PHOTOLUMINOPHORE OF LONG-PERSISTENCE Russian patent published in 2002 - IPC

FIELD: chemical industry. SUBSTANCE: photoluminophore corresponds to the general formula: Me_1-x-y Mn_xEu_y(Al_1-q-z Y_qLn_z)₂ O₄ where Ln means Nd and/or Dy; Me means the combination Sr-Mg and Ca-Mg, 0.001 <x ≤ 0.002; 0.01 <y ≤ 0.05; 0.005 <z ≤ 0.05; 0.005g ≤ 0.05; ratio y/( x + z ) = from 1:2 to 2: 1. [MgCO₃]/[SrCO₃] = g and [MgCO₃]/[CuCO₃] = g. Photoluminophore shows long-persistence property up to 48 h and enhanced long-persistence brightness for the first 10-30 min after light effect ceasing. Invention can be used in making sources of emergency autonomic illumination, fencings, illuminating, indicators, device scales, road signs. EFFECT: valuable properties of photoluminophore. 2 cl