Zdroj: | Journal of Thermal Analysis and Calorimetry. 138:4475-4484 |
| ISSN: | 1588-2926 1388-6150 |
| DOI: | 10.1007/s10973-019-08522-z |
| Popis: | Perovskite pigments with SrCrxSn1−xO3−δ (x = 0.025, 0.05, 0.1, 0.2, 0.3) composition were prepared by a solid-state reaction, suspension mixing of materials and mechanochemical activation of initial reagents with calcination at high temperature. Results of thermal analysis show the effectivity of mechanochemical activation of reaction mixture that shifts the reaction course to lower temperature. Solid solution of SrSn0.975Cr0.025O3−δ was prepared at temperature 1200 °C. The optimal composition for synthesis of the intense red–pink powder is SrSn0.975Cr0.025O3−δ (L*/a*/b* = 36.34/14.21./1.12). Red–pink colour of the pigments is explained in terms of crystal field theory. The partial substitution of tin ions by chromium ions leads to the formation of the optical absorption bands corresponding to the O2p–Cr3d charge transfer transitions. Pigment is distinguished by good chemical stability in a molten ceramic glaze and high value of solar reflectance in the near-infrared region of light (R* ≈ 61%). |
| Databáze: | OpenAIRE |
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