A high temperature apparatus for measurement of the Seebeck coefficient

Iwanaga, Shiho; Toberer, Eric S.; LaLonde, Aaron D.; Snyder, G. Jeffrey

doi:10.1063/1.3601358

Cited by 279 publications

(226 citation statements)

References 16 publications

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“…Electrical resistivity and Seebeck coefficient measurement at Tsinghua University were performed simultaneously on a ZEM‐2 apparatus (ULVAC‐RIKO, Japan) from 323 to 573 K in a helium atmosphere. Hall coefficient ( R H ) measurement at Tsinghua University was conducted using the Hall measurement system (ResiTest 8340DC, Toyo, Japan) from 323 to 573 K. Seebeck coefficient measurements at Northwestern University were carried out under high vacuum with a home‐built instrument by using Chromel–Nb thermocouples 50. Hall coefficients and resistivity (Van der Pauw, 4‐point probe) were also measured simultaneously at Northwestern University using a 2 T magnet with pressure‐assisted Molybdenum contacts 51.…”

Section: Methodsmentioning

confidence: 99%

Self‐Tuning n‐Type Bi₂(Te,Se)₃/SiC Thermoelectric Nanocomposites to Realize High Performances up to 300 °C

et al. 2017

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Bi2Te3 thermoelectric materials are utilized for refrigeration for decades, while their application of energy harvesting requires stable thermoelectric and mechanical performances at elevated temperatures. This work reveals that a steady zT of ≈0.85 at 200 to 300 °C can be achieved by doping small amounts of copper iodide (CuI) in Bi2Te2.2Se0.8–silicon carbide (SiC) composites, where SiC nanodispersion enhances the flexural strength. It is found that CuI plays two important roles with atomic Cu/I dopants and CuI precipitates. The Cu/I dopants show a self‐tuning behavior due to increasing solubility with increasing temperatures. The increased doping concentration increases electrical conductivity at high temperatures and effectively suppresses the intrinsic excitation. In addition, a large reduction of lattice thermal conductivity is achieved due to the “in situ” CuI nanoprecipitates acting as phonon‐scattering centers. Over 60% reduction of bipolar thermal conductivity is achieved, raising the maximum useful temperature of Bi2Te3 for substantially higher efficiency. For module applications, the reported materials are suitable for segmentation with a conventional ingot. This leads to high device ZT values of ≈0.9–1.0 and high efficiency up to 9.2% from 300 to 573 K, which can be of great significance for power generation from waste heat.

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Section: Methodsmentioning

confidence: 99%

Self‐Tuning n‐Type Bi₂(Te,Se)₃/SiC Thermoelectric Nanocomposites to Realize High Performances up to 300 °C

et al. 2017

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“…25 The Seebeck coefficients were measured using chromel-Nb thermocouples by allowing the temperature gradient across the sample to oscillate between ±10 K, as described in ref. 26. A Netzch LFA 457 was used to measure the thermal diffusivity.…”

Section: Characterizationmentioning

confidence: 99%

Thermoelectric Properties and Electronic Structure of the Zintl‐Phase Sr₃AlSb₃

et al. 2013

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The Zintl phase Sr 5 Al 2 Sb 6 has a large, complex unit cell and is composed of relatively earth-abundant and non-toxic elements, making it an attractive candidate for thermoelectric applications. The structure of Sr 5 Al 2 Sb 6 is characterized by infinite oscillating chains of AlSb 4 tetrahedra. It is distinct from the structure type of the previously studied Ca 5 M 2 Sb 6 compounds (M = Al, Ga or In), all of which have been shown to have promising thermoelectric performance. The lattice thermal conductivity of Sr 5 Al 2 Sb 6 (∼0.55 W mK −1 at 1000 K) was found to be lower than that of the related Ca 5 M 2 Sb 6 compounds due to its larger unit cell (54 atoms per primitive cell). Density functional theory predicts a relatively large band gap in Sr 5 Al 2 Sb 6 , in agreement with the experimentally determined band gap of E g ∼ 0.5 eV. High temperature electronic transport measurements reveal high resistivity and high Seebeck coefficients in Sr 5 Al 2 Sb 6 , consistent with the large band gap and valence-precise structure. Doping with Zn 2+ on the Al 3+ site was attempted, but did not lead to the expected increase in carrier concentration. The low lattice thermal conductivity and large band gap in Sr 5 Al 2 Sb 6 suggest that, if the carrier concentration can be increased, thermoelectric performance comparable to that of Ca 5 Al 2 Sb 6 could be achieved in this system.

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“…75 Cross-plane Seebeck coefficient at different temperatures was measured under oscillating temperatures with Chromel-Nb thermocouples. 76 Thermal conductivity was calculated as k ¼ dD T C p , with the thermal diffusivity D T measured along the cross-plane direction by the laser ash method (Netzsch LFA 457) under Argon ow using the Cowan model plus pulse correction. The heat capacity C p was determined using the equation C p /k B atom À1 ¼ 3.07 + 4.7 Â 10 À4 (T/K-300) by tting high quality measurement results.…”

Section: Experimental Methodsmentioning

confidence: 99%

Thermoelectric alloys between PbSe and PbS with effective thermal conductivity reduction and high figure of merit

Wang

Cao

et al. 2014

J. Mater. Chem. A

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The n-type alloys between PbSe and PbS are studied. The effect of alloy composition on transport properties is evaluated and the results are interpreted with theories based on random atomic site substitution. The alloying in PbSe 1Àx S x brings thermal conductivity reduction, carrier mobility reduction as well as change of effective mass. When all these factors are evaluated, both experimentally and theoretically, the optimized thermoelectric performance is found to change gradually with alloy composition. High zT can be found in all PbSe 1Àx S x alloys. The possibility of achieving significant improvement of zT through alloying is also discussed.

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A high temperature apparatus for measurement of the Seebeck coefficient

Cited by 279 publications

References 16 publications

Self‐Tuning n‐Type Bi₂(Te,Se)₃/SiC Thermoelectric Nanocomposites to Realize High Performances up to 300 °C

Self‐Tuning n‐Type Bi₂(Te,Se)₃/SiC Thermoelectric Nanocomposites to Realize High Performances up to 300 °C

Thermoelectric Properties and Electronic Structure of the Zintl‐Phase Sr₃AlSb₃

Thermoelectric alloys between PbSe and PbS with effective thermal conductivity reduction and high figure of merit

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A high temperature apparatus for measurement of the Seebeck coefficient

Cited by 279 publications

References 16 publications

Self‐Tuning n‐Type Bi2(Te,Se)3/SiC Thermoelectric Nanocomposites to Realize High Performances up to 300 °C

Self‐Tuning n‐Type Bi2(Te,Se)3/SiC Thermoelectric Nanocomposites to Realize High Performances up to 300 °C

Thermoelectric Properties and Electronic Structure of the Zintl‐Phase Sr3AlSb3

Thermoelectric alloys between PbSe and PbS with effective thermal conductivity reduction and high figure of merit

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Self‐Tuning n‐Type Bi₂(Te,Se)₃/SiC Thermoelectric Nanocomposites to Realize High Performances up to 300 °C

Self‐Tuning n‐Type Bi₂(Te,Se)₃/SiC Thermoelectric Nanocomposites to Realize High Performances up to 300 °C

Thermoelectric Properties and Electronic Structure of the Zintl‐Phase Sr₃AlSb₃