A preparation method of cesium doped tungsten oxide nanopowder for transparent thermal insulation material, including the following steps:

Cesium doped tungsten oxide nanopowder, also known as cesium tungsten bronze nanopowder, is becoming one of a potential transparent heat shielding material --- transparent thermal insulation nanopowder. It is non-toxic and environmentally friendly. And the manufacturing cost is not very high. So, it is more and more widely applied to the field of building and automotive glass.

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It is well accepted that cesium doped tungsten oxide is a typical tungsten bronze material with wonderful near infrared shielding performance, but recent theoretical calculated results have indicated that alkali metal-codoped tungsten oxide would have better infrared barrier properties. And experts have successfully synthesized the monodoped and codoped-WO3 by one-step solvothermal method with tungstate acid as the tungsten source, and CsCl, RbCl as cesium source and Rb source, respectively. The samples were characterized by UV-VIS-NIR transmittance spectroscopy, X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. And it was found that the products were no impure phase and showed good crystallinity, irregularly agglomerated with diameters of 20-100nm, well dispersed.

Cesium doped tungsten oxide powder may be applied for preparing thermal insulating coating and therefore be sprayed onto a window glass to obtain heat insulating window glass. And the prepared window glass has the following advantages:

Cesium doped tungsten oxide powder may be applied for producing a kind of environmentally friendly material - thermal insulation dispersion liquid. And the prepared dispersion liquid exhibits a clear blue-black liquid, which can be added directly to the formulation. In other words, it can be directly dispersed into the corresponding solvent system.

Cesium doped tungsten oxide powder may be applied for producing near infrared shielding material. The material obtained is a new type of transparent environmentally friendly heat insulation material.

Cesium doped tungsten oxide powder may be applied for producing a high performance thermal insulation medium - infrared thermal insulation nano material. So, how to prepare such a material with high thermal insulation property?

Cesium doped tungsten oxide powder may be applied for producing infrared ultraviolet shielding material, which is a kind of window film heat insulation media. As you may have known, at present, window film heat insulation media produced at home and abroad mainly adopt nano powder or nano coating as raw materials, such as, cesium doped tungsten oxide, ATO, ITO, and so on.

Cesium doped tungsten oxide powder may be applied for preparing transparent thermal insulation material, which is more and more widely used in building glass. For example, after the cesium doped tungsten oxide nanopowder is sufficiently ground and ultrasonically dispersed in a citric acid solution (of different concentration), it is added to a 0.1g/mL PVA solution, and then stirred in a water bath at 79°C for 0.5h to precipitate 1-2 days to obtain the material to be coated.

Cesium doped tungsten oxide powder can be said to be a type of transparent thermal insulation nanopowder. In fact, the powder itself is dark blue, but the products made from nano particle size cesium doped tungsten oxide, such as, thermal insulation film, thermal insulation coating and thermal insulation dispersion, are all transparent with high transparency. As nano grain size cesium doped tungsten oxide itself is environmentally friendly, these prepared heat insulation materials are all new environmentally friendly materials.

Nano cesium doped tungsten oxide may be applied to prepare heat insulating film for applying in heat insulating window glass. Among them, the nano thermal insulation material of cesium doped tungsten oxide is a type of nano inorganic material, which is also a new type of environmentally friendly thermal insulation material.