Dense diffusion barrier limiting current oxygen sensors

摘要: Abstract A new type of miniature amperometric oxygen sensor has been developed. The sensors are high temperature micro-electrochemical devices that use a dense diffusion barrier metal oxide readily transports and conduct electrons. is deposited in thin film form on top zirconia-based electrochemical pump. When voltage applied to the pump, depleted from one side ionic current proportional flux across layer. If pumping reaches enough value, transport membrane hence device’s output current, will be limited by external, concentration characteristics barrier. can manufactured planar design offers faster time response, much simpler potentially lower cost than existing limiting sensors.