Spectroscopic Investigation of γ-LiAlO_2 Ceramic Doped with Tetrahedrally Coordinated Cr~(3+) Ions

摘要

The γ-LiAlO_2: Cr~(3+) ceramics were successfully fabricated using multi-mode cavity microwave furnace, and the sample's absorption spectrum was measured at room temperature. There are five bands in the red and near-infrared region. Using the crystal-field theory and introducing the average covalent factor model, we calculated the energy-level splitting of Cr~(3+) ions in γ-LiAlO_2 and successfully explained these bands. These calculation results are in good agreement with the optical experiment data.