YSZ 전해질을 이용한 농담전지식 자동차용 NOx센서
Potentiometric NOx sensors for automotive exhaust using YSZ(yittria stabilized zirconia) electrolyte
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Abstract
Two kinds of new NOx sensing mechanism was proposed and examined. One of those was potentiomtric sensor basedon the measurement of decomposed oxygen from NO using YSZ porous difusion barier and Pd catalytic electrode. The2 environment andthe sensitivities were coincident with theoretical values at 700 and 800oC but the decomposition rate depended on gasflow rate. The other sensor was equilibrium potentiometric type using Gd2O3-nitrates solid solution as sensing material.The sensor using Gd2O3-nitrates solid solution was suitable for NOx sensing at 700oC in 5 % oxygen and the sensitivitywas 19.3 mV/decade. However, long term stability of the sensing material at high temperature was not sufficient.
참고문헌 (11)
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