Entropic stabilization and retrograde solubility in Zn<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>Sb<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Pomrehn, Gregory; Toberer, Eric S.; Snyder, G. Jeffrey; Walle, Axel van de

doi:10.1103/physrevb.83.094106

Cited by 42 publications

(33 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9), the mean value of the sound velocity can be obtained 38 14 MnSb 11 a low sound velocity, associated with soft interatomic bonds and the low effective heat capacity contribution due to the larger unit cell volume as compared to Zn 4 Sb 3 , are the reasons for the low thermal conductivity. In contrast, in the Sb DPS of Zn 4 Sb 3 a strong localized phonon mode is observed and this mode can be related to the proposed mechanism of the reduction of the acoustic phonon mean free path by vibrational subunits, 15 which are proposed to be a mechanism for the low thermal conductivity in Zn 4 Sb 3 , in addition to the Zn disorder and nanopores 13,52 observed in Zn 4 Sb 3 , which were also related to a low phonon mean free path.…”

Section: F Mmentioning

confidence: 92%

Lattice dynamics in the thermoelectric Zintl compound Yb14MnSb11

et al. 2011

View full text Add to dashboard Cite

The density of phonon states in the thermoelectric material Yb 14 MnSb 11 has been studied first by inelastic neutron scattering and second in an element-specific way by nuclear inelastic x-ray scattering. The low sound velocity of 1880(50) m/s as obtained from the density of phonon states can be identified as an important reason for the low heat transport in this system. The high melting temperature of Yb 14 MnSb 11 contrasts with the low energy of all phonons (<25 meV) and relates to an unusual lack of softening of phonon modes with temperature, when comparing the phonon density of states observed at ambient temperatures and at 1200 K. We have also measured the density of phonon states of the related Eu 14 MnSb 11 compound and of the thermoelectric Zintl phase Zn 4 Sb 3 in order to compare with related thermodynamic properties of Yb 14 MnSb 11 and to elucidate the different mechanisms of the heat conductivity reduction in Zintl phases.

show abstract

Section: F Mmentioning

confidence: 92%

Lattice dynamics in the thermoelectric Zintl compound Yb14MnSb11

et al. 2011

View full text Add to dashboard Cite

show abstract

“…According to calculations in Ref. [35] , the precipitation and the reabsorption of Zn will occur when the β-Zn4Sb3 sample is heated up from 300 K to 718 K.…”

Section: Discussionmentioning

confidence: 99%

In Operando Study of High‐Performance Thermoelectric Materials for Power Generation: A Case Study of β‐Zn₄sb₃

Hưng

Ngo

Han

et al. 2017

Adv Elect Materials

View full text Add to dashboard Cite

To date, many high-performance thermoelectric (TE) materials for power generation have been studied and reported. However, so far they have not been implemented in reliable commercial devices. To bring current achievements into a device for power generation, a full understanding the dynamic behavior of thermoelectric materials under operating conditions is needed. In this work, an in operando study is conducted on the high-performance TE material β-Zn4Sb3 under large temperature gradient and thermal cycling by a new approach using in-situ transmission electron microscopy combined with characterization of the TE properties. We found that after 30 thermal cycles in a low-pressure helium atmosphere the TE performance of β-Zn4Sb3 is maintained with the zT value of 1.4 at 718 K. Nevertheless, under a temperature gradient of 380 K (Thot = 673 K and Tcold = 293 K) operating for only 30 hours, zinc whiskers gradually precipitate on the cold side of the β-Zn4Sb3 leg. The dynamical evolution of Zn in the matrix of β-Zn4Sb3 was found to be the source that leads to a high zT value by lowering of the thermal conductivity and electrical resistivity, but it is also the failure mechanism for the leg under these conditions. The in operando study brings deep insight into the dynamic behavior of Advanced Electronic Materials 2 nanostructured TE materials for tailoring future TE materials and devices with higher efficiency and longer durability.

show abstract

“…With zT = 1.4 at 600 K, the most efficient material known to us is Zn 4 Sb 3 [1,2], however it is metastable [3][4][5] and can only be of p-type [1,6]. Other possibilities concern tellurides such as LAST and TAGS [1]; however, their use can only be very limited due to the weak abundance and the toxicity of tellurium.…”

Section: Introductionmentioning

confidence: 99%

“…The main reason for which the thermoelectric properties of Zn 4 Sb 3 are better than in ZnSb is its two times smaller thermal conductivity [1]. However, after more than one decade of effort it is still not possible to improve the stability of Zn 4 Sb 3 and no n-doped material has been found so far [1,6].…”

Section: Introductionmentioning

confidence: 99%

Physical properties of thermoelectric zinc antimonide using first-principles calculations

et al. 2012

View full text Add to dashboard Cite

Abstract:We report first principles calculations of the structural, electronic, elastic and vibrational properties of the semiconducting orthorhombic ZnSb compound. We study also the intrinsic point defects in order to eventually improve the thermoelectric properties of this already very promising thermoelectric material.Concerning the electronic properties, in addition to the band structure, we show that the Zn (Sb) crystallographically equivalent atoms are not exactly equivalent from the electronic point of view. Lattice dynamics, elastic and thermodynamic properties are found to be in good agreement with the experiments and they confirm the non equivalency of the zinc and antimony atoms from the vibrational point of view. The calculated elastic properties show a relatively weak anisotropy and the hardest direction is the y direction. We observe the presence of low energy modes involving both Zn and Sb atoms at about 5-6 meV, similarly to what has been found in Zn 4 Sb 3 and we suggest that the interactions of these modes with acoustic phonons could explain the relatively low thermal conductivity of ZnSb. Zinc vacancies are the most stable defects and this explains the intrinsic p-type conductivity of ZnSb.

show abstract

Entropic stabilization and retrograde solubility in Zn4Sb3

Cited by 42 publications

References 21 publications

Lattice dynamics in the thermoelectric Zintl compound Yb14MnSb11

Lattice dynamics in the thermoelectric Zintl compound Yb14MnSb11

In Operando Study of High‐Performance Thermoelectric Materials for Power Generation: A Case Study of β‐Zn₄sb₃

Physical properties of thermoelectric zinc antimonide using first-principles calculations

Contact Info

Product

Resources

About

Entropic stabilization and retrograde solubility in Zn4Sb3

Cited by 42 publications

References 21 publications

Lattice dynamics in the thermoelectric Zintl compound Yb14MnSb11

Lattice dynamics in the thermoelectric Zintl compound Yb14MnSb11

In Operando Study of High‐Performance Thermoelectric Materials for Power Generation: A Case Study of β‐Zn4sb3

Physical properties of thermoelectric zinc antimonide using first-principles calculations

Contact Info

Product

Resources

About

In Operando Study of High‐Performance Thermoelectric Materials for Power Generation: A Case Study of β‐Zn₄sb₃