Abstract
This work presents the investigation of nanopowders from magnesium aluminum spinel doped with Cr3+. Different synthesis conditions were used to determine the influence on lattice parameter. The following synthesis parameters varied: time of calcination, cold pressing and alternative precursor of Cr3+. The nanopowders properties were measured by XRD, optical transmission and EDX spectroscopy. The determined average size of synthesized nanoparticles is around 70 nm. Ceramic samples are given by hot pressing and studied by transmission spectroscopy and luminescent spectroscopy. The excitation and emission spectra demonstrates 2E - 4A2 (687 nm), 4A2 - 4T1 (400 nm) and 4A2 - 4T2 (532 nm) transitions.
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