n-Type skutterudites (R,Ba,Yb)yCo4Sb12 (R=Sr, La, Mm, DD, SrMm, SrDD) approaching ZT≈2.0

Rogl, Gerda; Grytsiv, A.; Rogl, P.; Peranio, N.; Bauer, E.; Zehetbauer, M.; Eibl, O.

doi:10.1016/j.actamat.2013.09.039

Cited by 274 publications

(167 citation statements)

References 56 publications

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“…Finally, with ZT = 1.9, a world record for n-type skutterudites was set using this strategy. 80 Most recently, another world record, ZT = 1.45, was also established for p-type skutterudites 81 by means of a similar preparation procedure. It should be mentioned that in this case SPD does not introduce new phases and instead there are changes only in the density and arrangement of SPD-induced crystal lattice defects.…”

Section: Thermoelectricity and Superconductivitymentioning

confidence: 99%

Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later

Valiev

Estrin

Horita

et al. 2016

JOM

406

186

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It is now well established that the processing of bulk solids through the application of severe plastic deformation (SPD) leads to exceptional grain refinement to the submicrometer or nanometer level. Extensive research over the last decade has demonstrated that SPD processing also produces unusual phase transformations and leads to the introduction of a range of nanostructural features, including nonequilibrium grain boundaries, deformation twins, dislocation substructures, vacancy agglomerates, and solute segregation and clustering. These many structural changes provide new opportunities for fine tuning the characteristics of SPD metals to attain major improvements in their physical, mechanical, chemical, and functional properties. This review provides a summary of some of these recent developments. Special emphasis is placed on the use of SPD processing in achieving increased electrical conductivity, superconductivity, and thermoelectricity, an improved hydrogen storage capability, materials for use in biomedical applications, and the fabrication of high-strength metal-matrix nanocomposites.

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Section: Thermoelectricity and Superconductivitymentioning

confidence: 99%

Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later

Valiev

Estrin

Horita

et al. 2016

JOM

406

186

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“…[14][15][16][17][18][19][20][21][22] Apart from single-filled skutterudites, Yb has been also used being the filling elements for the double-filled or multiple-filled skutterudites, which possesses higher TE performances. [23][24][25] For example, the maximum TE figure of merit (zT) of 1.7 and 2.0, have been reported for (Ba, La, Yb) x Co 4 Sb 12 and (Sr, Ba, Yb) x Co 4 Sb 12 , respectively. 24,25 Since carrier concentration (n) dominates electrical transports and simultaneously affects the electronic component of thermal conductivity, determining the optimal carrier concentration range in a TE material is very important in order to maximize the TE performance.…”

Section: Introductionmentioning

confidence: 99%

“…[23][24][25] For example, the maximum TE figure of merit (zT) of 1.7 and 2.0, have been reported for (Ba, La, Yb) x Co 4 Sb 12 and (Sr, Ba, Yb) x Co 4 Sb 12 , respectively. 24,25 Since carrier concentration (n) dominates electrical transports and simultaneously affects the electronic component of thermal conductivity, determining the optimal carrier concentration range in a TE material is very important in order to maximize the TE performance. In filled skutterudites, the fillers provide electrons to the system and thus the carrier concentration is directly determined by the filling fraction of fillers.…”

Section: Introductionmentioning

confidence: 99%

Electrical and thermal transport properties of Y bxCo4Sb12 filled skutterudites with ultrahigh carrier concentrations

Qiu

Xiong³

et al. 2015

AIP Advances

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For filled skutterudites, element Yb is one of the most common and important fillers. However, the optimal carrier concentration range in Y bxCo4Sb12 filled skutterudites has not been determined as a result of the low Yb filling fraction limit. In this study, a non-equilibrium fabrication process (MS-SPS process), consisting of a melt-spinning method and a spark plasma sintering technique, has been applied to prepare Y bxCo4Sb12 samples. The Yb filling fraction is successfully extended to 0.35, which provides the possibility to clarify the optimal carrier concentration range for Yb-filled skutterudites. High carrier concentrations, with a maximum of around 1 × 1021 cm−3, were achieved in the MS-SPS Y bxCo4Sb12 samples due to the significantly enhanced Yb filling fractions. The phase compositions, lattice parameters, electrical and thermal transport properties of the MS-SPS Y bxCo4Sb12 samples with high carrier concentrations were systematically investigated. An optimal carrier concentration range of around 5 ∼ 6 × 1020 cm−3, corresponding to the actual Yb filling fraction of around 0.21∼0.26, has been determined, which displays the highest thermoelectric performance in Y bxCo4Sb12 thermoelectric materials.

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“…Традиционный метод получения фазы скуттерудита заключается в твердофазном синтезе в течение 7 дней с последующим четырехдневным отжигом [18]. Для сокращения времени получения образцов термоэлек-трических материалов на основе скуттерудитов нами Рис.…”

Section: ведениеunclassified

“…Изображения микроструктур отожженных образцов, полученных с помощью растрового электронного мик-роскопа, показали, что скуттерудиты, полученные этим методом, имеют такую же микроструктуру, как и скутте-рудиты, полученные методом твердофазного синтеза [18] …”

Section: результаты исследованийunclassified

Термоэлектрические свойства скуттерудитов Ce-=SUB=-x-=/SUB=-Nd-=SUB=-y-=/SUB=-Co-=SUB=-4-=/SUB=-Sb-=SUB=-12-=/SUB=-

I.¹,

Воронин²,

Горшенков³

et al. 2017

Физика И Техника Полупроводников

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Приведены экспериментальные результаты исследований термоэлектрических свойств Co4Sb12, Ce0.1Nd0.5Co4Sb12 и Ce0.5Nd0.1Co4Sb12, полученных методом индукционной плавки. Термоэлектрическая эффективность ZT исследованного Co4Sb12 превышает примерно в 2 раза ZT незаполненных скуттерудитов, приготовленных традиционным методом твердофазного синтеза. Термоэлектрическая эффективность Ce0.1Nd0.5Co4Sb12 и Ce0.5Nd0.1Co4Sb12 оказалась ниже, чем в Co4Sb12, вследствие наличия примесной фазы металлической сурьмы в первых двух образцах. Предположено, что термоэлектрические свойства заполненных скуттерудитов можно значительно повысить после оптимизации метода индукционной плавки. DOI: 10.21883/FTP.2017.07.44655.41

show abstract

n-Type skutterudites (R,Ba,Yb)yCo4Sb12 (R=Sr, La, Mm, DD, SrMm, SrDD) approaching ZT≈2.0

Cited by 274 publications

References 56 publications

Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later

Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later

Electrical and thermal transport properties of Y bxCo4Sb12 filled skutterudites with ultrahigh carrier concentrations

Термоэлектрические свойства скуттерудитов Ce-=SUB=-x-=/SUB=-Nd-=SUB=-y-=/SUB=-Co-=SUB=-4-=/SUB=-Sb-=SUB=-12-=/SUB=-

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