کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
740674 894181 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Temperature independent resistive oxygen sensor prepared using zirconia-doped ceria powders
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Temperature independent resistive oxygen sensor prepared using zirconia-doped ceria powders
چکیده انگلیسی

A resistive oxygen sensor with extremely good temperature independence within a temperature range of 923–1123 K was fabricated from precipitated ceria–zirconia solid solution powders. Experimental results identified the as-precipitated powders as a nanocrystalline ZrO2-doped CeO2 (ZDC) solid solution phase. The amount of Ce3+ in CeO2 film was increased by doping with ZrO2, identified by XPS. The electrical resistance of ZDC film showed a more significant decreasing rate than that of the undoped CeO2 at lower oxygen partial pressure. An n-type semiconductance of ZDC films was obtained under oxygen partial pressures from 1.0 to <10−15 atm. We selected two compositions of the ZDC films whose activation energies were approximately equal (∼1.69 eV at 1.0 atm and ∼1.66 eV at 0.01 atm) for the fabrication of temperature independent resistive oxygen sensors. ZDC films containing 10 at% and 5 at% ZrO2 (10ZDC and 5ZDC) were used as OMM (oxygen partial pressure measurement material) and TCM (temperature compensating material), respectively. This study confirms the conductive behaviors of ZDC at various oxygen partial pressures as a function of temperature, as well as the suitability of ZDC films for application as temperature independent oxygen sensors. The dynamic response of the resistive oxygen sensor with TCM also revealed that the sensor possessed a relatively good sensibility and stability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 162, Issue 1, 20 February 2012, Pages 68–75
نویسندگان
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