NOx Gas Sensing Properties of ZnO-based Varistor-type Gas Sensors

• Shimizu Yasuhiro

  Nagasaki University

• Iwanaga Tomoko

  Nagasaki University

• Takao Yuji

  Nagasaki University

• Egashira Makoto

  Nagasaki University

書誌事項

タイトル別名

• NO_x Gas Sensing Properties of ZnO-based Varistor-type Gas Sensors
• NOx Gas Sensing Properties of ZnO-based

抄録

Current (I)-voltage (V) characteristics of ZnO-based oxides have been investigated in air as well as in 100 ppm NO₂ and NO balanced with air at elevated temperatures. A pure ZnO exhibited a nonlinear I-V characteristic in air and its breakdown voltage shifted to a high electric filed upon exposure to NO₂, but to a low electric field upon exposure to NO. Grain size of ZnO was increased slightly by the Bi₂O₃-based additive, which is essential for fabricating conventional varistors used as voltage-surge suppressors. In accordance with this change the sensitivities to NO₂ and NO were decreased, especially at 300°C. The Bi₂O₃-based additive containing Y₂O₃ was effective for reducing the grain size slightly, increasing the breakdown voltage in air and enhancing sensitivities, especially to NO₂ at 400°C and to NO at 300°C. The addition of Cr₂O₃ to the Bi₂O₃-based additive containing Y₂O₃ was more effective for reducing the grain size, but led to a deterioration of sensitivities to NO₂ and NO.

収録刊行物

• 電気学会論文誌Ｅ（センサ・マイクロマシン部門誌）

  電気学会論文誌Ｅ（センサ・マイクロマシン部門誌） 118 (2), 130-135, 1998

  一般社団法人 電気学会

キーワード

• varistor
• ZnO
• NO_x sensor
• nonlinear I-V characteristic
• breakdown voltage

詳細情報

• CRID: 1390001204462714368
• NII論文ID: 10004833198
• NII書誌ID: AN1052634X
• DOI: 10.1541/ieejsmas.118.130
• ISSN: 13475525
• ISSN: 13418939
• NDL書誌ID: 4392296
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4392296
• Web Site: http://www.jstage.jst.go.jp/article/ieejsmas1995/118/2/118_2_130/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可