The use of elemental thermocouples in high-temperature precision thermometry

Bentley, R E

doi:10.1016/s0263-2241(98)00007-4

Cited by 46 publications

(60 citation statements)

References 11 publications

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“…We find that the Seebeck coefficient increases as T 1/3 upto 225 K. Beyond 225 K, the fit deviates due to effects of thermally generated charge carriers 45 . In the whole temperature range the sign of Seebeck coefficient was negative.…”

Section: Resultsmentioning

confidence: 81%

Electron and thermal transport via variable range hopping in MoSe2 single crystals

Suri

Patel

2017

Applied Physics Letters

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Section: Resultsmentioning

confidence: 81%

Electron and thermal transport via variable range hopping in MoSe2 single crystals

Suri

Patel

2017

Applied Physics Letters

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“…The measured sensor signal was offset corrected and converted to the corresponding temperature signal. Since a gold/platinum thermocouple was screen printed, a Seebeck coefficient of about 19 µV K −1 (according to the here-used sensor temperatures) must be applied (Bentley, 1998). Then, the linear correlation between temperature difference and analyte concentration can be seen for different overall sensor temperatures in Fig.…”

Section: Results For Stationary Conditionsmentioning

confidence: 99%

Simulation of a thermoelectric gas sensor that determines hydrocarbon concentrations in exhausts and the light-off temperature of catalyst materials

Ritter

Wiegärtner

Hagen

et al. 2017

J. Sens. Sens. Syst.

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Abstract. Catalyst materials can be characterized with a thermoelectric gas sensor. Screen-printed thermopiles measure the temperature difference between an inert part of the planar sensor and a part that is coated with the catalyst material to be analyzed. If the overall sensor temperature is modulated, the catalytic activity of the material can be varied. Exothermic reactions that occur at the catalyst layer cause a temperature increase that can then be measured as a sensor voltage due to the Seebeck coefficient of the thermopiles. This mechanism can also be employed at stationary conditions at constant sensor temperature to measure gas concentrations. Then, the sensor signal changes linearly with the analyte concentration. Many variables influence the sensing performance, for example, the offset voltage due to asymmetric inflow and the resulting inhomogeneous temperature distributions are an issue. For even better understanding of the whole sensing principle, it is simulated in this study by a 3-D finite element model. By coupling all influencing physical effects (fluid flow, gas diffusion, heat transfer, chemical reactions, and electrical properties) a model was set up that is able to mirror the sensor behavior precisely, as the comparison with experimental data shows. A challenging task was to mesh the geometry due to scaling problems regarding the resolution of the thin catalyst layer in the much larger gas tube. Therefore, a coupling of a 3-D and a 1-D geometry is shown. This enables to calculate the overall temperature distribution, fluid flow, and gas concentration distribution in the 3-D model, while a very accurate calculation of the chemical reactions is possible in a 1-D dimension. This work does not only give insight into the results at stationary conditions for varying feed gas concentrations and used substrate materials but shows also how various exhaust gas species behave under transient temperature modulation.

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“…This Bi 0.3 Sb 1.7 Te 3 was sinter prepared by a hot press method. The measurement was carried out by placing the apparatus in a thermostatic chamber and the absolute Seebeck coefficient of the sample was calculated by substituting the absolute Seebeck coefficient of chromel ( [14]) used as a wire in Equation (3). Figure 6 shows the measurement results of (a) the Seebeck coefficient, (b) electrical resistivity and (c) thermal diffusivity.…”

Section: Application To Temperature Dependence Measurementmentioning

confidence: 99%

Proposal and Verification of Simultaneous Measurement Method for Three Thermoelectric Properties with Film-Type Thermocouple Probe

Yamazaki¹,

Ueno²,

Nagano³

2017

JECTC

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A new simultaneous measurement method for the measurement of the three thermoelectric properties with a film-type thermocouple probe was proposed. Seebeck coefficient was measured using the steady-state condition of the differential method. The electrical resistivity was measured using the four-probe method and the thermal diffusivity is measured using the periodic heating method. The effectiveness of the proposed method was verified using constantan as a reference material. After describing the effectiveness of the method, the measurement of three thermoelectric properties of Bi 0.3 Sb 1.7 Te 3 , which is a thermoelectric material, was performed.

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The use of elemental thermocouples in high-temperature precision thermometry

Cited by 46 publications

References 11 publications

Electron and thermal transport via variable range hopping in MoSe2 single crystals

Electron and thermal transport via variable range hopping in MoSe2 single crystals

Simulation of a thermoelectric gas sensor that determines hydrocarbon concentrations in exhausts and the light-off temperature of catalyst materials

Proposal and Verification of Simultaneous Measurement Method for Three Thermoelectric Properties with Film-Type Thermocouple Probe

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