Influence of flux on morphological and luminescent properties of Y_3Al_5O_(12):Tb~(3+) phosphor

摘要

The Y_3Al_5O_(12): Tb~(3+) phosphors are synthesized by solid-state reaction method using fluxes of LiF, NaF, MgF_2, AlF_3, CaF_2, SrF_3, KH_2PO_4 and complex fluxes of LiF+AlF_3, KH_2PO_4+LiF separately. The influence of fluxes on phosphors morphology and luminescent properties are investigated by SEM, HITACHI F-450 photometer and cathodoluminescent photometer. The results indicate that KH_2PO_4 can improve the morphology characteristics of the phosphors, but LiF, A1F_3, NaF, MgF_2, SrF_3, CaF_2 are unavailable. LiF, NaF, AlF3, KH_2PO_4 can improve the phosphors photoluminescent intensity more than 20 percent and cathodoluminescent intensity more than 10 percent. Using KH_2PO_4 as flux, excellent luminescent properties and well dispersed ～2 μm spherical or sub-spherical YAG: Tb~(3+) phosphors can be synthesized under 1500°C.