Tuning of the electrical conductivity of Sr(Ti,Fe)O3 oxygen sensing films by aerosol co-deposition with Al2O3

被引：39

作者：

Exner, Joerg ^{[1
]}

Schubert, Michael ^{[1
]}

Hanft, Dominik ^{[1
]}

Stoecker, Thomas ^{[1
]}

Fuierer, Paul ^{[2
]}

Moos, Ralf ^{[1
]}

机构：

[1] Univ Bayreuth, Dept Funct Mat, Univ Str 30, D-95440 Bayreuth, Germany

[2] New Mexico Inst Min & Technol, Mat & Met Engn Dept, Socorro, NM 87801 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2016年 / 230卷

关键词：

Room temperature impact consolidation (RTIC); Aerosol co-deposition; Resistive oxygen sensor; Strontium titanate ferrate (STF); DEPOSITION METHOD; ROOM-TEMPERATURE; GAS SENSOR; THICK; FABRICATION; PARTICLES; COATINGS; POWDER; GROWTH;

D O I：

10.1016/j.snb.2016.02.033

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Iron -substituted strontium titanate Sr(Ti,Fe)O-3 (STF) is a semiconducting oxygen sensing ceramic, and features a temperature independent conductivity at temperatures between 700 and 800 degrees C for the composition SrTi0.65Fe0.35O3-delta (STF35). Aerosol deposition (AD) offers advantages as a means of producing thick films of this sensor material. In this work, aerosol co -deposition of ceramics (AcDc) was used to tune the functional properties of STF35 by incorporating alumina particles directly. Composite films of STF35:Al2O3 with homogeneously distributed particle fractions were successfully deposited by AcDc. The conductivity of films was tunable over an order of magnitude with up to 60 volume percent alumina, and the temperature independent oxygen sensing behavior, as observed in bulk ceramics, was retained. Higher percentages of alumina decreased the conductivity further (up to four orders of magnitude) but the sensor response characteristic to oxygen disappeared. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：427 / 433

页数：7

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