Abstract
An electrode composed of BiCuVOx and perovskite type oxide was attached to NASICON solid electrolyte, and the interface was applied as a sensor for detecting organic gas. The gas sensor operated at 400-500 oC showed fairly good sensing properties to alcohol and aldehyde. It was found that the sensor response increases with decreasing the thickness of composite oxides electrode, indicating that the interface between composite oxide electrode and NASICON solid electrolyte plays an important part as a reaction place.