Influence of frozen distributions of oxygen vacancies on tin oxide conductance

被引：43

作者：

Blaustein, G ^{[1
]}

Castro, MS ^{[1
]}

Aldao, CM ^{[1
]}

机构：

[1] Univ Mar del Plata, Inst Mat Sci & Technol, RA-7600 Mar Del Plata, Argentina

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1999年 / 55卷 / 01期

关键词：

tin oxide; gas sensors; sintering process;

D O I：

10.1016/S0925-4005(99)00015-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Resistivity transients of SnO2 sintered pellets at step isothermal changes in oxygen pressure are investigated. It is found that different thermal treatments in sample preparation give rise to diverse behaviors in transient responses. These responses indicate that modulation of the Schottky barriers heights is not enough to explain the observed results. It is proposed that grain sizes and widths of the depletion layers are responsible for the observed results and that an oxygen diffusion process into the tin oxide grain plays a significant role accounting for the observed conductance changes. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：33 / 37

页数：5

共 12 条

[1] INFLUENCE OF MICROSTRUCTURES ON THE FUNCTIONAL-PROPERTIES OF TIN OXIDE-BASED GAS SENSORS [J].

BOTTER, R ;

ASTE, T ;

BERUTO, D .

SENSORS AND ACTUATORS B-CHEMICAL, 1994, 22 (01) :27-35

[2] PREBREAKDOWN CONDUCTION IN ZINC-OXIDE VARISTORS - THERMIONIC OR TUNNEL CURRENTS AND ONE-STEP OR 2-STEP CONDUCTION PROCESSES [J].

CASTRO, MS ;

ALDAO, CM .

APPLIED PHYSICS LETTERS, 1993, 63 (08) :1077-1079

[3] COOLING RATE EFFECTS IN ZNO VARISTORS [J].

CASTRO, MS ;

PERISSINOTTI, L ;

ALDAO, CM .

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 1992, 3 (04) :218-221

[4]

FLIEGEL W, 1994, SENSOR ACTUAT B-CHEM, V18, P474

[5] SURFACE-CHEMISTRY OF TIN OXIDE-BASED GAS SENSORS [J].

GAGGIOTTI, G ;

GALDIKAS, A ;

KACIULIS, S ;

MATTOGNO, G ;

SETKUS, A .

JOURNAL OF APPLIED PHYSICS, 1994, 76 (08) :4467-4471

[6] ARE MODULATIONS OF THE SCHOTTKY SURFACE-BARRIER THE ONLY EXPLANATION FOR THE GAS-SENSING EFFECTS IN SINTERED SNO2 [J].

IONESCU, R ;

MOISE, C ;

VANCU, A .

APPLIED SURFACE SCIENCE, 1995, 84 (03) :291-297

[7] ANALYSIS OF THE CHANGE IN THE CARRIER CONCENTRATION OF SAO(2) THIN-FILM GAS SENSOR [J].

KANAMORI, M ;

SUZUKI, E ;

OHYA, Y ;

TAKAHASHI, Y .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1994, 33 (12A) :6680-6683

[8]

KANOMORI M, 1995, J CERAM SOC JPN, V103, P113

[9] THE EFFECT OF MICROSTRUCTURE ON THE HEIGHT OF POTENTIAL-ENERGY BARRIERS IN POROUS TIN DIOXIDE GAS SENSORS [J].

ROMPPAINEN, P ;

LANTTO, V .

JOURNAL OF APPLIED PHYSICS, 1988, 63 (10) :5159-5165

[10] PROPERTIES OF SNO2-BASED CERAMICS [J].

SAHAR, MR ;

HASBULLAH, M .

JOURNAL OF MATERIALS SCIENCE, 1995, 30 (20) :5304-5306

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