Synthesis and Investigation of Magnesium–Aluminum Nanopowders and Ceramics Activated by Copper
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, Al 2 O 3 , CuO). These nanopowders have been used to prepare test samples of transparent Cu...
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| Veröffentlicht in: | Technical physics 2021, Vol.66 (1), p.149-154 |
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| Hauptverfasser: | , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | 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, Al
2
O
3
, CuO). These nanopowders have been used to prepare test samples of transparent Cu:MgAl
2
O
4
ceramics, the IR transmission spectra of which revealed two new strong absorption bands at λ
1
≈ 1.55 (1.45) μm and λ
2
≈ 3.45 (3.03) μm, corresponding to transitions between the Stark levels
2
E(
e
3
) and
2
T
2
(
e
4
) of Cu
2+
ions in octahedral and tetrahedral positions, respectively. |
|---|---|
| ISSN: | 1063-7842 1090-6525 |
| DOI: | 10.1134/S1063784221010151 |