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• Izu, N
• Nishizaki, S
• Shin, W
• Itoh, T
• Nishibori, M
• Matsubara, I
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• Izu, N
• Nishizaki, S
• Shin, W
• Itoh, T
• Nishibori, M
• Matsubara, I
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• Izu, N
• Nishizaki, S
• Shin, W
• Itoh, T
• Nishibori, M
• Matsubara, I

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Sensors 2009, 9(11), 8884-8895; doi:10.3390/s91108884

Article

Resistive Oxygen Sensor Using Ceria-Zirconia Sensor Material and Ceria-Yttria Temperature Compensating Material for Lean-Burn Engine

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

National Institute of Advanced Industrial Science and Technology (AIST), Advanced Manufacturing Research Institute, 2266-98 Anagahora, Shimo-Shidami, Moriyama-ku, Nagoya 463-8560, Japan

* Author to whom correspondence should be addressed.

Received: 14 September 2009; in revised form: 13 October 2009 / Accepted: 2 November 2009 / Published: 5 November 2009

(This article belongs to the Section Chemical Sensors)

Download PDF Full-Text [587 KB, uploaded 5 November 2009 12:01 CET]

Abstract: Temperature compensating materials were investigated for a resistive oxygen sensor using Ce_0.9Zr_0.1O₂ as a sensor material for lean-burn engines. The temperature dependence of a temperature compensating material should be the same as the sensor material; therefore, the Y concentration in CeO₂-Y₂O₃ was optimized. The resistance of Ce_0.5Y_0.5O_2-δ was independent of the air-to-fuel ratio (oxygen partial pressure), so that it was confirmed to function as a temperature compensating material. Sensor elements comprised of Ce_0.9Zr_0.1O₂ and Ce_0.5Y_0.5O_2-δ were fabricated and the output was determined to be approximately independent of the temperature in the wide range from 773 to 1,073 K.

Keywords: air-to-fuel ratio; automobile; gas sensor; solid electrolyte; resistive-type

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