Tungsten trioxide for preparing dining room thermal insulating film is often doping an element to produce a tungsten bronze structure, which in turn exhibits broadband near-infrared (NIR) absorption properties. And the developed general structure of tungsten bronze materials is MxWO3, where M = Cs, Rb, K, Na, and NH4.

Tungsten trioxide, or WO3, is a near-infrared absorbing photothermal material, which is also known as NIR-absorbing photothermal material or PTM. And it is reported that tungsten trioxide nano particles may be applied for preparing hotel thermal insulating film.

Tungsten trioxide for exhibition hall thermal insulating film is WO3 doping with an element. That is MxWO3, which further enhances the optical absorption of tungsten trioxide powder in the solar spectrum. MxWO3, such as CsxWO3, has attracted considerable attention because it offers a wide variety of crystal structures and has many interesting attributes such as electrochromic, optical-electrical, and superconductive properties.

Tungsten trioxide, or WO3, is a main functional material for preparing windshield thermal insulating film. There are a few methods for the preparation of tungsten trioxide powder such as electrochemical processes, solution-based colloidal approaches, bioligation processes and chemical vapor deposition techniques.