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performance of mixed conducting electrodchemical filters for YSZ oxygen sensors

机译:YSZ氧传感器混合导电电化学过滤器的性能

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摘要

Oxygen sensors based on yttria stabilized zirconia (YSZ), used in some industrial applications, can be protected by dense filters with high electrochemical permeability to ensure longer lifetinme however, the performance of such sensors can be affected by the surface properties of the filter. This work reports on the relevance of surface processes on the overall oxygen transport rate across the filter. Different materials (filter and electrodes) were tested for this purpose, invo0lving LaCoO_3 (LC) and Ce_0.8Gd_0.O_2 (GCO) single phase or composite filers (combination of both Phases), and different deposited electrode materials ((La, Sr)Mno_3 and Pt). For a typical combination Involving an ionic conductor as filter (GCO) and electronic conductors as electrodes, the cathodic Process seems to be more relevant than the anodic one in determining the protected sensor Performance.
机译:在某些工业应用中使用的基于氧化钇稳定的氧化锆(YSZ)的氧气传感器可以通过具有高电化学渗透性的致密过滤器进行保护,以确保更长的使用寿命,但是此类传感器的性能会受到过滤器表面性能的影响。这项工作报告了表面过程对整个过滤器上氧气输送速率的相关性。为此测试了不同的材料(过滤器和电极),LaCoO_3(LC)和Ce_0.8Gd_0.O_2(GCO)单相或复合填充剂(两相的组合)以及不同的沉积电极材料((La,Sr) Mno_3和Pt)。对于包含离子导体作为过滤器(GCO)和电子导体作为电极的典型组合,在确定受保护的传感器性能方面,阴极工艺似乎比阳极工艺更为重要。

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