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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록· 키워드
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Simple, small and portable oxygen sensors were fabricated by tape casting technique. Yttria stabilized zirconia containing cordierite ceramics (YSZC) were used as a porous diffused layer of oxygen in pumping cell. Yttria stabilized zirconia (YSZ) solid electrolyte, YSZC porous diffusion layer and heater-patterned ceramic sheets were prepared by co-firing method. Limit current characteristics and the linear relationship of current to oxygen concentration were observed. Viscosity variation of the slurries both YSZ and YSZC showed a similar behavior, but micro pores in the fired sheet were increased with increasing of the cordierite amount. Molecular diffusion was dominated due to the formation of large pores in porous diffusion layer. The plateau range of limit current in porous-type oxygen sensor was narrow than the one of aperture-type oxygen sensor. However limit current curve was appeared in porous-type oxygen sensor even at the lower applied voltage. The plateau range of limit-current was widen as increasing the thickness of porous diffusion layer of the YSZ containing cordierite. Measuring temperature of 600 ~ 650 oC was recommended for limit-current oxygen sensor. Porous diffusion layer-type oxygen sensor showed faster response than the aperture-type one and was stable up to 30 days running without any crack at interface between the layers.
목차
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참고문헌 (14)
참고문헌 신청
B. Kim / 1996 / A wide range air-fuel ratio sensor with a plate-type structure / Solid State Ionics 86-88 : 1079 ~ 1085
J. Lee / 1999 / A new catalyst monitoring sensor for gasoline engine using YSZ-Al₂O₃ as solid electrolyte and gas diffusion barrier / Sens. Actuators B 59 : 9 ~ 15
J. Park / 2007 / Potentiometric NOx sensors for automotive exhaust using YSZ (yttria stabilizes zirconia) electrolyte / J. Kor. Sens. Soc 16 (6) : 434 ~ 440
L. Heyne / 1976 / In measurement of oxygen / North-Holland Pub. Co., : 65 ~
M. Nakazawa / 1986 / Limit-current type oxygen sensor and its application / Functional Materials 6 : 32 ~ 41
J. Lee / 1999 / A new catalyst monitoring sensor for gasoline engine using YSZ-Al₂O₃ as solid electrolyte and gas diffusion barrier / Sens. Actuators B 59 : 9 ~ 15
J. Park / 2007 / Potentiometric NOx sensors for automotive exhaust using YSZ (yttria stabilizes zirconia) electrolyte / J. Kor. Sens. Soc 16 (6) : 434 ~ 440
L. Heyne / 1976 / In measurement of oxygen / North-Holland Pub. Co., : 65 ~
M. Nakazawa / 1986 / Limit-current type oxygen sensor and its application / Functional Materials 6 : 32 ~ 41
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