CAPACITANCE EFFECTS AND GASEOUS ADSORPTION ON PURE AND DOPED POLYCRYSTALLINE TIN OXIDE

被引：30

作者：

LABEAU, M

SCHMATZ, U

DELABOUGLISE, G

ROMAN, J

VALLETREGI, M

GASKOV, A

机构：

[1] UNIV COMPLUTENSE MADRID,FAC QUIM,DEPT QUIM INORGAN & BIOINORGAN,E-28040 MADRID,SPAIN

[2] MOSCOW MV LOMONOSOV STATE UNIV,DEPT INORGAN CHEM,MOSCOW 119899,RUSSIA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1995年 / 26卷 / 1-3期

关键词：

CAPACITANCE; ADSORPTION; DOPING; POLYCRYSTAL; TIN OXIDE; GAS SENSOR;

D O I：

10.1016/0925-4005(94)01554-U

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Conductance and capacitance effects have been studied simultaneously on thin films and ceramics of tin oxide by using d.c. conductance and impedance measurements. Pure SnO2 and SnO2-CuO composite materials were studied. The total resistance of the samples is mainly due to the grain boundaries and the adsorption on these boundaries of gaseous species with high dielectric constant as ethanol leads to a high capacitance value. This capacitance effect is more important in ceramics than in thin films. n-type SnO2-p-type CuO composite materials exhibit particular capacitance and conductance responses under pollutant gas, due to n-p junctions at the SnO2-CuO interfaces.

引用

页码：49 / 52

页数：4

共 6 条

[1]

Xu C., Tamaki J., Miura N., Yamazoe N., Grain size effects on gas sensitivity of porous SnO2-based elements, Sensors and Actuators B, 3, pp. 147-155, (1991)

[2]

McAleer J.F., Moseley P.T., Norris J.O.W., Williams D.E., Tin dioxide gas sensors. Part 1. Aspects of the surface chemistry revealed by electrical conductance variations, J. Chem. Soc. Faraday Trans. 1, 83, (1987)

[3]

Gautheron B., Labeau M., Delabouglise G., Schmatz U., Undoped and Pd-doped SnO2 thin films for gas sensors, Sensors and Actuators B: Chemical, 15-16, (1993)

[4]

Cabanas M.V., Gonzalez-Calbet J.M., Labeau M., Mollard P., Pernet M., Vallet-Regis M., Evolution of the microstructure and its influence on the magnetic properties of aerosol synthesized BaFe12O19 particles, J. Solid State Chem., 101, (1992)

[5]

Schmatz U., Delabouglise G., Labeau M., Garden J., Electrical and microstructural studies of SnO2 ceramics obtained by tin sulfate pyrolysis, J. Electrochem. Soc., 141, (1994)

[6]

Ishihara T., Kometani K., Mizuhara Y., Takita Y., Mixed oxide capacitor of CuO-BaTiO3 as a new type of CO2 gas sensor, Journal of the American Ceramic Society, 75, pp. 613-618, (1992)

← 1 →