Abstract
AbstractInitial investigations on the preparation of highly transparent Fe2+:MgAl2O4 ceramics using nanopowders synthesized in a laser plume were carried out. For the first time, dense Fe2+:MgAl2O4 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 Fe2+:MgAl2O4 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 cm2.
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