Tungsten Trioxide Gas Sensor

Tungsten trioxide has a discoloration effect. Tungsten oxide thin film in the color state of darker, the visible and infrared light in the sun has a strong absorption, can sooth the greenhouse effect, reducing the summer to reduce the power consumption for cooling. Tungsten trioxide also has an aerochromic effect. In terms of gas sensing, tungsten oxide gas sensors are widely used for the detection of flammable gases.

Tungsten trioxide gas sensor generally has a double-layer structure, and its structure includes a catalyst layer and a color changing layer. Tungsten trioxide gas sensor structure without architecture circuit structure, with a simple process, good repeatability and so on.

Precious metal surface modification of tungsten trioxide gas sensor with better technology, film adsorption and other advantages. The semiconducting material modifies precious metal surfaces in low temperature environments, which exhibit good gas sensing properties. It has high sensitivity to the surface of the adsorption of oxidizing and meta-gases, tungsten trioxide gas sensor has been considered to detect hydrogen, hydrogen sulfide, ethanol and other reducing gases, one of the most potential sensitive materials.

To increase the specific surface area of the sensitive material, it is necessary to prepare a tungsten oxide having a linear, tubular, dendritic and other nanostructures. However, the production of tungsten trioxide gas sensor instability, loose structure and other elements, leading to its production of the sensor yield is low, the impact of environmental external force greater electrical stability is not high.

• < Prev
• Next >