Micro/nano potassium yttrium tungstate near-spherical particles and preparation method thereof

Abstract

The invention discloses micro / nano potassium yttrium tungstate near-spherical particles and a preparation method thereof. The preparation method comprises the following steps: regulating the pH value of a soluble tungstate solution to 7-8.5 and the pH value of Y<3+> of the yttrium ion solution to 5-6.5, mixing according to the tungstate ion:yttrium ion mol ratio of 2:1, regulating the pH value of the mixed solution to 5-7.5, uniformly stirring, adding acetylacetone accounting for 10-20 vol% of the mixed solution, and carrying out ultrasonic vibration to obtain a precursor solution; holding the precursor solution by hydrothermal sealing to obtain a white precipitate, wherein the hydrothermal temperature is 140-180 DEG C, and the holding time is 20-24 hours; and centrifuging the white precipitate, and carrying out heat treatment to obtain the micro / nano potassium yttrium tungstate near-spherical particles. The micro / nano potassium yttrium tungstate near-spherical particles are composed of KY(WO4)2 particles, the particle size is 0.100-1 mu m, and the particle shape is near-spherical. The invention enhances the luminescence efficiency of the powder, can be used as a luminescent material, and can be widely used in the fields of road signs, various energy-saving illuminators, biomedical labels, aviation display devices, various meters and computers, and the like.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to an inorganic luminescent material compound tungstate and a preparation method thereof. Background technique [0002] The traditional preparation method of phosphorescent materials is a high-temperature solid-phase method. The traditional preparation method usually requires high temperature or complex equipment, and the reaction time is relatively long. With the rapid update of new technologies, the improvement of the performance indicators of phosphorescent materials needs to overcome the classic synthesis method. Due to the inherent defects, some new methods have emerged, such as combustion method, sol-gel method, hydrothermal precipitation method, microwave method and so on. But different methods have their own limitations, such as the disadvantages of the combustion method: the reaction is uncontrollable, and the powder collection is difficult; the raw materials ...

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Problems solved by technology

But different methods have their own limitations, such as the disadvantages of the combustion method: the reaction is uncontrollable, and the powder collection is difficult; the raw materials used in the sol-gel method are relatively expensive, and some raw materials are organic matter, which is harmful to health. Secondly, the entire sol - The gel process takes a long time; the most obvious defect of the hydrothermal method is: the scope of application is limited to the preparation and treatment of oxide materials or a small number of sulfides that are not very sensitive to water, and some easily hydrolyzed compounds are not suitable. small range

[0005] At present, people's reports on yttrium potassium tungstate mainly focus on the growth of bulk single crystals, spectral properties, and optical waveguide characteristics. Patent reports involve the preparation of tungstate single crystals (02802513.X), tungstate nano The preparation of thin films (200810032456.0, 200510026632.6), the luminescence of tungstate (200910067493.X, 200910067492.5, 200910114933.2, etc.), and the research on the low-dimensional nanoscale and shape control of compound tungstate and the synthesis process of micro-nano structure materials Research less involved

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