Ammonium Metatungstate Powder Applied for Thermal Insulation Dispersion Liquid

Some experts use ammonium metatungstate powder and cesium carbonate as the main raw materials to produce heat insulation materials with a molar ratio of Cs:W:Cl=0.33:1:0.30, and use this material to prepare thermal insulation dispersion liquid. Finally, they adopt the dispersion liquid to manufacture transparent heat insulation film, the specific steps are as follows:

Step one: 10g of ammonium metatungstate was formulated into a 30wt% aqueous solution and stirred uniformly to obtain a transparent liquid A. Weigh 0.66g of ammonium chloride, transparent liquid A was added, and the mixture was uniformly stirred to obtain a transparent liquid A'. 2.2g of cesium carbonate was prepared into a 50wt% aqueous solution and stirred uniformly to obtain a transparent liquid B. Further, the liquid B was gradually dropped into the liquid A' while maintaining the stirring of the liquid A' to obtain a transparent mixed liquid C. The mixed liquid C was heated at 145°C to obtain a powdery product. The powder was heated at 550°C for 20 minutes in a 10vol% hydrogen reduction atmosphere to obtain a thermal insulation powder product P with a molar ratio of Cs:W:Cl=0.33:1:0.30.

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Step two: add the thermal insulation powder product P to the toluene solvent to prepare a 1% solution, a 40% polymer dispersant was added, grinding and dispersing with 2mm yttrium zirconium beads to obtain nano dispersion Liquid D. This dispersion D was combined with an acrylic resin to form a 30wt% coating E. This coating E was applied onto the glass by a wet coating method, and dried at 80°C for half an hour to obtain a transparent heat-insulating film. The obtained thermal insulation film is a new type of environmentally friendly inorganic thermal insulation film.

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