Ammonium metatungstate nanoparticles can be used to prepare cesium tungsten bronze nanoparticles, and then be used to produce transparent heat insulation materials such as window heat insulation film for applying in architectural glass. According to experts, this new type of thermal insulation film avoids the following problems of common building heat insulation films:
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The heat-insulating film used in general architectural glass is made of multi-layered tough polyester film by many processes including dyeing, ultraviolet absorber injection, metallized magnetron sputtering, multi-layer compounding and glue coating. Also, its preparation process is complicated. While this new type of building heat insulation film is directly attached to the surface of the glass, effectively blocking the heat of the sun, controlling the temperature rise in the hot summer, thereby reducing the air conditioning load, improving the indoor temperature and the air conditioning cost. So, the experts said that cesium tungsten bronze is a promising heat insulating material.
