Influence of humidity on parameters of gold doped tungsten trioxide

A preparation method of gold doped tungsten trioxide using silicotungstic acid and chloroauric acid is shown in this work. The microstructure of this gas sensing material was investigated under a scanning electron microscope. Electrical parameters of the material were study in a width range of temperatures and humidity. The obtained results reveal, that the humidity can both increase and decrease the conductivity of the sensing material. The direction of the changes depend on the dominant effect occurring at the material.