One type of red fluorescent powder for white LED and its preparation method

摘要

The present invention discloses a white-light LED red phosphor and method of manufacturing the same. The chemical formula of the phosphor is Ca 1-y-m-e-r Y y M m X x-p P p Z z N n : Eu e , R r , wherein 0.001‰¤y‰¤0.2,0.001‰¤m‰¤0.2,0.5‰¤x,z‰¤1.5, 0.001‰¤p‰¤0.1,2‰¤n‰¤4,0.01‰¤e‰¤0.2,0.001‰¤r‰¤0.1, M is selected from at least one of Sr, Ba, Sc, Li, Na and K; X is selected from at least one of B, Al and Ga, wherein Al is must; Z is selected from Si, V, and Nb, wherein Si is must; R is selected from at least one of Dy, Er, Tm, and Lu, wherein Dy is must. The manufacturing method comprises: Weighing the raw materials according to the chemical formula components in the structural formula (1) and stoichiometric ratio; sealing tightly after mixing them in a protective atmosphere, and then performing segmented roasting in the protective atmosphere adopting the normal-pressure high-temperature solid-state method, finally obtaining the white-light LED red phosphor after post-processing. The phosphor according to the present invention has features such as good chemical stability, high luminous efficiency, and good anti- luminous attenuation performance, etc. Further, this manufacturing method is easy to operate, pollution-free, and low cost.