FIELD: manufacture of luminescent materials. SUBSTANCE: luminophore solid is premixed together with solution of potassium silicate in such amount that would be sufficient to apply to luminophore surface 0.01-0.1 % by weight of silicon dioxide. Thereafter, isopropanol or 1% aqueous solution of strontium/barium nitrate to the resulting mixture, and the resulting suspension is treated with chlorosilane in the amount of 0.005-0.1 % by weight based on luminophore material, with 1 % alcoholic solution of dimethyl- or diphenyldichlorosilane used for treatment of such suspension. EFFECT: increased efficiency. 1 cl
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