Thermoelectric and mechanical properties of the Bi0.5Sb1.5Te3 solid solution prepared by melt spinning

Иванова, Л. Д.; Петрова, Л. И.; Granatkina, Yu. V.; Leontyev, V. G.; Иванов, А. С.; Varlamov, Sergey; Prilepo, Yu. P.; Сычев, А. М.; Чуйко, А. Г.; Башков, И. В.

doi:10.1134/s0020168513020106

Cited by 31 publications

(14 citation statements)

References 9 publications

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“…In these prior investigations, the melt-spinning technique was shown to produce homogeneous ribbons with identical electrical properties although the intrinsic properties of the carriers (concentration and mobility) are different from those of the bulk SPS samples. The excellent reproducibility of the transport properties in Bi 0.48 Sb 1.52 Te 3 ribbons observed herein thus confirms the conclusions drawn for analogous compounds [43][44][45][46][47][48][49]60]. Finally, it should be kept in mind that the electronic properties of mixed crystals based on Sb 2 Te 3 -Bi 2 Te 3 are governed by native defects, the influence of which outweighs the role of differences in the microstructure of the samples.…”

Section: Transport Propertiessupporting

confidence: 87%

“…This technique has also been the subject of studies from a mathematical point of view [36]. Recently, this technique combined with subsequent hot pressing was employed successfully by several groups to achieve high thermoelectric performance with peak ZT values of 1.5 around 300 K in p-type Bi x Sb 2−x Te 3 for 0.48 ≤ x ≤ 0.52 [37][38][39][40][41][42][43]. Because melt-spun ribbons are subsequently consolidated to obtain bulk dense specimens, a detailed investigation of their microstructure-properties relationships is essential to better understand the influence of the MS process on the thermoelectric properties of Bi 2 Te 3 -based materials.…”

Section: Introductionmentioning

confidence: 99%

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Structural and Electrical Properties Characterization of Sb1.52Bi0.48Te3.0 Melt-Spun Ribbons

et al. 2017

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Melt-spinning (MS) has been reported as a promising tool to tailor the microstructure of bulk thermoelectric materials leading to enhanced thermoelectric performances. Here, we report on a detailed characterization of p-type Bi 0.48 Sb 1.52 Te 3 ribbons produced by melt-spinning. The microstructure of the melt-spun ribbons has been studied by means of X-ray diffraction, scanning and transmission electron microscopy (TEM). The analyses indicate that the ribbons are highly-textured with a very good chemical homogeneity. TEM reveals clear differences in the microstructure at large and short-range scales between the surface that was in contact with the copper wheel and the free surface. These analyses further evidence the absence of amorphous regions in the melt-spun ribbons and the precipitation of elemental Te at the grain boundaries. Low-temperature electrical resistivity and thermopower measurements (20-300 K) carried out on several randomly-selected ribbons confirm the excellent reproducibility of the MS process. However, the comparison of the transport properties of the ribbons with those of bulk polycrystalline samples of the same initial composition shows that MS leads to a more pronounced metallic character. This difference is likely tied to changes in deviations from stoichiometry due to the out-of-equilibrium conditions imposed by MS.

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Section: Transport Propertiessupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Structural and Electrical Properties Characterization of Sb1.52Bi0.48Te3.0 Melt-Spun Ribbons

et al. 2017

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“…The output parameters modeling of the TEG was performed as described in [1] for two types of engines: a powerful diesel engine TMZ 8463.10 of a lorry and a gasoline engine of a passenger car Lada Kalina (21127). While modeling, a diesel engine consisted of a low temperature material based on Bi 2 Te 3 , and a gasoline engine consisted of a medium temperature materials based on PbTe and GeTe (see Table 1) [2]. In Table 2 shown the results of modeling for viewed engines at the TEG, which had a length of 0,5 m, placement near the output collector.…”

Section: Resultsmentioning

confidence: 99%

Efficiency Assessment of Thermoelectric Generators in Heat-Insulated Combustion Engines

2015

2015 the 5th International Workshop on Computer Science and Engineering-Information Processing and Control Engineering

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In the present paper the efficiency of thermoelectric generators for different types of combustion engines was analyzed. Modeling of thermal flows through the thermoelectric generator and its output parameters at different placement from output collector of a standard and heatinsulated diesel engine was carried out. As the consequence, the perspective of the thermoelectric generators usage for heat-insulated combustion engines was shown. Thermoelectric generator for heat-insulated engine has similar physical specifications and several times as large power as compared with conventional engine. The possibility of reaching the efficiency up to 10 % of the thermoelectric generators in heat-insulated engines by augmentation of heat transmission from exhaust to the junctures of thermoelectric battery was shown.

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“…Pilchak et al characterized mechanical properties of Pb‐Sb‐Ag‐Te‐based TE material as a function of particle size, size distribution, particle morphology, and phase change. Ivanova et al studied the mechanical properties (strength and strain) of Bi 0.5 Sb 1.5 Te 3 by using nanostructuring. These properties are studied at room temperatures by using compression and bend tests.…”

Section: Technical Issues Faced In Eteg and Possible Solutionsmentioning

confidence: 99%

Thermoelectric conversion of waste heat from IC engine-driven vehicles: A review of its application, issues, and solutions

Patowary

Baruah

2018

Int J Energy Res

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Summary Thermoelectric generator (TEG) is a promising thermoelectric (TE) conversion technology to effectively recover and convert waste heat from vehicle exhaust into useful energy, ie, electricity. Exhaust TEG (ETEG) is a system that is incorporated into the exhaust manifold of a vehicle. Exhaust TEG comprises of a heat exchanger, TEG modules, heat sink, and power conditioning unit. The present work reviews different vehicular ETEGs based on engine type, engine‐rated power, type and number of TEG module, efficiency of ETEG and TEG, exhaust and coolant temperature, and power output of ETEG. In addition to these, the technical issues faced in these ETEGs are addressed under 2 categories, viz., primary (TEG with low ZT TE material and inefficient heat exchanger and heat sink) and secondary issues (low operating temperature TEG modules and installation position of ETEG). In addition to it, effects of vibration and thermal cycling of exhaust system on TEG modules that may arise in ETEG are also discussed. A review of preventive solutions to the issues is also presented. Finally, the economic aspects of an ETEG are also discussed. The review highlights the need of commercialization of TE materials with ZT > 2, high‐temperature operating range, and segmented TEG modules in large volumes so that their practice can be extended in vehicular applications. Heat exchanger modeling using computational fluid dynamics and interfacing with heat transfer theory is essential to maintain temperature uniformity across the TEG modules. Installation of ETEG in the exhaust pipe should be such that it does not affect the performance of the engine. It is also realized that sturdy TEG modules should be developed for long‐term operation to prevent degradation due to mechanical vibration and thermal cycling of the vehicle. Further, ETEG is economically beneficial in vehicles such as trucks owing to availability of high thermal energy in their exhaust stream.

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Thermoelectric and mechanical properties of the Bi0.5Sb1.5Te3 solid solution prepared by melt spinning

Cited by 31 publications

References 9 publications

Structural and Electrical Properties Characterization of Sb1.52Bi0.48Te3.0 Melt-Spun Ribbons

Structural and Electrical Properties Characterization of Sb1.52Bi0.48Te3.0 Melt-Spun Ribbons

Efficiency Assessment of Thermoelectric Generators in Heat-Insulated Combustion Engines

Thermoelectric conversion of waste heat from IC engine-driven vehicles: A review of its application, issues, and solutions

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