| 致密扩散障碍层极限电流型氢传感器 |
| Dense Diffusion Barrier Limiting Current Hydrogen Sensor |
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| 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，1 550 ℃烧结10 h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17 700 μL·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1.30 μA·(μL·L-1)-1。 |
| 关键词: 氢传感器 极限电流 质子导体 混合导体 |
| 基金项目: |
| Abstract: 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 microstru-ctures 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 1.30 μA·(μL·L-1)-1 at 800 ℃. |
| Keywords: hydrogen sensor limiting current proton conductor mixed conductor |
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| 郭红霞,吕敬德,王 岭,唐晓微.致密扩散障碍层极限电流型氢传感器[J].无机化学学报,2008,24(10):1631-1635. |
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