ZnO-SnO₂系複合酸化物のイソブタンガス感度特性

抄録

Bulk gas sensors composed of various atomic ratios of ZnO and SnO₂ were fabricated and their gas sensing characteristics were investigated. After powder mixtures of ZnO and SnO₂ together with equal weights of camphor were pressed into disks, they were sintered at 1200°C for 3h in air. The relationship between the atomic ratio of ZnO and SnO₂ and the gas sensing characteristics was investigated. As a result of the measurements of the conductance of these gas sensors upon exposure to 2vol% i-C₄H₁₀ gas, the sensor consisting of Zn:Sn=0.68:0.32 was found to have the highest sensitivity. After the atmosphere was changed from i-C₄H₁₀ to air, the conductance returned to almost the initial level within 1min.