摘要
定量分析了多孔半导体陶瓷低湿度的湿敏机理 ,通过理论推导 ,得出电阻与相对湿度关系的解析表达式 .湿度较低时 ,半导体陶瓷中电子电导是主要的 .假定吸附表面态由吸附氧离子构成 ,表面态吸附水分子后 ,向体内发射电子 ,用统计理论对这一过程进行推演 ,得出了阻
The humidity sensitive mechanism of porous semiconductive ceramics is analysed quantatively.We classified the humidity into high humidity and low humidity.A theoretical model was presented in low humidity range.As a result we have got an analytic expression of the relation between resistance and relative humidity.In the low humidity area,electron coductance is dominant.We assume that the absorbing surface states(ASS) are constructed by absorbed oxygen ions.When a water molecule is absorbed on ASS,a free electron is simultaneusly emitted into the bulk conduction band.Using the method of statistical thermodynamics to deduce this process,we have got the relation between resistance and relative humidity.
出处
《内蒙古师范大学学报（自然科学汉文版）》
CAS
2000年第1期24-27,共4页
Journal of Inner Mongolia Normal University(Natural Science Edition)
关键词
多孔半导体陶瓷
相对湿度
低湿度
湿敏机制
porous semiconductive ceramics
relative humidity
surface absorption
