Synthesis and Investigation of Magnesium–Aluminum Nanopowders and Ceramics Activated by Copper
| Autor: | Vladislav A. Shitov, A. V. Podkin, Vladimir V. Osipov, A. S. Korsakov, V. I. Solomonov, E. V. Tikhonov |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Cuprite Materials science Physics and Astronomy (miscellaneous) Magnesium Spinel Analytical chemistry chemistry.chemical_element engineering.material 01 natural sciences Copper 010305 fluids & plasmas Octahedron chemistry Aluminium visual_art 0103 physical sciences visual_art.visual_art_medium engineering Ceramic Absorption (logic) |
| Zdroj: | Technical Physics. 66:149-154 |
| ISSN: | 1090-6525 1063-7842 |
| DOI: | 10.1134/s1063784221010151 |
| Popis: | Nanopowders of two crystalline phases, magnesium–aluminum spinel (98 wt %), and cuprite (2 wt %) have been obtained by laser evaporation of a solid target, which is a mechanical mixture of simple oxides (MgO, Al2O3, CuO). These nanopowders have been used to prepare test samples of transparent Cu:MgAl2O4 ceramics, the IR transmission spectra of which revealed two new strong absorption bands at λ1 ≈ 1.55 (1.45) μm and λ2 ≈ 3.45 (3.03) μm, corresponding to transitions between the Stark levels 2E( $${\text{t}}_{2}^{6}$$ e3) and 2T2 ( $${\text{t}}_{2}^{5}$$ e4) of Cu2+ ions in octahedral and tetrahedral positions, respectively. |
| Databáze: | OpenAIRE |
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