YTTRIUM OXYSULPHIDE-BASED MULTIFUNCTIONAL ANTI-STOKES LUMINOPHOR WITH LONG AFTERGLOW

摘要

FIELD: chemistry.;SUBSTANCE: invention can be used in production of inorganic yttrium oxysulphide-based multifunctional anti-Stokes luminophors which can be used for converting infrared radiation to visible luminescence, for protecting bond paper and documents, strict accounting forms, conformity marks of goods and articles, excise and identification marks, banknotes, as well as for making emergency and signal light systems, evacuation, fire, warning and indicator light marks, for pointers in shafts, tunnels, overpasses, metro and passages for information-direction boards in motorways and decorative cosmetics. The yttrium oxysulphide-based luminophor is activated by titanium ions and coactivated by magnesium ions, and also contains a cationic sublattice of trivalent ytterbium and erbium ions and has a chemical composition corresponding to the following empirical formula: (Y_1-X-YYb_xEr_y)₂0₂S:Ti_0.12,Mg_0.04, where 0.01X0.05; 0.01Y0.05.;EFFECT: more intense visible anti-Stokes luminescence during excitation of infrared radiation in the 0,90-0,98 mcm range.;7 cl, 1 tbl, 4 dwg