Limiting current and wide range air/fuel ratio sensors using the same YSZA12O3 layers as electrolyte and diffusion barrier

Lee, Jong Heun; Kwon, Chang Soon; Kim, Hoin; Kim, Byung Ki

doi:10.1016/s0925-4005(97)80082-2

Cited by 17 publications

(6 citation statements)

References 11 publications

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“…This probably explains why the current levels are higher with the reverse bias and why the sensitivity to oxygen decreases for concentrations larger than 1%. As shown by Lee et al [17], the increase of the current levels leads to a shift of the limiting current plateaux towards higher voltages (figure 7) and to a decrease of the range of proportionality between the height of the plateaux and the oxygen content. Consequently, the I (V ) curves approximately look like figure 7(a) when the sensor is directly biased and like figure 7(b) when it is reverse biased.…”

Section: Discussionmentioning

confidence: 59%

Nitrogen-monoxide sensing with a commercial zirconia lambda gauge biased in amperometric mode

Coillard

Juste

Lucat

et al. 2000

Meas. Sci. Technol.

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One of the most promising principles for NO sensing in automotive exhaust gases today relies on amperometric sensors based on zirconia. The fact that materials at present used in potentiometric lambda oxygen gauges are very reliable in exhaust gases led us to mount such a gauge amperometrically. Apart from the good stability of the current levels, the investigation of a Bosch LSH6-type gauge showed that its sensitivity to NO was comparable to its sensitivity to oxygen when the external spinel-coated electrode was used as the cathode (direct bias). The disappearance of this sensitivity with a reverse bias demonstrates that MgAl2 O4 plays a key role in the catalytic dissociation of nitrogen monoxide.

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Section: Discussionmentioning

confidence: 59%

Nitrogen-monoxide sensing with a commercial zirconia lambda gauge biased in amperometric mode

Coillard

Juste

Lucat

et al. 2000

Meas. Sci. Technol.

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“…Due to its non-porous structure, it avoids the problems of small hole blockage and porous signal drift. Therefore, this sensor has fast response to oxygen and long service life ， the test accuracy is relatively high [1][2][3][4]. The diffusion barrier materials used are mainly composed of single-phase or multiphase mixed conductor materials, such as Mg, Fe, Sr doped LaGaO3 or LaCoO3, Fe YSZ, and Fe, Cr, Co doped CaZrO3, etc.…”

Section: The First Section In Your Papermentioning

confidence: 99%

Research on limiting current oxygen sensor based on La₂MoWO₉

Yang

et al. 2022

J. Phys.: Conf. Ser.

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In this paper, an oxygen sensor with La2MoWO9 as the base material and La0.6Sr0.4Fe0.8Co0.2O3 mixed conductor material as the diffusion barrier layer was made by solid state synthesis method. The sensor has the characteristics of low price, low working temperature, simple preparation process, and has a good application prospect. However, there is also the problem of poor stability, which needs to be further studied.

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“…As a result, the limiting current signal and oxygen levels are then found to have a nonlinear relationship, especially for high oxygen concentrations . Slower oxygen ion transport in materials that exhibit mixed oxide and electron conductivity results in a direct correlation between the limiting current and oxygen content. , The use of materials that combine oxide ion or electron properties as a barrier to diffusion has been widely employed for oxygen sensors. − The issue of porosity in a diffused barrier may be resolved by using the hybrid electron–ion conductive solid substances as a barrier to diffusion since they have specific oxygen diffusion characteristics.…”

Section: Introductionmentioning

confidence: 99%

Ti-Doped AgNbO₃ as Novel Dense Diffusion Barriers of Limiting Current Oxygen Sensors

Shan,

Dastan,

Zhang

et al. 2024

Langmuir

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The oxygen sensors with limiting current derived from a dense diffusion barrier have an excellent advantage of detecting oxygen partial pressure by controlling the ratio of air and fuel in combustion environments. Therefore, AgNb 1−x Ti x O 3−δ (wherein x varies from 0.1 to 0.3) was prepared as such a dense diffusion barrier layer for sensor application. Among the investigated compositions as a new condensed barrier for the diffusion of sensors, AgNb 1−x Ti x O 3−δ (x = 0.1, 0.2, 0.3) exhibits oxygen ionic conductivities from 1.37 × 10 −4 to 5.78 × 10 −3 S•cm −1 in the temperature range of 600−900 °C and outstanding stable electrochemical properties. Herein, we employ these novel materials as dense diffusion barriers and 8 mol % zirconia stabilized by yttria (8YSZ) as a solid-state electrolyte for the fabrication of the oxygen sensors with limiting current. We observed a direct connection between the limiting current and oxygen content within the interval of 0.5−5.0 mol % at 800 °C and a low working voltage. The increase of Ti-doping amount in AgNbO 3 accelerates the sensing response to oxygen gas and promotes the service life of the sensor.

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Limiting current and wide range air/fuel ratio sensors using the same YSZA12O3 layers as electrolyte and diffusion barrier

Cited by 17 publications

References 11 publications

Nitrogen-monoxide sensing with a commercial zirconia lambda gauge biased in amperometric mode

Nitrogen-monoxide sensing with a commercial zirconia lambda gauge biased in amperometric mode

Research on limiting current oxygen sensor based on La₂MoWO₉

Ti-Doped AgNbO₃ as Novel Dense Diffusion Barriers of Limiting Current Oxygen Sensors

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Limiting current and wide range air/fuel ratio sensors using the same YSZA12O3 layers as electrolyte and diffusion barrier

Cited by 17 publications

References 11 publications

Nitrogen-monoxide sensing with a commercial zirconia lambda gauge biased in amperometric mode

Nitrogen-monoxide sensing with a commercial zirconia lambda gauge biased in amperometric mode

Research on limiting current oxygen sensor based on La2MoWO9

Ti-Doped AgNbO3 as Novel Dense Diffusion Barriers of Limiting Current Oxygen Sensors

Contact Info

Product

Resources

About

Research on limiting current oxygen sensor based on La₂MoWO₉

Ti-Doped AgNbO₃ as Novel Dense Diffusion Barriers of Limiting Current Oxygen Sensors