Gas response, response time and selectivity of a resistive CO sensor based on two connected CeO2 thick films with various particle sizes

Noriya Izu, Sayaka Nishizaki, Toshio Itoh, Maiko Nishibori, Woosuck Shin, Ichiro Matsubara

研究成果: Article査読

46 被引用数 (Scopus)

抄録

CO sensor elements were fabricated by connecting two cerium oxide (ceria) thick films with and without Pt/alumina catalyst. The resistance of the thick films and the output voltage of the connected sensor elementwere investigated by changing the particle size of the cerium oxide thick films. The cerium oxide thick film sintered at 950 °C, which had a particle size of 50 nm, displayed better response for CO gas and lower resistance than those films sintered at 800 or 1000 °C. The resistance of the cerium oxide thick film sintered at 950 °C changed more quickly than those sintered at 800 or 1030 °C, when air including COwas introduced. The 90% response time of the cerium oxide thick film sintered at 950 °Cwas approximately 2 s. The connected sensor element with Pt/alumina catalyst fabricated in this study exhibited low response for combustible gases such as methane, ethane, propane, ethylene, and H2 at 450 °C, indicating that the connected sensor element has CO selectivity.

本文言語English
ページ(範囲)364-370
ページ数7
ジャーナルSensors and Actuators, B: Chemical
136
2
DOI
出版ステータスPublished - 2009
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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