摘要
用H2＋Ar电弧等离子体法制成纳米ZnO，ZnO－Fe，研究了其气敏特性及机理．结果表明：与其它制各方法相比，该方法制成的纳米ZnO气敏元件在没有贵金属掺杂的情况下具有较高的灵敏度．工作温度为200℃～250℃，为常规元件的一半纳米ZnO－Fe－Pd对液化石油气（LPG）的选择性比纳米ZnO好，具有快速响应（＜15s）和恢复特性，能稳定地连续工作70h以上。
Nanometer ZnO, ZnO-Fe were prepared by H2+Ar arc plasma method. Compared with coarsegrained ZnO, nanometer ZnO possesses evidently grain-size effect and the operating temperatures shift toward lower temperature (200℃~250℃). The sensitivity increases rapidly with decreasing grain size into nanometer regime, nano-ZnO exhibits higher sensitivities to LPG, C2H2 against H2, CO. Compared with nanometer ZnO. ZnO-Fe and ZnO-Pd, nanometer ZnO-Fe-Pd exhibits excellent selectivity to LPG with high sensitivity at <200℃ and the response time is less than 15 s, which can be made as low-power selective LPG gas sensor. The gas sensing properties of ZnO-Fe-Pd is related to grain-size effect and additive effect.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
1998年第4期407-410,共4页
Chinese Journal of Materials Research
基金
国家计委资助
山东省自然科学基金
