연소분위기에서 반도체 산소센서의 특성에 관한 연구
Study of Oxygen Sensing Characteristics by Semiconductor Sensor in a Combustion Environment
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Abstract
Pure single phase lantanium copper oxide (La2CuO4) was synthesized using auto-ignition technique. Appropriate calcination temperature was identified for complete phase formation, and sintering temperature was optimized for desired morphology of sensing electrode to produce best resistive response. Resistive response behavior with varying oxygen gas concentration on lantanium copper oxide have been studied. Oxygen sensor was measured in the temperature range of 400oC~700oC and different concentrations of oxygen. The results show that the resistance of oxygen sensor using YSZ-La2CuO4 decreases with an increase of temperature at given oxygen concentration, and it is good linearity. Also its sensor has faster response property at more than 500oC. The response at optimum temperature was calibrated for actual lean and rich combustion environment.
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