Nonmonotonic change in the structural grain size of the Bi0.4Sb1.6Te3 thermoelectric material synthesised by spark plasma sintering

Osvenskiy, V.B.; Panchenko, V. P.; Parkhomenko, Yu. N.; Sorokin, A. I.; Bogomolov, D. I.; Бублик, В. Т.; Tabachkova, N. Yu.

doi:10.1016/j.jallcom.2013.04.087

Cited by 9 publications

(5 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Using ball milling and the hot pressing or spark plasma sintering method, several groups have prepared nanocomposite Bi 0.4 Sb 1.6 Te 3 bulk samples. [2][3][4][5][6] The thermoelectric properties and the preparation methods are summarized in Table II. The ZT values of consolidated Bi 0.4 Sb 1.6 Te 3 alloys are shown in Fig. 8 as a function of temperature, including the results of our present work for comparison.…”

Section: Resultsmentioning

confidence: 99%

“…To produce Bi 0. 4 Table I summarizes the sample compositions and vacuum hot-pressing parameters of the Bi 0.4 Sb 1.6 Te 3 composite powders. The crystal structure of as-milled and hot-pressed samples were examined by x-ray diffraction (XRD) using a Siemens D-5000 XRD diffractometer with monochromatic Cu K a radiation.…”

Section: Methodsmentioning

confidence: 99%

“…Several groups have prepared nanocomposite Bi 0.4 Sb 1.6 Te 3 bulk samples by using ball milling and the hot pressing or spark plasma sintering method. [2][3][4][5][6] A peak ZT value of 0.9 at 450 K was obtained by combining ball milling and spark plasma sintering. 3 An efficient TE material should have large Seebeck coefficient, high electrical conductivity, and low thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermoelectric Properties of Nano/microstructured p-Type Bi0.4Sb1.6Te3 Powders Fabricated by Mechanical Alloying and Vacuum Hot Pressing

Lee

Hao

Chao

et al. 2013

Journal of Elec Materi

View full text Add to dashboard Cite

Two kinds of Bi 0.4 Sb 1.6 Te 3 powder with different particle and grain sizes were fabricated by high-energy ball milling. Powder mixtures with varied weight ratios were consolidated by vacuum hot pressing (HP) to produce nano/ microstructured composites of identical chemical composition. From measurements of the Seebeck coefficient, electrical resistivity, and thermal conductivity of these composites, a figure of merit (ZT) value of up to 1.19 was achieved at 373 K for the sample containing 40% nanograin powder. This ZT value is higher than that of monolithic nanostructured Bi 0.4 Sb 1.6 Te 3 . It is further noted that the ZT value of this sample in the temperature range of 450 K to 575 K is in the range of 0.7 to 1.1. Such ZT characteristics are suitable for power generation applications as no other material with a similar high ZT value in this temperature range has been observed until now. The achieved high ZT value can probably be attributed to the unique nano/ microstructure, in which the dispersed nanograin powder increases the number of phonon scattering sites, which in turn results in a decrease of the thermal conductivity while simultaneously increasing the electrical conductivity, owing to the existence of the microsized powder that can provide a fast carrier transportation network. These results indicate that the nano/microstructured Bi 0.4 Sb 1.6 Te 3 alloy can serve as a high-performance material for application in thermoelectric devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermoelectric Properties of Nano/microstructured p-Type Bi0.4Sb1.6Te3 Powders Fabricated by Mechanical Alloying and Vacuum Hot Pressing

Lee

Hao

Chao

et al. 2013

Journal of Elec Materi

View full text Add to dashboard Cite

show abstract

“…The CNTs were mixed to the powder of the prepared alloy in a ball mill with a 450-rpm rotation speed using a ratio of balls to powder mixture of 10: 1 in argon atmosphere for 4 h. On a spark plasma sintering (SPS) unit Labox 650, Sinter Land, the powders were mixed under a vacuum at a pressure of 50 MPa, and temperatures of 1023 K (the detailed process in the SPS unit is described in [18]). Circular disk-shaped synthetic samples were annealed for two days at 1073 K. The phase composition of the concerned samples was analyzed on a Difrey 401 diffractometer using CrKα (λ = 2.2909 A˚) radiation.…”

Section: Experimental Methodsmentioning

confidence: 99%

Thermoelectric performance of Fe2ALV/CNT-based alloys

et al. 2023

View full text Add to dashboard Cite

Heusler-type Fe2VxTi 1-xAl alloys offer an alternative solution for the generation of thermoelectric power near room temperature. In the current research, thermoelectric properties of the p-type Fe2V0.9Ti0.1Al and Fe2V0.9Ti0.1Al/CNTs alloys, prepared by SPS, were studied. Carbon nanotubes (CNTs) were used as dopants to improve the Seebeck coefficient and electrical conductivity. Upon doping with CNTs, the thermal conductivity was significantly reduced, meanwhile, the value of the power factor increased from 0.45 to 1.55 mW/mK2 at around 330K. The effect of CNT inclusions on the thermoelectric parameters of Fe2VxTi 1-xAl compounds was systematically studied. When compared to Fe2V0.9Ti0.1Al, which had a figure of merit of just 0.02 at 330 K, the CNT-containing samples showed a significantly improved figure of merit up to 0.07. we offer a novel technique to improve the performance of Fe2VAl alloys.

show abstract

“…Several studies have reported the preparation of nanocomposite Bi0.4Sb1.6Te3 bulk samples [15][16][17][22][23][24][25][26] through BM and hot pressing or spark plasma sintering (SPS). TE properties and preparation methods are listed in Table 1.…”

Section: Energies 2015 8mentioning

confidence: 99%

Thermoelectric Properties of Alumina-Doped Bi0.4Sb1.6Te3 Nanocomposites Prepared through Mechanical Alloying and Vacuum Hot Pressing

et al. 2015

View full text Add to dashboard Cite

Abstract:In this study, γ-Al 2 O 3 particles were dispersed in p-type Bi 0.4 Sb 1.6 Te 3 through mechanical alloying to form γ-Al 2 O 3 /Bi 0.4 Sb 1.6 Te 3 composite powders. The composite powders were consolidated using vacuum hot pressing to produce nano-and microstructured composites. Thermoelectric (TE) measurements indicated that adding an optimal amount of γ-Al 2 O 3 nanoparticles improves the TE performance of the fabricated composites. High TE performances with figure of merit (ZT) values as high as 1.22 and 1.21 were achieved at 373 and 398 K for samples containing 1 and 3 wt % γ-Al 2 O 3 nanoparticles, respectively. These ZT values are higher than those of monolithic Bi 0.4 Sb 1.6 Te 3 samples. The ZT values of the fabricated samples at 298-423 K are 1.0-1.22; these ZT characteristics make γ-Al 2 O 3 /Bi 0.4 Sb 1.6 Te 3 composites suitable for power generation applications because no other material with a similarly high ZT value has been reported at this temperature range. The achieved high ZT value may be attributable to the unique nano-and microstructures in which γ-Al 2 O 3 nanoparticles are dispersed among the grain boundary or in the matrix grain, as revealed by high-resolution transmission electron microscopy. The dispersed γ-Al 2 O 3 nanoparticles thus increase phonon scattering sites and reduce thermal conductivity. The results indicated that the nano-and microstructured γ-Al 2 O 3 /Bi 0.4 Sb 1.6 Te 3 alloy can serve as a high-performance material for application in TE devices.

show abstract

Nonmonotonic change in the structural grain size of the Bi0.4Sb1.6Te3 thermoelectric material synthesised by spark plasma sintering

Cited by 9 publications

References 11 publications

Thermoelectric Properties of Nano/microstructured p-Type Bi0.4Sb1.6Te3 Powders Fabricated by Mechanical Alloying and Vacuum Hot Pressing

Thermoelectric Properties of Nano/microstructured p-Type Bi0.4Sb1.6Te3 Powders Fabricated by Mechanical Alloying and Vacuum Hot Pressing

Thermoelectric performance of Fe2ALV/CNT-based alloys

Thermoelectric Properties of Alumina-Doped Bi0.4Sb1.6Te3 Nanocomposites Prepared through Mechanical Alloying and Vacuum Hot Pressing

Contact Info

Product

Resources

About