Abstract
The new type solid-electrolyte impedance metric NOx sensor device composed of Li1.5Al0.5Ti1.5(PO4)3 (LATP) as a transducer and various types of oxide (n-type :TiO2, SnO2, WO3, p-type :NiO, Cr2O3 semiconductors and perovskite-type oxides LaBO3 (B= Co, Cr, Ni, Mn, Fe) ) as a receptor, respectively, have been systematically investigated for the detection of NOx (NO and NO2 ) in the range 10-200ppm at 400-500ºC. Responses of these sensors were able to divide component between resistance and capacitance, and it was found that the device is applicable to the selective detection of NO and NO2 concentration in each ingredient. Respectively TiO2, SnO2 and perovskite-type oxide based receptor gave good responses to NO and NO2.
