The Research about La0.8Sr0.2CoO3 Application as Dense Diffusion Barrier in Limiting Current Oxygen Sensors

Yin Lin Wu; Hai Yan Zhao; Fu Shen Li

doi:10.4028/www.scientific.net/AMR.703.111

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The Research about La_0.8Sr_0.2CoO₃ Application as Dense Diffusion Barrier in Limiting Current Oxygen Sensors
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The Research about La_0.8Sr_0.2CoO₃ Application as Dense Diffusion Barrier in Limiting Current Oxygen Sensors

Abstract:

The fabrication and operation of a new thick film type of limiting current oxygen sensor is demonstrated that utilizes yttria (8% mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La_0.8Sr_0.2CoO₃ (LSC) as diffusion barrier. The oxygen sensor shows a near linear response between 0 to 10.5% O₂ in argon at 1023K. The advantages of the sensor are simple construction, low cost and potential long term stability.