Nitrogen Oxides Sensing Properties of Oxide-Semiconductor Sensors Using CO₃O₄-Fe₂O₃ Composite

• Tamaki Jun

  Ritsumeikan University

• Nagaoka Tadahito

  Ritsumeikan University

• Yamamoto Yoshifumi

  Ritsumeikan University

• Matsuoka Masao

  Ritsumeikan University

Bibliographic Information

Other Title

• Co₃O₄-Fe₂O₃複合体を用いた酸化物半導体センサのNO_x検知特性
• Co3O4 Fe2O3 フクゴウタイ オ モチイタ サンカブツ ハンドウタイ

Abstract

Semiconductor gas sensors having a combination of p- and n-type oxides have been investigated for detecting a small amount of NO. Among 16 kinds of p-n combinations tested, the Co₃O₄-Fe₂O₃ composite sensor exhibited excellent sensing properties to NO at 300°C. When the Co₃O₄ content in the composite was set to 20wt%, the sensitivity to 50 ppm NO was the maximum as high as 2.8, while that to 50 ppm NO₂ was 1.5, indicating the highly sensitive and selective nature to NO. Further, the sensor showed the almost linear correlation between logarithm of NO sensitivity and that of NO concentration in the range of 5-100 ppm NO. These results suggest that the Co₃O₄-Fe₂O₃ composite sensor can be a candidate of NO sensor for combustion monitoring. The addition of Co₃O₄ promoted the formation of NO^- adsorbate on the composite surface, resulting in the high NO sensitivity.

Journal

• IEEJ Transactions on Sensors and Micromachines

  IEEJ Transactions on Sensors and Micromachines 118 (2), 125-129, 1998

  The Institute of Electrical Engineers of Japan

Keywords

• 半導体ガスセンサ
• NOセンサ
• 排ガスモニタリング
• p-n接合

Details

• CRID: 1390282679439429632
• NII Article ID: 10004834134
• NII Article ID: 10004833186
• NII Book ID: AN1052634X
• DOI: 10.1541/ieejsmas.118.125
• ISSN: 13475525
• ISSN: 13418939
• NDL BIB ID: 4392295
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4392295
• Web Site: http://www.jstage.jst.go.jp/article/ieejsmas1995/118/2/118_2_125/_pdf
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed