Preparation method of cesium doped tungsten oxide nano powder serving as infrared barrier

Abstract

The invention discloses a preparation method of cesium doped tungsten oxide nano powder serving as an infrared barrier and belongs to the field of infrared barrier materials. The preparation method includes the steps of firstly, respectively dissolving raw material tungsten salt and cesium salt into solvents, and preparing the tungsten salt solution into a tungstic acid solution through exchange resin; secondly, mixing the tungstic acid solution, the cesium salt solution and a reaction solvent, and continuously stirring for 1-3 hours to obtain hydrothermal reaction precursor liquid; thirdly, performing stirring reaction on the precursor liquid for 5-20 hours under 180-300 DEG C; fourthly, washing, drying, crushing and calcining the hydrothermal reaction products to obtain the cesium doped tungsten oxide nano powder. The preparation method has the advantages that the prepared cesium doped tungsten oxide nano powder is good in stability, the ultraviolet rejection rate of the cesium doped tungsten oxide nano powder is larger than 99.8%, the visible light transmittance of the cesium doped tungsten oxide nano powder is 70-88%, and the infrared rejection rate of the cesium doped tungsten oxide nano powder is 94-99%; the preparation method is low in energy consumption, low in cost, easy to operate, good in environment protection performance and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a preparation method of cesium-doped tungsten oxide nanopowder as an infrared barrier, belonging to the field of infrared barrier materials. Background technique [0002] Infrared light has an obvious thermal effect, which can easily lead to an increase in the ambient temperature. Therefore, the surfaces of architectural glass, car film, outdoor facilities, etc. need to use thermal insulation materials to achieve the effect of thermal insulation and energy saving. In recent years, tungsten oxide has attracted widespread attention due to its excellent photoelectric properties, and tungsten oxide powder doped with cesium has strong absorption characteristics in the infrared region, and at the same time has a high transmittance of visible light, making it effective in blocking infrared, Glass insulation and other aspects have a wide range of application prospects. [0003] Cesium-doped tungsten oxide nanopowder prepared by tradit...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method of cesium-doped tungsten oxide nano-powder as an infrared barrier, which solves the problem of the infrared barrier rate of cesium-doped tungsten oxide nano-powder prepared by traditional methods. To further improve, tungsten chloride or cesium hydroxide are useful in some process raw materials, which have high cost, poor stability, and are very harmful to the environment.

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