NaEu(MoO4)2-x(WO4)x-type fluorescent microcrystals and chemical solution preparation method thereof

Abstract

The invention belongs to the field of scheelite-structure luminescent materials, relates to a research on novel composite tungsten molybdate phosphors which are NaEu(MoO4)2-x(WO4)x-type fluorescent microcrystals, and especially relates to a chemical solution preparation method of the NaEu(MoO4)2-x(WO4)x-type fluorescent microcrystals. The NaEu(MoO4)2-x(WO4)x-type fluorescent microcrystals have a general formula of NaEu(MoO4)2-x(WO4)x, wherein x is greater than or equal to 0 and less than or equal to 2. The chemical solution preparation method comprises the following steps of weighing Na2MoO4 and Na2WO4 solutions having corresponding volumes according to a mole ratio of all raw materials for preparation of a certain amount of the NaEu(MoO4)2-x(WO4)x-type fluorescent microcrystals as a target system, putting the weighed Na2MoO4 and Na2WO4 solutions into a Teflon beaker with a stirrer, respectively adding a corresponding amount of an EuCL3 solution into the Teflon beaker, stirring at a normal temperature for 15 to 30 minutes, adjusting a pH value to 6-9, putting the Teflon beaker into a high-pressure reactor, carrying out a hydrothermal reaction process at a temperature of 80 to 160 DEG C for 15 to 30 hours, naturally cooling to a room temperature, carrying out centrifugal separation of precipitates, washing by deionized water, and drying at a temperature of 100 to 150 DEG C to obtain the NaEu(MoO4)2-x(WO4)x-type fluorescent microcrystals. The chemical solution preparation method adopts simple process equipment and allows a low reaction temperature. Rare earth-doped tungsten molybdate fluorescent microcrystals obtained by the chemical solution preparation method have a pure phase, a uniform and appropriate particle size and regular morphology, can emit high purity and high brightness red light, and have good practicality.

Description

technical field [0001] The invention belongs to scheelite-structure luminescent materials, and 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. [0002] Background technique [0002] Rare earth elements have a unique 4f electron layer structure and abundant energy levels, which make them have spectral properties unmatched by general elements, making them a huge luminescent treasure house, providing many luminescent materials and lasers with superior performance for the national economy and high-tech Material. Rare earth luminescent materials have the advantages of strong absorption, high conversion rate, emission from ultraviolet to infrared, strong emission in the visible region, and stable physical properties. Therefore, they are widely used in lighting sources, color TVs, computers, modern communications, There are extremely important and extensi...

AI Technical Summary

Problems solved by technology

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

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