Abstract
The effects of simultaneous addition of Al2O3 and Li2O upon the sensor properties of porous zinc oxide sintered bodies have been investigated by resistivity measurements with various surrounding gas atmosphere and scanning electron microscopic observation. The microstructure having large surface area and the appropriate high resistivity obtained by simultaneous addition of Al2O3 and Li2O showed high sensitivity for inflammable gases at high temperatures 350-500°C and for humidity at low temperatures 25-150°C.
