Ammonium Metatungstate Nanoparticles Applied for Near Infrared Shielding Material

Ammonium metatungstate nanoparticles, or AMT nanoparticles, can be used as a raw material for the preparation of near infrared shielding material such as transparent architectural glass heat insulation film. For example, some experts have proposed a method of preparing a heat insulating material with a molar ratio of Cs:W:Br=0.33:1:0.05, and preparing a transparent heat insulating film from such raw material. The specific steps are as follows:

More details, please visit:
http://www.ammonium-metatungstate.com/

10g of ammonium metatungstate was prepared into a 30wt% aqueous solution, stirred uniformly to obtain a transparent liquid A. 0.13g of ammonium bromide was added into the transparent liquid A, and the mixture was uniformly stirred to obtain a transparent liquid A'. 2.2g of cesium carbonate was prepared into a 50wt% aqueous solution, 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 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:Br=0.33:1:0.05. The heat insulating 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. This dispersion D was prepared into 30wt% coating E with an acrylic resin. This coating E was applied onto the glass by wet coating, and after drying at 80°C for half an hour, a transparent heat-insulating film was obtained.

• < Prev
• Next >