NANOSTRUCTURED SENSOR FOR HIGH TEMPERATURE APPLICAITONS

摘要

A gas sensor utilizes nano-sized CeO₂ and doped CeO₂ particles for detecting NO, NO₂ and also for studying the cross sensitivity of oxygen, un-burnt hydrocarbons, CO and CO₂. Nano-crystalline powders of CeO₂ and doped CeO₂ are employed to configure thin films on Platinum comb type electrodes preformed on alumina substrates. Various catalytic oxides are employed to convert the NO to NO₂ to get equal response to NOx gas. Gas sensing properties are measured using a dynamic chamber with a constant flow of air and NOX gas in required percentage in nitrogen gas.