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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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Published in: | Journal of the American Ceramic Society 2019-08, Vol.102 (8), p.4757-4764 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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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
. |
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ISSN: | 0002-7820 1551-2916 |
DOI: | 10.1111/jace.16333 |