
In recent years, as a highly sensitive material, Tungsten Trioxide (WO3) has many advantages, such as short response and recovery time, appropriate response temperature, and easy measurement and control. It can be used in the military of?national defense, and has attracted people’s concern. Gas sensing property means that when a certain gas (such as ethanol, methane, hydrogen.) is introduced, the color of the material changes reversibly. The greater the variation, the better the gas sensitivity. Tungsten Trioxide is such a…