Abstract
Transparent glass-ceramics based on nanocrystals of magnesium aluminate and zinc aluminate spinels doped with iron ions have been obtained for the first time to our knowledge. The materials are promising for middle-IR spectral range laser technology. These materials are synthesized by heat-treating glasses of special composition in the temperature range of 720∘C−1050∘C . The glasses and glass-ceramics are studied by X-ray diffraction analysis and Raman and optical absorption spectroscopy. Their densities are measured, and differential scanning calorimetry data are obtained. It is shown that iron ions in glass-ceramics enter into tetrahedral and octahedral sites of crystals with a spinel structure. Increasing the heat-treatment temperature increases the absorption in the 2µm region originating from the 5E→5T2(5D) transition of Fe2+ ions in tetrahedral sites in spinel crystals.
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