W18O49 is an important material for fabricating infrared-shielding film, to sufficiently transmit visible rays and shield invisible near-infrared rays. Some experts prepared W18O49 powder by heating a mixture containing a predetermined amount of a tungsten compound at 550 °C in a reductive atmosphere for 1 h, then cooled to room temperature once in an argon atmosphere.

Sputtered tungsten trioxide, more specifically, sputtered WO3 film, may be applied as a photoelectrode to obtain high solar-to-hydrogen efficiency. Some experts have prepared tungsten oxide film with a dense, compact morphology at a temperature lower than 250 °C by reactive sputtering from tungsten targets in an argon/oxygen ambient in the context of photoelectrochemical water-splitting.

It has been reported that amorphous tungsten oxide thin film has good optical absorption to shield near-infrared rays, thereby reducing room temperature in hot summer and saving powder rate for cooling the room by using air conditioners or fans. Some experts have investigated the electrochromic color centers of amorphous tungsten oxide thin film by the Raman scattering method.

It has been reported that some researchers prepared electrochromic tungsten trioxide film by spray pyrolysis under various conditions using tungsten chloride (WCl6) to dissolve in 50% ethanol–50% water. And it was found that all the as-deposited electrochromic tungsten trioxide films were amorphous and dark. When annealed, they became crystallized and transparent. In the preparation process, the researchers also studied the structure and the composition of these films, before and after annealing.