PROCESS FOR PREPARING RED HEAT OXYSULFIDE LUMINOPHORE Russian patent published in 1995 - IPC

FIELD: color television. SUBSTANCE: oxides of eropeum activator and terbium and praseodium coactivators are premixed, this mixture is stirred with yttrium oxide at a Y to Eu oxide weight ratio of 100:4-6 and at a mean diameter ratio thereof 2:1-1.5. An alkali metal carbonate mineralizer and sulfur are added to the mixture and the whole is calcined at 1050-1150 C for 3-4 hours. EFFECT: more efficient preparation process. 1 tbl