Ultraviolet excitated red fluorescent powder surface treating method

Abstract

The invention relates to a surface disposal method of an ultraviolet excitation red fluorescent powder, belonging to the field of inorganic synthesis technique of optical function material. The method comprises the steps as follows: the surfactant raw material is screened by a screen of 400 meshes and ball-grinded; subsequently, the consistency of the solution is adjusted and the solution is mixed to gain the surfactant; subsequently, according to the mass percentage in occupation to yttrium europium oxide, 0.005-0.05 percent of surfactant is added into the red fluorescent powder of the yttrium europium oxide; under a mixing state, the surfactant and the red fluorescent powder of the yttrium europium oxide are mixed; the mixture is dehydrated, dried and screened, thus gaining the red fluorescent powder of the yttrium europium oxide with the surface disposed, wherein, according to the mass percentage, the surfactant is one of 5-20 percent Gama-Al2O3 solution, yttrium oxide, potassium silicate, zinc silicate or zinc sulfate. The surface disposal method can prepare the commercial red fluorescent powders which has good powder fluidity, good coating performance, good dispersion performance and good luminescence. The prepared red fluorescent powder of the yttrium europium oxide has the advantages of good fluidity, good coating performance, good dispersion performance and good luminescence.

Description

1. Technical field [0001] The invention belongs to the technical field of inorganic synthesis of optical functional materials, and in particular relates to a surface treatment method for ultraviolet-excited red fluorescent powder. 2. Background technology [0002] Yttrium europium oxide red phosphor is an important red luminescent material. In the mid-1960s, it was found that yttrium oxide doped with europium can emit red fluorescence with narrow spectral lines under the excitation of cathode rays, with high brightness and bright colors. Yttrium europium red phosphor is especially suitable for red phosphor in cathode ray color picture tubes. Commonly used yttrium europium oxide red phosphors are synthesized by high-temperature solid-phase synthesis, melt-gel method, combustion synthesis and microwave synthesis. and other methods. At present, the high-temperature solid-phase synthesis method is the most widely used because of its simple equipment, stable production process, ...

AI Technical Summary

Problems solved by technology

At present, the commercial yttrium and europium oxide generally exist in the coating process, the quality of the coating film is not good, and the coating is not uniform enough, so the light efficiency is not high during the lighting process, and the light decay is large.