RED FLUORESCENT BODY OF STRONTIUM TITANIC ACID USED FOR LOW-VOLTAGE CONDITION AND MANUFACTURING METHOD THEREOF

摘要

PURPOSE: A red fluorescent body of strontium titanic acid(SrTiO3) used for low-voltage condition is provided which has an excellent color purity, stability even under the high vacuum pressure, and in particular high luminescence so as to be suitably used in a field emission displays(FEDs), by comprising praseodymium chloride as an activator and aluminium hydroxide or gallium oxide as a co-activator in a red fluorescent body having a strontium titanic acid as a parent body. CONSTITUTION: A red fluorescent body of strontium titanic acid is produced by: adding praseodymium chloride as an activator and aluminium hydroxide(Al(OH)3) or gallium oxide(Ga2O3) as a co-activator to strontium titanic acid, which comprises strontium carbonate and titanium dioxide as a fluorescent material; mixing and drying them well; and sintering the resulted mixture at 1000-1400 deg.C and grinding it. Thus produced fluorescent body having high luminescence is suitably used for a field emission displays operated by excitation with low voltage electric rays.