METHOD CREATING RED DMITTING LONG AFTER-GLOW DECAY PHOSPHORS

摘要

Conventional sulfide-based photoluminescent phosphors are difficult to apply to various processes, and use of the final product also has undesirable problems. In addition, Mn and Pb-activated calcium silicon oxide has a fluorescence property and no long afterglow property, but calcium titanium oxide which has regenerated Pr has a red long afterglow property but has a weak initial luminance.;Therefore, the present invention comprises the steps of adding and mixing the calcium compound, titanium compound, silicon compound and Pr as an activator; Adding boric acid (H ₃ BO ₃ ) as a flux to promote the reaction to the mixture; Adding the boric acid to the mixture, followed by primary and secondary firing in a reducing atmosphere and tertiary firing in an oxidizing atmosphere; And chemically bonding the activator to produce the chemical formula Ca _1-x Ti _1-y Si _y O ₃ : Pr _x , (0.00001 ≦ x ≦ 0.1, 0 ≦ y ≦ 0.8), which is a phosphor having long afterglow. It is characterized by providing a method for producing a red photoluminescent phosphor carried out as.