METHOD OF PRODUCING OPTICALLY ACTIVE GLASS-CERAMIC BASED ON FLUORIDE GLASS DOPED WITH RARE EARTH COMPOUNDS Russian patent published in 2014 - IPC C04B35/553 C03B19/06 B82B3/00 

FIELD: chemistry.

SUBSTANCE: method involves adding nanopowder of a rare earth fluoride into a mixture - fluoride glass powder, mechanical mixing of the fluoride glass powder and the rare earth fluoride nanopowder while simultaneously grinding the fluoride glass to particle size of 0.1-0.5 mcm and pressing. The mixture is placed into a mould for pressing. The required pressure is applied, followed by heating to glass-transition temperature without reducing the pressure.

EFFECT: endowing fluoride glass with new properties via activation with rare earth fluorides.

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