Mechanism of NOx Sensing by the Variation of Conductivity of La2CuO4 (特集 環境ガスセンサ) Mechanism of NOx Sensing by the Variation of Conductivity of La_2CuO_4

この論文にアクセスする

この論文をさがす

著者

抄録

In order to make clear the mechanism of the variation in the conductivity of La<sub>2</sub>CuO<sub>4</sub> with a small amount of NO<sub>x</sub> (x=1, 2) in oxygen atmosphere, measurements were made on the conductivity of La<sub>2</sub>CuO<sub>4</sub> in the stream of NO<sub>x</sub>-0<sub>2</sub>-N<sub>2</sub> gas mixtures at temperatures 773-1023K and the outlet gas was analyzed by a zirconia sensor. The conductivity and the EMF of the zirconia sensor were analyzed in relation to P(NO<sub>x</sub>). P(O<sub>2</sub>) and T. When NO<sub>2</sub> was applied to La<sub>2</sub>CuO<sub>4</sub>, catalytic reaction of NO<sub>2</sub>→NO+(1/2)O<sub>2</sub> was found to take place. In the catalytic reaction process, excess oxygen was considered to be incorporated into La<sub>2</sub>CuO<sub>4</sub>. Under the steady state. the oxygen potential in La<sub>2</sub>CuO<sub>4</sub> was kept much higher than that in the gas phase. resulting in the increase in the p-type conduction of La<sub>2</sub>CuO<sub>4</sub>. Numerical calculations were made for the oxygen potential enhanced in La<sub>2</sub>CuO<sub>4</sub> as a function of P(NO<sub>2</sub>) and T to make clear the detection limits of La<sub>2</sub>CuO<sub>4</sub>-type NO<sub>2</sub> sensors in relation to the gas phase P(O<sub>2</sub>) and T. Under the condition studied, NO affects very little to reduce the conductivity of La<sub>2</sub>CuO<sub>4</sub>. The reason was discussed based on the catalytic reaction kinetics to show the direction to enhance the NO effect in La<sub>2</sub>CuO<sub>4</sub>.

収録刊行物

  • 電気学会論文誌. E, センサ・マイクロマシン準部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A publication of Sensors and Micromachines Society  

    電気学会論文誌. E, センサ・マイクロマシン準部門誌 = The transactions of the Institute of Electrical Engineers of Japan. A publication of Sensors and Micromachines Society 118(2), 161-167, 1998-02 

    The Institute of Electrical Engineers of Japan

参考文献:  9件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

被引用文献:  1件

被引用文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10004833273
  • NII書誌ID(NCID)
    AN1052634X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13418939
  • NDL 記事登録ID
    4392301
  • NDL 雑誌分類
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL 請求記号
    Z16-B380
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
ページトップへ