Transport Properties of Bulk Thermoelectrics—An International Round-Robin Study, Part I: Seebeck Coefficient and Electrical Resistivity

Wang, Hsin; Porter, Wallace D.; Böttner, H.; König, Jan; Chen, Lidong; Bai, Shengqiang; Tritt, Terry M.; Mayolet, Alex; Senawiratne, J.; Smith, Charlene M.; Harris, Fred R.; Gilbert, Patricia; Sharp, Jeff; Lo, Jason; Kleinke, Holger; Kiss, László I.

doi:10.1007/s11664-012-2396-8

Cited by 121 publications

(81 citation statements)

References 47 publications

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“…The measuring error of resistivity for the Bi 2 Te 3 materials from batch to batch is possibly another cause for the resistance gap. 7 The DT loss between junctions and the ceramic plate in the test contributes greatly to the reduced open-circuit voltage. For the heat flow in Fig.…”

Section: Testing and Modeling Of A Bi 2 Te 3 Teg Modulementioning

confidence: 99%

Three-Dimensional Finite-Element Simulation for a Thermoelectric Generator Module

Takazawa

Nagase

et al. 2015

Journal of Elec Materi

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A three-dimensional closed-circuit numerical model of a thermoelectric generator (TEG) module has been constructed with COMSOL Ò Multiphysics to verify a module test system. The Seebeck, Peltier, and Thomson effects and Joule heating are included in the thermoelectric conversion model. The TEG model is employed to simulate the operation of a 16-leg TEG module based on bismuth telluride with temperature-dependent material properties. The module is mounted on a test platform, and simulated by combining the heat conduction process and thermoelectric conversion process. Simulation results are obtained for the terminal voltage, output power, heat flow, and efficiency as functions of the electric current; the results are compared with measurement data. The Joule and Thomson heats in all the thermoelectric legs, as functions of the electric current, are calculated by finite-element volume integration over the entire legs. The Peltier heat being pumped at the hot side and released at the cold side of the module are also presented in relation to the electric current. The energy balance relations between heat and electricity are verified to support the simulation.

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Section: Testing and Modeling Of A Bi 2 Te 3 Teg Modulementioning

confidence: 99%

Three-Dimensional Finite-Element Simulation for a Thermoelectric Generator Module

Takazawa

Nagase

et al. 2015

Journal of Elec Materi

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“…Typical measurement uncertainties were $6% in Seebeck coefficient, $8% in electrical resistivity, and $10% in thermal diffusivity. 25,30 Using a simple uncertainty propagation method, 25 the uncertainty in ZT was approximately 15%. Therefore, the ZTs of three different samples were not significantly different in the temperature range involved in this study ( Fig.…”

mentioning

confidence: 99%

Thermoelectric and mechanical properties of multi-walled carbon nanotube doped Bi0.4Sb1.6Te3 thermoelectric material

Ren¹,

Wang²,

A³

et al. 2013

Applied Physics Letters

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Since many thermoelectrics are brittle in nature with low mechanical strength, improving their mechanical properties is important to fabricate devices such as thermoelectric power generators and coolers. In this work, multiwalled carbon nanotubes (CNTs) were incorporated into polycrystalline Bi0.4Sb1.6Te3 through powder processing, which increased the flexural strength from 32 MPa to 90 MPa. Electrical and thermal conductivities were both reduced in the CNT containing materials, leading to unchanged figure of merit. Dynamic Young's and shear moduli of the composites were lower than the base material, while the Poisson's ratio was not affected by CNT doping.

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“…Table IV shows the maximum output power per square millimeter of the module compared to commercially available TEGs. 3 ) 40.1 9 44.7 9 3.6 40 9 40 9 4.5 10 9 8 9 2.9…”

Section: Discussionmentioning

confidence: 99%

“…The analysis of the temperature dependence of the parameters of bismuth telluride thermoelectric material (electrical conductivity and Seebeck coefficient) carried out in an international round robin study 3 shows that both the Seebeck coefficient and the electrical conductivity tend to fall with increasing temperature. The Seebeck coefficient S(T) and the normalized electrical resistance R(T) of bismuth telluride alloys were used to calculate the output power.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Thermoelectric Parameters of Bi2Te3: TEGs Assembled using Pressure-Assisted Silver Powder Sintering-Based Joining Technology

Stranz

Waag

Peiner

2015

Journal of Elec Materi

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Operation of thermoelectric generator (TEG) modules based on bismuth telluride alloys at temperatures higher than 250°C is mostly limited by the melting point of the assembly solder. Although the thermoelectric parameters of bismuth telluride materials degrade for temperatures >130°C, the power output of the module can be enhanced with an increase in the temperature difference. For this, a temperature-stable joining technique, especially for the hot side of the modules, is required. Fabrication and process parameters of TEG modules consisting of bismuth telluride legs, alumina ceramics and copper interconnects using a joining technique based on pressure-assisted silver powder sintering are described. Measurements of the thermal force, electrical resistance, and output power are presented that were performed for hot side module temperatures up to 350°C and temperature differences higher than 300°C. Temperature cycling and results measured during extended hightemperature operation are addressed.

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Transport Properties of Bulk Thermoelectrics—An International Round-Robin Study, Part I: Seebeck Coefficient and Electrical Resistivity

Cited by 121 publications

References 47 publications

Three-Dimensional Finite-Element Simulation for a Thermoelectric Generator Module

Three-Dimensional Finite-Element Simulation for a Thermoelectric Generator Module

Thermoelectric and mechanical properties of multi-walled carbon nanotube doped Bi0.4Sb1.6Te3 thermoelectric material

Investigation of Thermoelectric Parameters of Bi2Te3: TEGs Assembled using Pressure-Assisted Silver Powder Sintering-Based Joining Technology

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