METHOD FOR PRODUCING LUMINOPHORE WITH LONG AFTERGLOW Russian patent published in 2017 - IPC C09K11/55 C09K11/78 C09K11/80 

FIELD: chemistry.

SUBSTANCE: reaction mixture is prepared by mechanical stirring powders of strontium peroxide, dysprosium (III) oxide, europium (III) oxide, aluminium oxide and aluminium metal in a planetary mill for 20 minutes. Then, the exothermic reaction of the components of the produced reaction mixture is carried out in the regime of self-propagating high-temperature synthesis in an open reactor in the air atmosphere. The produced luminophore with a long afterglow has the general formula Sr_1-x-yEu_xDy_yAl₂O₄, where 0.01≤x≤0.05 are a single-phase product.

EFFECT: need to use inert atmosphere and complex equipment is eliminated.

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