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Fabrication and characterization of IR ‐transparent Fe 2+ doped MgAl 2 O 4 ceramics

Initial investigations on the preparation of highly transparent Fe 2+ :MgAl 2 O 4 ceramics using nanopowders synthesized in a laser plume were carried out. For the first time, dense Fe 2+ :MgAl 2 O 4 ceramics with high transmission in the mid‐ IR range were fabricated at a temperature as low as 1300...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2019-08, Vol.102 (8), p.4757-4764
Main Authors: Osipov, Vladimir V., Shitov, Vladislav A., Maksimov, Roman N., Lukyashin, Konstantin E., Solomonov, Vladimir I., Ishchenko, Aleksey V.
Format: Article
Language:English
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Summary:Initial investigations on the preparation of highly transparent Fe 2+ :MgAl 2 O 4 ceramics using nanopowders synthesized in a laser plume were carried out. For the first time, dense Fe 2+ :MgAl 2 O 4 ceramics with high transmission in the mid‐ IR range were fabricated at a temperature as low as 1300°C and with a short sintering time (1 hour). The obtained Fe 2+ :MgAl 2 O 4 ceramics contain a secondary (MgO) 0.91 (FeO) 0.09 phase with a low wt% content, causing a substantial decrease in transmittance in the visible range. The transmittance increases with an increase in wavelength due to a decrease in Rayleigh scattering and reaches 85.6% at λ  = 4 μm, which is close to the theoretical value. The absorption cross section of divalent iron ions was estimated to be σ  = (1.66 ± 0.14) × 10 −20  cm 2 .
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.16333