研究了以金红石TiO2半导体材料为气敏材料的一氧化碳(CO)传感器在600～800℃之间的气敏性能.该传感器在测试温度600～700℃时对20～2000 mg/m3的CO(载气为氮氧混合物且氧气含量为2％-25％)表现出p型电导行为.随着测试温度从600℃升高至700℃,传感器的感应强度迅速下降到接近于1.当温度升高到750℃以上时,传感器再次出现对CO的感应强度并且表现出n型导电行为.随着温度升高到800℃,传感嚣对CO的n型感应信号进一步增强,表现出良好的高温感应性能.利用交流阻抗谱仪对该TiO2敏感材料的高温导电特性进行了研究,并初步讨论了TiO2在高温下对CO还原气氛的诱导导电性能变化的原因.
参考文献
| [1] | Akbar S A,Dutta P K,Lee C.High-temperature ceramic gas sensors:a review.Int.J.Appl.Ceram.Technol.,2006,3(4):302-311. |
| [2] | Ménil F,Coillard V,Lucat C.Critical review of nitrogen monoxide sensors for exhaustive gases of lean bum engines.Sensors and Actuators B:Chemical,2000,67(1/2):1-23. |
| [3] | Miura N,Wang J,Nakatou M,et al.NOx sensing characteristics of mixed-potential-typc zirconia sensor using NiO sensing electrode at high temperatures.Electrochem.Solid-State Lett.,2005,8(2):H9-H11. |
| [4] | Hibino T,Wang S,Kakimoto S,et al.Detection of propylene under oxidizing conditions using zirconia-based potentiometric sensor.Sensors and Actuators B:Chemical,1998,50(2):149-155. |
| [5] | Fergus J W.Solid electrolyte based sensors for the measurement of CO and hydrocarbon gases.Sens.Actuators B,2006,122(2):683-693. |
| [6] | Fleischer M,Meixner H.Sensitive,selective and stable CH4 detec tion using semiconducting Ga2O3 thin film.Sensors and Actuators B:Chemical,1995,26(1/2/3):81-84. |
| [7] | Birkefeld L D,Azad A M,Akbar S A.Carbon monoxide and hydrogen detection by anatase modification of titanium dioxide.J.Am.Ceram.Soc.,1992,75(11):2964 2969. |
| [8] | Dutta P K,Ginwalla A,Hogg B,et al.Interaction of CO with anatase surfaces at high temperatures:optimization of a CO sensor.J.Phys.Chem.B.1999,103(21):4412-4422. |
| [9] | Savage N,Chwieroth B,Ginwalla A,et al.Composite n-p semiconducting titanium oxides as gas sensors.Sensors and Actuators B:Chemical,2001,79(1):17-27. |
| [10] | Savage N,Akbar S A,Dutta P K.Titanium dioxide based high temperature carbon monoxide selective sensor.Sensors and Actuators B:Chemical,2001,72(3):239-248. |
| [11] | Dutta P K,De Lucia M F.Correlation of catalytic activity and sensor response in TiO2 high temperature gas sensors.Sensors & Actuators B:Chemical,2006,115(1):1-3. |
| [12] | Trimboli.J,Mottern M,Verweij,H.et al.Interaction of water with titania:implications for high-temperature gas sensing.J.Phys.Chem.B,2006,110(11):5647-5654. |
| [13] | Hoefer U,Frank J,Fleischer M.High temperature Ga2O3-gas sensors and SnO2-gas sensors:a comparison.Sens.Actuators B,2001,78(1/2/3):6-11. |
| [14] | Gurlo A,Sahm M,Oprea A,et al.A p-to n-transition on α-Fe2O3-based thick film sensors studied by conductance and work function change measurements.Sensors and Actuators B:Chemical,2004,102(2):291-298. |
| [15] | Gurlo A,Barsan N,Oprea A,et al.An n-to p-type conductivity transition induced by oxygen adsorption on α-Fe2O3.Appl.Phys.Letts.,2004,85(12):2280-2282. |
| [16] | Solis J L,Golovanov V,Lantto V,et al.A study of dual conductance response to carbon monoxide of CdS and α-SnWO4 thin films.Physica Scripta,1994,T54:248-251. |
| [17] | Nowotny J,Radecka M,Rekas M,et al.Electronic and ionic conductivity of TiO2 single crystal within the n-p transition range.Ceramics International,1998,24(8):571-577. |
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