DOPING METHOD OF MgO-nAlO CERAMICS WITH IRON IONS Russian patent published in 2019 - IPC C04B35/443 C04B35/626 B22F9/12 B82Y40/00 

FIELD: physics.

SUBSTANCE: invention relates to the field of quantum electronics and can be used for synthesis of an active medium when creating powerful lasers generating in the medium infrared range of wavelengths. Method involves preparation of target from coarse powder of Fe₂O₃, MgO and Al₂O₃ in ratio required to obtain aluminum-magnesium spinel of required stoichiometry and level of doping with iron ions, target evaporation by laser radiation to obtain homogeneous nanopowder with average particle size of about 10–20 nm and subsequent calcination of compacted compacted from such powders. In this case doping of aluminum-magnesium spinel with iron ions takes place in two stages. At the first stage, during target evaporation with laser radiation, oxides vapor is mixed Fe₂O₃, MgO and Al₂O₃ in a laser flame. Mixing process is carried out at high temperature (from boiling point or decomposition to melting point), which predetermines high homogeneity of composition of particles. At the second step, upon calcination, the composition of nanopowders is finally imparted to the crystal structure of spinel Fe_2x:Mg_2-2xO-nAl₂O₃, where 2x is molar FeO content in MgO.

EFFECT: high uniformity of distribution, concentration and thickness of the active layer of Fe²⁺ ions in a ceramic matrix of MgO-nAl₂O₃, where n is molar content of Al₂O₃.

1 cl, 4 dwg