BaFe1-xTaxO3-δ – A material for temperature independent resistive oxygen sensors

Bektaş, Murat; Schönauer-Kamin, Daniela; Hagen, Gunter; Mergner, Angelika; Bojer, Carina; Lippert, Sonja; Milius, Wolfgang; Breu, Josef; Moos, Ralf

doi:10.1016/j.snb.2013.07.106

Cited by 24 publications

(18 citation statements)

References 38 publications

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“…4b. Similar results were observed for BFT30 bulk samples between 500 and 900 • C in our previous study (Bektas et al, 2014). It can be seen from Fig.…”

Section: Oxygen Sensing Propertiessupporting

confidence: 91%

“…Only below 700 • C, the sensor becomes temperature dependent. According to Bektas et al (2014), the increasing tantalum content reduces the amount of oxygen vacancies. The oxygen deficiency, δ, moves from 0.5 towards zero.…”

Section: Oxygen Sensing Propertiesmentioning

confidence: 99%

“…Moseley and Williams (1989) suggested BaFe 0.8 Ta 0.2 O 3−δ as a temperature-independent oxygen sensor material. In our previous study, the oxygen sensing properties of bulk ceramic samples of the entire series of BaFe 1−x Ta x O 3−δ (BFT) with 0.2 ≤ x ≤ 0.7 were investigated as a function of pO 2 and temperature between 400 and 900 • C (Bektas et al, 2014). The conductivity of BaFe 0.7 Ta 0.3 O 3−δ (BFT30) responds rapidly and reproducibly to oxygen partial pressure changes, and it shows a negligible temperature dependency between 800 and 900 • C.…”

Section: Introductionmentioning

confidence: 99%

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Aerosol-deposited BaFe0.7Ta0.3O3-δ for nitrogen monoxide and temperature-independent oxygen sensing

Bektaş

Hanft

Schönauer-Kamin

et al. 2014

J. Sens. Sens. Syst.

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Abstract. The gas sensing properties of resistive gas sensors of BaFe0.7Ta0.3O3-δ (BFT30) prepared by the so-called aerosol deposition method, a method to manufacture dense ceramic films at room temperature, were investigated. The electrical response of the films was investigated first under various oxygen concentrations and in a wide temperature range between 350 and 900 °C. Between 700 and 900 °C, the conductivity of BaFe0.7Ta0.3O3-δ (BFT30) depends on the oxygen concentration with a slope of almost 1/4 in the double-logarithmic plot vs. oxygen partial pressure. In addition, the sensor response is temperature independent. BFT30 responds fast and reproducibly to changing oxygen partial pressures even at 350 °C. The cross-sensitivity has been investigated in environments with various gases (C3H8, NO, NO2, H2, CO, CO2, and H2O) in synthetic air between 350 and 800 °C. BFT30 exhibits good sensing properties to NO between 350 and 400 °C in the range from 1.5 to 2000 ppm with a high selectivity to the other investigated gas species. Thus this semiconducting ceramic material is a good candidate for a temperature-independent oxygen sensor at high temperatures with the application in exhausts and for a selective nitrogen monoxide (NO) sensor at low temperatures for air quality monitoring.

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“…4b. Similar results were observed for BFT30 bulk samples between 500 and 900 • C in our previous study (Bektas et al, 2014). It can be seen from Fig.…”

Section: Oxygen Sensing Propertiessupporting

confidence: 91%

Section: Oxygen Sensing Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Aerosol-deposited BaFe0.7Ta0.3O3-δ for nitrogen monoxide and temperature-independent oxygen sensing

Bektaş

Hanft

Schönauer-Kamin

et al. 2014

J. Sens. Sens. Syst.

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“…By 2014, it reached 154 million vehicles, and by May 2015, it had more than 162 million vehicles [21]. Since 2010, the average annual growth rate of car ownership in the country has exceeded 15% [1][2][3].A large number of cars provide convenience for people's life. At the same time, it also brings many negative effects, such as traffic accidents, energy consumption, exhaust gas and noise pollution.…”

Section: The Analysis and Research For The Plate Differential Oxygen mentioning

confidence: 99%

The Analysis and Research for the Plate Differential Oxygen Gas Sensor of Auto Based on the Temperature Field and Thermal Stress Field

2017

IJOMAM

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Abstract-The purpose of this paper is to study the oxygen field sensor based on the temperature field and the thermal field. By using cerium -zirconium oxygen storage material as the oxygen partial pressure reference layer, the multi -layer structure of flat -type concentration oxygen sensor was designed. The finite element model of the sensor is established. Thermal conductivity and thermal stress analysis of 8YSZ and 3YSZ different electrolyte sensors were carried out respectively. The results show that the sensor reaches the response temperature above 300 ℃ at t = 5s. When the sensor is stable, the temperature of the sensitive area is about 800 ℃. At the same time, it shows consistency in the thickness direction. The thermal stress of each layer of the sensor increases with increasing temperature. When the sensor is stable, it reaches its maximum value. However, they are less than the breaking strength of each material. Based on the above findings, we conclude that the plate type concentration oxygen sensor based on temperature field and thermal field has the advantages of fast response time and reliable performance.

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“…negligible temperature dependency of the resistance, such as La 2 CuO 4 (Blase et al, 1997), LaFe 0.8 Cu 0.2 O 3 (Sahner et al, 2006), La 0.05 Sr 0.05 Ti 0.65 Fe 0.35 O 3−δ (LSTF) (Moos et al, 2003), SrTi 0.65 Fe 0.35 O 3−δ (STF35) (Rothschild et al, 2005), and BaFe 1−x Ta x O 3−δ (BFT) (Moseley and Williams, 1989).…”

Section: Introductionmentioning

confidence: 99%

Combined resistive and thermoelectric oxygen sensor with almost temperature-independent characteristics

Bektaş

Stöcker

Mergner

et al. 2018

J. Sens. Sens. Syst.

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Abstract. The present study is focused in two directions. In the first part, BaFe(1-x)-0.01Al0.01TaxO3−δ (BFATx) thick films with a Ta content between 0.1 and 0.4 were manufactured using the novel room temperature coating method “aerosol deposition” (ADM), and its material properties were characterized to find the best composition of BFATx for temperature-independent oxygen sensors. The material properties “Seebeck coefficient” and “conductivity” were determined between 600 and 800 ∘C at different oxygen partial pressures. BaFe0.69Al0.01Ta0.3O3−δ (BFAT30) was found out to be very promising due to the almost temperature-independent behavior of both the conductivity and the Seebeck coefficient. In the second part of this study, films of BFAT30 were prepared on a special transducer that includes a heater, equipotential layers, and special electrode structures so that a combined direct thermoelectric/resistive oxygen sensor of BFAT30 with almost temperature-independent characteristics of both measurands, Seebeck coefficient and conductance could be realized. At high oxygen partial pressures (pO2 > 10−5 bar), the electrical conductance of the sensor shows an oxygen sensitivity of m = 0.24 (with m being the slope in the logσ vs. logpO2 representation according to the behavior of σαpO2m), while the Seebeck coefficient changes with a slope of −38 µV K−1 per decade of pO2 at 700 ∘C. However, at low pO2 (pO2 < 10−14 bar) the conductance and the Seebeck coefficient change with pO2, with a slope of m = −0.23 and −21.2 µV K−1 per decade pO2, respectively.

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BaFe1-xTaxO3-δ – A material for temperature independent resistive oxygen sensors

Cited by 24 publications

References 38 publications

Aerosol-deposited BaFe<sub>0.7</sub>Ta<sub>0.3</sub>O<sub>3-δ</sub> for nitrogen monoxide and temperature-independent oxygen sensing

Aerosol-deposited BaFe<sub>0.7</sub>Ta<sub>0.3</sub>O<sub>3-δ</sub> for nitrogen monoxide and temperature-independent oxygen sensing

The Analysis and Research for the Plate Differential Oxygen Gas Sensor of Auto Based on the Temperature Field and Thermal Stress Field

Combined resistive and thermoelectric oxygen sensor with almost temperature-independent characteristics

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BaFe1-xTaxO3-δ – A material for temperature independent resistive oxygen sensors

Cited by 24 publications

References 38 publications

Aerosol-deposited BaFe&lt;sub&gt;0.7&lt;/sub&gt;Ta&lt;sub&gt;0.3&lt;/sub&gt;O&lt;sub&gt;3-δ&lt;/sub&gt; for nitrogen monoxide and temperature-independent oxygen sensing

Aerosol-deposited BaFe&lt;sub&gt;0.7&lt;/sub&gt;Ta&lt;sub&gt;0.3&lt;/sub&gt;O&lt;sub&gt;3-δ&lt;/sub&gt; for nitrogen monoxide and temperature-independent oxygen sensing

The Analysis and Research for the Plate Differential Oxygen Gas Sensor of Auto Based on the Temperature Field and Thermal Stress Field

Combined resistive and thermoelectric oxygen sensor with almost temperature-independent characteristics

Contact Info

Product

Resources

About

Aerosol-deposited BaFe<sub>0.7</sub>Ta<sub>0.3</sub>O<sub>3-δ</sub> for nitrogen monoxide and temperature-independent oxygen sensing

Aerosol-deposited BaFe<sub>0.7</sub>Ta<sub>0.3</sub>O<sub>3-δ</sub> for nitrogen monoxide and temperature-independent oxygen sensing