High‐Temperature Microsensors

Gerblinger, J.; Haerdtl, K. H.; Meixner, H.; Aigner, Robert

doi:10.1002/9783527620180.ch6

Cited by 9 publications

(5 citation statements)

References 49 publications

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“…It is well known that the perovskites are chemically stable compounds even at high temperatures and can tolerate large levels of dopants without phase transformations. 1 The electronic properties of the parent material can be tailored by adding appropriate dopants that exhibit different valence states. 2 Generally, A-site (alkaline earth metals) dopants contribute to ionic conduction and B-site (transition metals) dopants contribute to electronic conduction.…”

mentioning

confidence: 99%

Behavior of Ytterbium in Calcium and Strontium Zirconate Matrices

Bootharajan

Rao

Kumar

et al. 2017

ECS J. Solid State Sci. Technol.

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mentioning

confidence: 99%

Behavior of Ytterbium in Calcium and Strontium Zirconate Matrices

Bootharajan

Rao

Kumar

et al. 2017

ECS J. Solid State Sci. Technol.

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“…So, oxygen sensors should have high thermal and mechanical stabilities. 6,7 Also, oxygen sensors should have high specic surface area to secure high density of surface active sites. A great deal of research have been carried out to improve the properties of oxygen sensors such as nanostructured CeO x and InO x .…”

Section: Introductionmentioning

confidence: 99%

“…6,7 The characteristics and applications of SrTiO 3 have been comprehensively studied over the past few decades. The electrical conductivities of SrTiO 3 can be easily controlled by selecting different doping donors, such as La, Nb, and Fe.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of the O₂ gas sensing properties of mesoporous Sr_0.9La_0.1TiO₃ films by increasing the pore connectivity

2015

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The structural and gas sensing properties of mesoporous Sr 0.9 La 0.1 TiO 3 films for oxygen sensing applications were investigated as a function of surfactant concentration. Through the synthesis of Sr 0.9 La 0.1 TiO 3 with a mesoporous structure, the surface area and pore connectivity were increased by increasing the surfactant concentration. Using a thermal treatment, interior pores were exposed to the surface thereby increasing the surface area. This increase in surface area induces an increase in oxygen absorption, which results in an enhanced oxygen sensitivity. The oxygen sensing properties of mesoporous Sr 0.9 La 0.1 TiO 3 films were analyzed at an oxygen concentration of 30% and an analysis temperature of 550 C. The results at these conditions showed the maximum oxygen sensitivity (9.43), response time (38 s), and recovery time (181 s). The inclusion of a surfactant during the preparation of mesoporous films was found to be a simple and effective method to enhance the surface area and interior pore connectivity of the films to enhance their gas sensing performance.

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“…In addition, the voltage width values of limiting current are within the range of 0.5−2.0 V for x ≥ 0.2, compared to the values for sensors based on YSZ with gas diffusion holes. 14 The concept behind this phenomenon implies that AgNb 1−x Ti x O 3−δ is stable electrochemically. Furthermore, the sensor response steadily increases when the Ti-doping amount increases.…”

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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High‐Temperature Microsensors

Cited by 9 publications

References 49 publications

Behavior of Ytterbium in Calcium and Strontium Zirconate Matrices

Behavior of Ytterbium in Calcium and Strontium Zirconate Matrices

Enhancement of the O₂ gas sensing properties of mesoporous Sr_0.9La_0.1TiO₃ films by increasing the pore connectivity

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

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High‐Temperature Microsensors

Cited by 9 publications

References 49 publications

Behavior of Ytterbium in Calcium and Strontium Zirconate Matrices

Behavior of Ytterbium in Calcium and Strontium Zirconate Matrices

Enhancement of the O2 gas sensing properties of mesoporous Sr0.9La0.1TiO3 films by increasing the pore connectivity

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

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Enhancement of the O₂ gas sensing properties of mesoporous Sr_0.9La_0.1TiO₃ films by increasing the pore connectivity

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