Some experts said that, by adopting ammonium metatungstate nanoparticles as a raw material, thermal insulation dispersion liquid with a molar ratio of Cs:W:F=0.33:1:0.05 can be prepared. And the prepared dispersion can be used to produce transparent heat insulation film for applying in architectural glass. Specifically, the steps are as follows:
More details, please visit:
http://www.ammonium-metatungstate.com/
Step one: 10g of ammonium metatungstate was prepared into a 30wt% aqueous solution and stirred uniformly to obtain a transparent liquid A. 0.053g of ammonium fluoride was added into the liquid A, stirred uniformly 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 liquid A' to obtain a transparent mixed liquid C. The liquid C was heated at 145°C to obtain a powdery product. The powder product was heated at 550°C for 20min under a reduced atmosphere of 10vol% hydrogen to obtain a heat insulating powder product P with a molar ratio of Cs:W:F=0.33:1:0.05. The powder product P was added to a toluene solvent to prepare a 1% solution, and a 40wt% polymer dispersant was added, and the nano dispersion D was obtained by grinding and dispersing with 2mm yttrium zirconium beads.
Step two: The dispersion D is combined with an acrylic resin to form a 30% coated 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.
