Synthesis, characterization and physical properties of the skutterudites YbxFe2Ni2Sb12 (0≤x≤0.4)

Kaltzoglou, Andreas; Vaqueiro, Paz; Knight, Kevin S.; Powell, Anthony V.

doi:10.1016/j.jssc.2012.03.041

Cited by 19 publications

(9 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As previously described, in fact, S values of the systems containing even different fillers are quite close to each other, pointing at a dependence of the Seebeck coefficient mainly on electronic issues. This interpretation is confirmed by the analysis of the data collected at 350 K on (Sm,Gd) 0.15 (Fe 0.5 Ni 0.5 ) 4 Sb 12 (this work) and Yb y (Fe 0.5 Ni 0.5 ) 4 Sb 12 [43]. At this temperature, the former system is characterized by a higher power factor when compared to each composition of the latter.…”

Section: Resultssupporting

confidence: 73%

“…The comparison between ZT data of Fe80 and the ones of the corresponding Sm-filled sample [50] indicates that the single-filled system presents the maximum at a slightly higher temperature (~615 K), and a lower value of the figure of merit, as a consequence of the higher thermal conductivity. Analogously, a slightly lower value of the figure of merit is shown by Yb y (Fe 0.5 Ni 0.5 ) 4 Sb 12 at each y value [43] with respect to Fe50, as could be expected from the aforementioned very similar values of thermal conductivity for the two systems. Finally, the higher value of the maximum ZT occurring for the (Ba,DD,Yb) y (Fe 1 -x Ni x ) 4 Sb 12 system with x = 0.78 [42], can be considered as a direct consequence of the previously discussed higher power factor value.…”

Section: Resultsmentioning

confidence: 62%

“…For instance, the comparison between λov of (Sm,Gd) y (Fe x Ni 1 -x ) 4 Sb 12 and Sm y (Fe x Ni 1 -x ) 4 Sb 12 [50] with x = 0.8, points at a lower value for the former system, as a consequence of double filling. An analogous comparative approach applied to λov of (Sm,Gd) y (Fe x Ni 1 -x ) 4 Sb 12 with x = 0.5 and Yb y (Fe 0.5 Ni 0.5 ) 4 Sb 12 [43] reveals similar values in the two systems, at least in the 350 K–650 K temperature range. This evidence, which at a first glance could seem contradictory, finds an explanation when the valence state of Yb is taken into account.…”

Section: Resultsmentioning

confidence: 99%

“…An even more effective approach aimed at the depression of λph consists of the introduction of a structural disorder through the substitution of Co by Fe/Co [36,37,38,39], Co/Ni [40,41] Fe/Ni [29,34,38,42,43] or Fe/Co/Ni [30,31], the substitution of Sb by Sb/Sn or Sb/Ge [36], or multiple filling of the cavity by DD (didymium) [36,38,41], Mm (mischmetal) [31,41], Ce/Yb [30], Ce/Nd [44], Ce/Yb/In [45] or by a mixture of alkaline-earths [46] with the possible addition of lanthanide elements [41,42] and elements of the IIIB group [47]. Multiple filling, in particular, was thoroughly studied [48], since it ensures a broadening of the range of phonon frequencies which can be perturbed by the rattling movement of doping ions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Structural Properties and Thermoelectric Performance of the Double-Filled Skutterudite (Sm,Gd)y(FexNi1-x)4Sb12

et al. 2019

View full text Add to dashboard Cite

The structural and thermoelectric properties of the filled skutterudite (Sm,Gd)y(FexNi1-x)4Sb12 were investigated and critically compared to the ones in the Sm-containing system with the aim of unravelling the effect of double filling on filling fraction and thermal conductivity. Several samples (x = 0.50–0.90 and y = 0.15–0.48) were prepared by melting-sintering, and two of them were densified by spark plasma sintering in order to study their thermoelectric features. The crystallographic study enables the recognition of the role of the filler size in ruling the filling fraction and the compositional location of the p/n crossover: It has been found that the former lowers and the latter moves toward lower x values with the reduction of the filler ionic size, as a consequence of the progressively weaker interaction of the filler with the Sb12 cavity. The analysis of thermoelectric properties indicates that, despite the Sm3+/Gd3+ small mass difference, the contemporary presence of these ions in the 2a site significantly affects the thermal conductivity of both p- and n-compositions. This occurs by reducing its value with respect to the Sm-filled compound at each temperature considered, and making the overall thermoelectric performance of the system comparable to several multi-filled (Fe, Ni)-based skutterudites described in the literature.

show abstract

Section: Resultssupporting

confidence: 73%

Section: Resultsmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural Properties and Thermoelectric Performance of the Double-Filled Skutterudite (Sm,Gd)y(FexNi1-x)4Sb12

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Filled skutterudites R y M 4 X 12 , in particular, are of significance due to the high ZT values of some of them, reaching a peak of~1.7 for the n-type (Sr,Ba,Yb)Co 4 Sb 12 [22]. Moreover, the electronic content of this family of compounds can be easily tuned by employing, in place of Co, other transition metals or mixtures of them, giving rise to a lot of different compounds, such as Ni- [23], Fe/Ni- [6,24,25] and Fe/Co- [26][27][28] based ones.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Reactivity of the Filled Skutterudite Smy(FexNi1−x)4Sb12 in Contact with Liquid In-Based Alloys and Sn

Latronico

Valenza

Carlini

et al. 2020

Metals

View full text Add to dashboard Cite

The study of the wettability of thermoelectric materials, as well as the search for the most proper brazing alloys, is of the maximum importance to get one step closer to the realization of a thermoelectric device. In this work, a wettability study of the filled skutterudite Smy(FexNi1−x)4Sb12 by Sn and In-based alloys is presented. Samples, having both p- and n- characters were prepared by the conventional melting-quenching-annealing technique and subsequently densified by spark plasma sintering (SPS). Afterward, wettability tests were performed by the sessile drop method at 773 K for 20 min. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analyses performed on the cross-section of the solidified drops suggest quite a complicated scenario due to the coexistence and the interaction of a large number of different elements in each analyzed system. Indeed, the indication of a strong reaction of In-based alloys with skutterudite, accompanied by the formation of the InSb intermetallic compound, is clear; on the contrary, Sn exhibits a milder reactivity, and thus, a more promising behavior, being its appreciable wettability, whilst coupled to a limited reactivity.

show abstract

ChemInform Abstract: Synthesis, Characterization and Physical Properties of the Skutterudites Yb_xFe₂Ni₂Sb₁₂ (0 ≤ x ≤ 0.4).

et al. 2012

View full text Add to dashboard Cite

Synthesis, Characterization and Physical Properties of the Skutterudites YbxFe2Ni2Sb12 (0 ≤ x ≤ 0.4). -The title compounds are synthesized by solid state reaction of stoichiometric mixtures of the elements (1173 K, 12 h followed by annealing at 873 K for 6 d). The samples are characterized by powder XRD and thermoelectric measurements. The compounds crystallize in the cubic space group Im3 (Z = 2) with Yb atoms partially filling the voids of the skutterudite framework. Neutron time-of--flight diffraction results for Fe2Ni2Sb12 confirm the disorder of Fe and Ni atoms on the transition metal site. All the compounds display paramagnetic behavior between 2 and 300 K. The thermoelectric performance of the title skutterudites displays a marked dependence on the Yb content. Yb0.15Fe2Ni2Sb12 shows the optimum thermoelectric performance with a figure of merit of 0.064 at 350 K. -(KALTZOGLOU, A.; VAQUEIRO, P.; KNIGHT, K. S.; POWELL*, A. V.; J. Solid State Chem. 193 (2012) 36-41, http://dx.

show abstract

Synthesis, characterization and physical properties of the skutterudites YbxFe2Ni2Sb12 (0≤x≤0.4)

Cited by 19 publications

References 24 publications

Structural Properties and Thermoelectric Performance of the Double-Filled Skutterudite (Sm,Gd)y(FexNi1-x)4Sb12

Structural Properties and Thermoelectric Performance of the Double-Filled Skutterudite (Sm,Gd)y(FexNi1-x)4Sb12

Interfacial Reactivity of the Filled Skutterudite Smy(FexNi1−x)4Sb12 in Contact with Liquid In-Based Alloys and Sn

ChemInform Abstract: Synthesis, Characterization and Physical Properties of the Skutterudites Yb_xFe₂Ni₂Sb₁₂ (0 ≤ x ≤ 0.4).

Contact Info

Product

Resources

About

Synthesis, characterization and physical properties of the skutterudites YbxFe2Ni2Sb12 (0≤x≤0.4)

Cited by 19 publications

References 24 publications

Structural Properties and Thermoelectric Performance of the Double-Filled Skutterudite (Sm,Gd)y(FexNi1-x)4Sb12

Structural Properties and Thermoelectric Performance of the Double-Filled Skutterudite (Sm,Gd)y(FexNi1-x)4Sb12

Interfacial Reactivity of the Filled Skutterudite Smy(FexNi1−x)4Sb12 in Contact with Liquid In-Based Alloys and Sn

ChemInform Abstract: Synthesis, Characterization and Physical Properties of the Skutterudites YbxFe2Ni2Sb12 (0 ≤ x ≤ 0.4).

Contact Info

Product

Resources

About

ChemInform Abstract: Synthesis, Characterization and Physical Properties of the Skutterudites Yb_xFe₂Ni₂Sb₁₂ (0 ≤ x ≤ 0.4).