
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 : Step one: Preparation of heat insulation material powder. 10g of ammonium metatungstate was prepared into a 30wt% aqueous solution and stirred uniformly to obtain a transparent liquid A. 0.1g of ammonium chloride…