A CO2 gas sensor based upon composite Nasicon/Sr-β-Al2O3 bielectrolyte
A novel tube shape CO2 gas sensor based upon interfacing two composite solid electrolytes-Nasicon/glass and Sr-β-Al2O3/YSZ with a BaCO3/Na2CO3 (4:6) auxiliary electrode has been investigated. In the sensor, Nasicon/glass is melted in Sr-β-Al2O3/YSZ tube, BaCO3/Na2CO3 (4:6) placed on top surface of Nasicon/glass as auxiliary electrode and Pt coating on outer surface of Sr-β-Al2O3/YSZ tube as reference electrode. The experimental results have shown that the sensor has excellent sensing performance. The relationship between emf of the sensor and logarithm of partial pressure of CO2 is linear over a concentration range of 12-10,000 ppm at a fixed temperature. The oxygen content in mixture gas does not affect response signals of the sensor. Up to 100 ppm NO2 does not change sensor performance. SO2 is a serious interference gas due to its reaction with electrolyte and carbonates sensing electrode. The tolerable limit of the CO2 sensor to SO2 was 1.7 ppm.
CO2 sensor Solid electrolytes Sr-β-Al2O3 Nasicon composite
Ling Wang Huizhu Zhou Kui Liu Yinlin Wu Lei Dai R.V.Kumar
Hebei Polytechnic University, Tangshan City, Hebei Province, 063009 China niversity of Science and Technology Hebei, Shijiazhuang City, Hebei Province, China Department of Materials Science and Metallurgy, University of Cambridge, UK
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
1662-1665
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）