【摘要】 采用化学共沉淀法合成了不同配比的NiO-SnO₂气敏材料。用X射线衍射法分析了材料的结构与组成,测试了元件的气敏性能,并利用表面催化作用较好地解释了材料的敏感机理。通过改变NiO的掺杂量及气敏元件的加热功率,NiO-SnO₂材料可分别实现对H₂,C₂H₅OH的选择性检测以及对C₂H₅OH、H₂、CO、C₄H₁₀和汽油等气体的广谱检测。更多还原

【Abstract】 NiO-SnO₂ gas sensing materials of different mole ratio were made by chemical co-precipitation. The composition and structure of the materials were analyzed by means of X-ray diffraction, and the gas-sensing properties were measured with RQ-2 type gas-sensing analyzer. In addition, gas-sensing mechanism of the materials was explained with catalytic effect of NiO and ABO₃ oxides. NiO-SnO₂ sensors can be used to detect inflammable gases and selectively detect H₂or C₂h₄OH by changing heating power and doping quantity of NiO.更多还原