Thick-film gas microsensors based on tin dioxide

摘要

Semiconductive-resistive sensors of toxic and explosive gases were fabricated from nanograins of SnO_2 using thick-film technology.Sensitivity,selectivity and stability of sensors working in different temperature depend on the way the tin dioxide and additives were prepared.A construction also plays an important role.The paper presents an attitude towards the evaluation of transport of electrical charges in Semiconductive grain layer of SnO_2,when dangerous gases appear in the surrounding atmosphere.