PHOSPHOR SUSPENSION FOR GAS-DISCHARGE LIGHT SOURCES Russian patent published in 1995 - IPC

FIELD: manufacture of fluorescent lamps. SUBSTANCE: phosphor suspension for gas-discharge light sources that has phosphor incorporating yttrium oxide, activated europium, lanthanum-yttrium orthophosphate activated by cerium and terbium, strontium-barium chlorphosphate activated by europium, binder, and fixing agent in its composition uses varnish based on water-alkali solution of methyl methacrylate and metacrylic acid copolymer as binder and phosphor is taken in following proportion of ingredients, mass percent: yttrium oxide activated by europium - 35-55; lanthanum-yttrium orthophosphate activated by cerium and terbium 36-56, strontium-barium chlorphosphate activated by europium 4-14. EFFECT: improved composition. 2 tbl