Na4-3xEux(WO4)2-y(MoO4)y serial fluorescent microcrystal and chemical solution preparation method

Abstract

The invention relates to research of a novel composite tungsten molybdenate phosphor, and especially relates to a novel fluorescent microcrystal prepared by a chemical solution method. The microcrystal provided by the invention can be expressed by a general formula of Na4-3xEux(WO4)2-y(MoO4)y, wherein 0<x<4 / 3 and 0<y<2. The preparation method comprises the following steps: according to a molar ratio of raw materials required for the preparation of a certain amount of Na4-3xEux(WO4)2-y(MoO4)y, measuring corresponding volumes of Na2MoO4 and Na2WO4 solutions in a polytetrafluoroethylene beaker, respectively adding a corresponding amount of EuCl3 solution, stirring at normal temperature for 15-30 min, adjusting the pH to 6-9, and finally putting the polytetrafluoroethylene beaker into a high pressure reaction vessel; performing a hydrothermal reaction at 80-160 DEG C for 15-30 hours, naturally cooling to room temperature; centrifuging the precipitates for separation, washing with deionized water, and drying at 100-150 DEG C to obtain the Na4-3xEux(WO4)2-y(MoO4)y microcrystal. The preparation method of the invention is simple in preparation process, low in reaction temperature. The prepared tungsten molybdenate fluorescent microcrystal is pure in phase, uniform in granularity, appropriate in particle size, and regular in morphology, can exhibit red light with high purity and brightness, and has good practicality.

Description

technical field [0001] The invention relates to the research of a novel composite tungstomolybdate phosphor, in particular to the preparation of the novel fluorescent microcrystal by a chemical solution method. Background technique The unique 4f electron layer structure and rich energy levels of rare earth elements make them have spectral properties unmatched by general elements, and provide many luminescent materials and laser materials with superior performance for the national economy and high-tech. Rare earth luminescent materials have the advantages of strong absorption capacity, high conversion rate, can emit spectrum from ultraviolet to infrared, strong emission ability in the visible region, stable physical properties, etc., so they are widely used in lighting sources, color TVs, medical equipment, industrial transportation It has extremely important and extensive applications in many fields such as aviation, aerospace, national defense and military affairs. Whit...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to use a chemical solution method, that is, a hydrothermal synthesis method, to prepare a new type of tungstomolybdate solid solution fluorescent microcrystal, so as to solve the above-mentioned problems existing in existing phosphors

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