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

Sensors

Noriya Izu¹  Sayaka Nishizaki²  Woosuck Shin²  Toshio Itoh²  Maiko Nishibori² 

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

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

DOI  :  10.3390/s91108884

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.