Nano ammonium metatungstate has strong short-wave near-infrared absorption properties so that it can be used to prepare cesium tungsten bronze nanoparticles, and the obtained nano functional particles can be used to prepare a transparent thermal insulation paper for building glass. Experts said the obtained thin "paper" is actually a layer of thermal insulation film that inherits the characteristics of ammonium metatungstate. In other words, such film has an infrared shielding property that changes with changes in light intensity.

Nano ammonium metatungstate can be used as a raw material for preparing a heat insulating material with a molar ratio of Cs:W:Cl=0.33:1:0.05, and a new environmentally-friendly thermal insulation film is prepared by using the thermal insulating material as raw material. Specifically, the preparation processes are as follows :

Nano ammonium metatungstate is an indirect raw material for preparing ceramic microsphere. Ammonium metatungstate is used to prepare cesium tungsten bronze nanoparticles, and the obtained cesium tungsten bronze is the direct raw material for producing thermal insulating ceramic particles. In any case, these new heat insulation particles will be used to prepare building heat insulation films. One of the important raw materials, cesium tungsten bronze nanoparticles, that is, cesium tungsten bronze nanopowder. So, what are the chemical preparation methods for nanopowder?

Nano ammonium metatungstate is a raw material for preparing thermal insulation masterbatch of nano cesium tungsten bronze particles. Specifically, cesium tungsten bronze nanoparticles are prepared using ammonium metatungstate and cesium carbonate as raw materials. And then the obtained nano functional particles of cesium tungsten bronze are used to prepare masterbatch. And finally these blue heat insulating particles are applied to prepare building thermal insulation film.