| Effect of ZrO2 （9mol % Y2O3） coating thickness on the electronic conductivity of Mg-PSZ oxygen sensors |
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| 作者姓名： | ChangheGao HaileiZhao QingguoLiu WeijiangWu WeihuaQiu |
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| 作者单位： | MaterialsScienceandEngineeringSchool.UniversityofScienceandTechnologyBeijing,Beijing100083,China |
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| 摘 要： | The ZrO2 (9mol% Y2O3) coating was prepared evenly on the surface of MgO partially stabilized zirconia (Mg-PSZ) tube (oxygen sensor probe) by dipping the green Mg-PSZ tube in a ZrO2, (9mol% Y2O3) slurry and then co-firing at 1750℃ for 8 h. The double-cell method was employed to measure the electronic conductivity parameter and exam the reproducibility of the coated Mg-PSZ tube. The experimental results indicate that the good thermal shock resistance of the Mg-PSZ tube can be retained when the coating thickness is not more than 3.4μm. The ZrO2 (9mol% Y2O3) coating reduces the electronic conductivity parameter remarkably. probably due to the lower electronic conductivity of Y2O3-stabilized ZrO2 than that of MgO-stabilized ZrO2. Moreover, the ZrO2(9mol% Y2O3) coating can improve the reproducibility and accuracy of the Mg-PSZ tube significantly in the low oxygen measurement. The smooth surface feature and lower electronic conductivity of the coated Mg-PSZ tube should be responsible for this improvement.
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| 关 键 词： | 氧化锆 涂层 电子传导性 固体电解质 氧化镁 氧气传感器 稳定性 炼钢工艺 |
Effect of ZrO2 (9mol% Y2O3) coating thickness on the electronic conductivity of Mg-PSZ oxygen sensors |
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| ChangheGao HaileiZhao QingguoLiu WeijiangWu WeihuaQiu.Effect of ZrO2 (9mol% Y2O3) coating thickness on the electronic conductivity of Mg-PSZ oxygen sensors[J].Journal of University of Science and Technology Beijing,2005,12(2):160-165. |
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| Authors: | Changhe Gao Hailei Zhao Qingguo Liu Weijiang Wu Weihua Qiu |
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| Abstract: | The ZrO2 (9mol% Y2O3) coating was prepared evenly on the surface of MgO partially stabilized zirconia (Mg-PSZ) tube (oxygen sensor probe) by dipping the green Mg-PSZ tube in a ZrO2 (9mol% Y2O3) slurry and then co-firing at 1750℃ for 8 h. The double-cell method was employed to measure the electronic conductivity parameter and exam the reproducibility of the coated MgPSZ tube. The experimental results indicate that the good thermal shock resistance of the Mg-PSZ tube can be retained when the coating thickness is not more than 3.4 μm. The ZrO2 (9mol% Y2O3) coating reduces the electronic conductivity parameter remarka -bly, probably due to the lower electronic conductivity of Y2O3-stabilized ZrO2 than that of MgO-stabilized ZrO2. Moreover, the ZrO2 (9mol% Y2O3) coating can improve the reproducibility and accuracy of the Mg-PSZ tube significantly in the low oxygen measurement. The smooth surface feature and lower electronic conductivity of the coated Mg-PSZ tube should be responsible for this improvement. |
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| Keywords: | oxygen sensor stabilized ZrO2 solid electrolyte coating electronic conductivity |
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