New optical ceramics: High-entropy sesquioxide X2O3 multi-wavelength emission phosphor transparent ceramics
| Autor: | Iva Milisavljevic, Piotr Stachowiak, Karina Grzeszkiewicz, Guangran Zhang, Yiquan Wu, Dariusz Hreniak |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Transparent ceramics Analytical chemistry Phosphor 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Sesquioxide visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites Transmittance visual_art.visual_art_medium Relative density Ceramic 0210 nano-technology Solid solution Visible spectrum |
| Zdroj: | Journal of the European Ceramic Society. 41:3621-3628 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2021.01.027 |
| Popis: | Highly transparent X2O3 sesquioxide ceramics were obtained from a solid solution of five different oxides (Lu2O3, Y2O3, Yb2O3, Gd2O3, and Dy2O3), mixed in an equal molar ratio according to the principle of high-entropy. The fabricated (Lu, Y, Yb, Gd, Dy)2O3 ceramics achieved 99.97 % of the relative density and exhibited a high degree of optical transparency with the in-line transmittance of almost 80 % in the visible wavelength range. Emissions of Gd3+ (6PJ → 8S7/2 at 312 nm), Dy3+ (4F9/2 → 6H15/2 at 492 nm and 4F9/2 → 6H13/2 at 572 nm), and Yb3+ (2F5/2 → 2F7/2 at 1031 nm) suggested a potential application of the high-entropy ceramics as multi-wavelength emission phosphor transparent ceramics. High-entropy ceramics also exhibited lower specific heat and thermal conductivity compared to single-element sesquioxide ceramics. This work demonstrated that highly transparent oxide ceramics, with complex chemical compositions and good optical properties, could be obtained using the high-entropy principle. |
| Databáze: | OpenAIRE |
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