CH4 THICK-FILM GAS SENSORS - CHARACTERIZATION METHOD AND THEORETICAL EXPLANATION

被引：44

作者：

CAROTTA, MC ^{[1
]}

DALLARA, C ^{[1
]}

MARTINELLI, G ^{[1
]}

PASSARI, L ^{[1
]}

CAMANZI, A ^{[1
]}

机构：

[1] ENIRICERCHE SPA,I-00015 MONTEROTONDO,ITALY

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1991年 / 3卷 / 03期

关键词：

D O I：

10.1016/0925-4005(91)80005-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The characterization of SnO2 thick-film gas sensors made from a homemade binderless paste is given. The Hall effect has been measured together with the conductance to determine the carrier concentration and the mobility. From temperature-stimulated conductance measurements at several fixed temperatures, the range where the intergranular conductance can be reasonably considered to be constant has been explored. The microstructure and morphology of the samples are analysed by TEM and SEM observations. The results confirm for these sensors the possibility of linking the electronic structure of the bulk and the chemical state of the surface by an energy barrier model. Moreover, we correlate the difference between the maximum and the minimum of the barrier energy, DELTA-E, to the sensitivity to reducing gas.

引用

页码：191 / 196

页数：6

共 11 条

[1]

CHANG SC, 1983, P INT M CHEM SENSORS, P78

[2] HALL EFFECT STUDIES OF OXYGEN CHEMISORPTION ON ZINC OXIDE [J].