Excess Enthalpy Measurements and Thermodynamic Evaluation of the Sn-Pb-Te System

Kattner, Ursula R.; Lukas, Hans Léo; Petzow, G.; Gather, B.; Irle, E.; Blachnik, R.

doi:10.1515/ijmr-1988-790106

Cited by 3 publications

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“…Figure (d), a typical lattice image of Pb 0.65 Sn 0.35 Te, does not show any nanoscale precipitates. Therefore, Pb 0.65 Sn 0.35 Te is clearly a solid solution and confirms the long held belief that the Pb 1- x Sn x Te system is a solid solution. − …”

Section: Resultssupporting

confidence: 79%

Role of Self-Organization, Nanostructuring, and Lattice Strain on Phonon Transport in NaPb_18-xSn_xBiTe₂₀ Thermoelectric Materials

Guéguen

Sootsman

et al. 2009

J. Am. Chem. Soc.

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The composition and microstructure of five thermoelectric materials, PbTe, SnTe, Pb(0.65)Sn(0.35)Te and NaPb(18-x)Sn(x)BiTe(20) (x = 5, 9), were investigated by advanced transmission electron microcopy. We confirm that the pure PbTe, SnTe, and Pb(0.65)Sn(0.35)Te have a uniform crystalline structure and homogeneous compositions without any nanoscale inclusions. On the other hand, the nominal NaPb(9)Sn(9)BiTe(20) phase contains extensive inhomogeneities and nanostructures with size distribution of 3-7 nm. We find that the chemical architecture of the NaPb(13)Sn(5)BiTe(20) member of the series to be more complex; besides nanoscale precipitates, self-organized lamellar structures are present which were identified as PbTe and SnTe by composition analysis and transmission electron microscopy image simulations. Density functional theory calculations suggest that the arrangement of the lamellar structures conforms to the lowest total energy configuration. Geometric-phase analyses revealed large distributed elastic strain around the nanoscale inclusions and lamellar structures. We propose that interface-induced elastic perturbations in the matrix play a decisive role in affecting the phonon-propagation pathways. The interfaces further enhance phonon scattering which, in turn, reduces the lattice thermal conductivity in these systems that directly results directly in improvement in the thermoelectric figure of merit.

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Section: Resultssupporting

confidence: 79%

Role of Self-Organization, Nanostructuring, and Lattice Strain on Phonon Transport in NaPb_18-xSn_xBiTe₂₀ Thermoelectric Materials

Guéguen

Sootsman

et al. 2009

J. Am. Chem. Soc.

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“…For the grading of PbTe through composition grading by directional solidification, a suitable PbTe-based system was carefully selected, namely, the pseudobinary PbTe−SnTe system. 51,52 There are a number of advantages in using SnTe-based thermoelectrics. First, they are lead free, thereby reducing the amount of toxic elements needed.…”

Section: Introductionmentioning

confidence: 99%

“…PbTe systems typically operate at much lower temperatures than the GeSi-based thermoelectrics we have studied previously; efficiency optimization through grading would broaden the scope of applications that may exploit thermoelectric technology. For the grading of PbTe through composition grading by directional solidification, a suitable PbTe-based system was carefully selected, namely, the pseudobinary PbTe–SnTe system. , There are a number of advantages in using SnTe-based thermoelectrics. First, they are lead free, thereby reducing the amount of toxic elements needed .…”

Section: Introductionmentioning

confidence: 99%

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Functionally Graded (PbTe)_1–x(SnTe)_x Thermoelectrics

et al. 2017

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Functionally graded (PbTe)1–x (SnTe) x ingots have been prepared by Bridgman crystal growth method for the first time. From SEM-EDX, the composition (x) of the ingot was found to increase smoothly from 10.6 to 25.4 along the direction of the growth. The gradual change in composition is shown to cause a decrease in band gap as crystallization proceeds, and to be accompanied by a change in carrier concentration. By a Potential-Seebeck microprobe (PSM), a smoothly varying Seebeck coefficient was measured along the growth direction of the sample at room temperature. High-temperature properties relevant for thermoelectric performance were measured and used to evaluate the potential of this system as a functionally graded high-temperature thermoelectric material. This study provides insight into understanding the complicated interplays of advanced crystal growth and physical properties, going beyond standard thermoelectric sample preparation approaches.

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Thermodynamics of Materials and Basis

Tedenac

2024

SpringerBriefs in Materials

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Excess Enthalpy Measurements and Thermodynamic Evaluation of the Sn-Pb-Te System

Cited by 3 publications

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Role of Self-Organization, Nanostructuring, and Lattice Strain on Phonon Transport in NaPb_18-xSn_xBiTe₂₀ Thermoelectric Materials

Role of Self-Organization, Nanostructuring, and Lattice Strain on Phonon Transport in NaPb_18-xSn_xBiTe₂₀ Thermoelectric Materials

Functionally Graded (PbTe)_1–x(SnTe)_x Thermoelectrics

Thermodynamics of Materials and Basis

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Excess Enthalpy Measurements and Thermodynamic Evaluation of the Sn-Pb-Te System

Cited by 3 publications

References 0 publications

Role of Self-Organization, Nanostructuring, and Lattice Strain on Phonon Transport in NaPb18-xSnxBiTe20 Thermoelectric Materials

Role of Self-Organization, Nanostructuring, and Lattice Strain on Phonon Transport in NaPb18-xSnxBiTe20 Thermoelectric Materials

Functionally Graded (PbTe)1–x(SnTe)x Thermoelectrics

Thermodynamics of Materials and Basis

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Role of Self-Organization, Nanostructuring, and Lattice Strain on Phonon Transport in NaPb_18-xSn_xBiTe₂₀ Thermoelectric Materials

Role of Self-Organization, Nanostructuring, and Lattice Strain on Phonon Transport in NaPb_18-xSn_xBiTe₂₀ Thermoelectric Materials

Functionally Graded (PbTe)_1–x(SnTe)_x Thermoelectrics