elib (German Aerospace Center) · 1992 · 24 citations · 0 references
Materials ScienceSpectroscopic PropertyEngineeringCr-doped MulliteCrystal MaterialOptical PropertiesSpectroscopyCrystal-field SpectraApplied PhysicsNatural SciencesLuminescent GlassMullite PowdersChemistryCrystal FormationCrystallographyCrystal Structure DesignMullite Sample
Unpolarized crystal-field spectra were measured in the wavelength range of 340 to 1540nm by reflection from mullite powders. The mullite sample contained 8.1wt% Cr 2 O 3 and was synthesized by reaction sintering from Al 2 O 3 , SiO 2 and Cr 2 O 3 powders. The spectra were converted to wavenumber scale and were interpreted by curve fittings, applying Gaussian functions