Abstract Strontium titanate based materials are promising candidates for fabrication of oxygen sensors. As a dense diffusion barrier layer of limiting current oxygen sensor, strontium titanate based materials should be able to control the diffusion rate of oxygen ions or accelerate the formation of limiting current. Based on this key question, indium oxide was introduced to strontium titanate based materials and then Y0.08Sr0.92Ti0.6Fe0.4-xO3-δ/x/2 In2O3 (x=0.04, 0.06, 0.08) composites were prepared. To understand the efficacy of doping indium oxide on the physical and sensing properties of the strontium titanate, the ionic and electronic conductivity were intently investigated. The obtained results demonstrated that the ionic and total conductivity simultaneously increased upon increasing the concentration of indium oxide dopant. Increasing the content of In2O3 accelerates the occurrence of limiting current of the sensor at lower voltages and then elevate the working life of the sensor.

中文翻译：

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限流氧传感器的混合电导率评估及传感特性

摘要 钛酸锶基材料是制造氧传感器的有前途的候选材料。作为极限电流氧传感器的致密扩散阻挡层，钛酸锶基材料应该能够控制氧离子的扩散速率或加速极限电流的形成。基于这个关键问题，将氧化铟引入到钛酸锶基材料中，然后制备了 Y0.08Sr0.92Ti0.6Fe0.4-xO3-δ/x/2 In2O3 (x=0.04, 0.06, 0.08) 复合材料。为了了解掺杂氧化铟对钛酸锶的物理和传感性能的影响，我们仔细研究了离子和电子电导率。所得结果表明，随着氧化铟掺杂剂浓度的增加，离子电导率和总电导率同时增加。