致密扩散障碍层极限电流型氢传感器  

Dense Diffusion Barrier Limiting Current Hydrogen Sensor

作　　者：郭红霞[1] 吕敬德[1,2] 王岭[1] 唐晓微[1] 

机构地区：[1]河北理工大学化工与生物技术学院,唐山063009 [2]唐山中润煤化工有限公司,唐山063611

出　　处：《无机化学学报》2008年第10期1631-1635,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.50772030,50572024)。

摘　　要：使用BaCe0.9Y0.1O3-δ作为固体电解质,SrCe0.95Tm0.05O3-δ为致密扩散障碍层,制备了新型致密扩散障碍层极限电流型氢传感器。采用X射线衍射仪、扫描电子显微镜表征了氢传感器上下两层材料的物相和微观结构,应用IM6e型电化学工作站测试了其氢敏性能。结果表明,1550℃烧结10h可以获得单相致密的钙钛矿结构BaCe0.9Y0.1O3-δ和SrCe0.95Tm0.05O3-δ。氢传感器在600～800℃,氢浓度小于17700μL·L-1时,具有良好的极限电流平台,极限电流与氢浓度成线性关系。传感器的灵敏度随测试温度的升高而增大,800℃时其灵敏度达1.30μA·(μL·L-1)-1。A dense diffusion barrier limiting current hydrogen sensor was developed, with BaCe0.9Y0.1O3-δ as proton conduction solid electrolyte and SrCe0.95Tm0.05O3-δ as dense diffusion barrier. The crystalline phase and microstructures of above-below two layers for hydrogen sensor were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）. Hydrogen sensing properties of the sensor were investigated by IM6e electrochemical workstation. The results indicate that pure and dense perovskite BaCe0.9Y0.1O3-δ and SrCe0.95Tm0.05O3-δ are obtained at sintering temperature of 1 550℃ for 10 h. Nearly flat limiting currents for hydrogen sensor are observed at a hydrogen concentration less than 17 700 μL·L^-1 at testing temperature from 600℃ to 800℃. There is an excellent linear relationship between hydrogen concentration and limiting current. The sensitivity to hydrogen increases with temperature and it is 1.30μA·（μL·L^-1）^-1 at 800℃.

关 键 词：氢传感器 极限电流 质子导体 混合导体 

分 类 号：O614.33[理学—无机化学] O614.23[理学—化学]