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NiO/YSZ结构NO传感器的敏感特性

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Abstract:

制备以Y2O3稳定的ZrO2(yttriastabilizedzirconia,YSZ)为固体电解质、NiO为敏感电极的混合电势型NO传感器。用X射线衍射仪和扫描电镜对该传感器进行理化分析,测量其在不同高温和不同NO体积(下同)浓度的气氛中的响应电势,通过电化学阻抗谱分析法研究该传感器的高温阻抗谱特性。结果显示在500~750℃,该传感器响应表现为与NO浓度的对数呈明显线性关系的负电势,电势幅值和灵敏度均随工作温度的升高而减小。在600℃,阻抗谱形成的半圆弧随NO浓度的增加呈规律性缩小。

References

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