A comparative study of Spark Plasma Sintering (SPS), Hot Isostatic Pressing (HIP) and microwaves sintering techniques on p-type Bi2Te3 thermoelectric properties

Delaizir, Gaëlle; Bernard‐Granger, Guillaume; Monnier, Judith; Grodzki, R.; Kim-Hak, Olivier; Szkutnik, Pierre-David; Soulier, Mathieu; Saunier, Sébastien; Gœuriot, D.; Rouleau, O.; Simon, Julia; Godart, C.; Navone, Christelle

doi:10.1016/j.materresbull.2012.04.019

Cited by 79 publications

(32 citation statements)

References 19 publications

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“…A variety of processing routes have been utilized in order to enhance the figure of merit by obtaining a suitable microstructure in polycrystalline bismuth tellurides such as melt spinning, 3 hot extrusion, 4 and microwave sintering. 5 Considerable progress has been done in enhancing the figure of merit of these compounds by nanostructuring [6][7][8] and by introducing nano-inclusion. 9 Spark plasma sintering (SPS) method has been effectively used in recent times for densification of various types of materials.…”

mentioning

confidence: 99%

Enhanced thermoelectric performance in spark plasma textured bulk n-type BiTe2.7Se0.3 and p-type Bi0.5Sb1.5Te3

Bhame

Dhanapal

Prellier

et al. 2013

Applied Physics Letters

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Bulk p and n-type bismuth tellurides were prepared using spark plasma texturization method. The texture development along the uniaxial load in the 001 direction is confirmed from both x-ray diffraction analysis and electron backscattering diffraction measurements. Interestingly, those textured samples outperform the samples prepared by conventional spark plasma sintering (SPS) leading to a reduced thermal conductivity in the ab-plane. The textured samples of n-type BiTe2.7Se0.3 and p-type Bi0.5Sb1.5Te3 showed a 42% and 33% enhancement in figure of merit at room temperature, respectively, as compared to their SPS counterparts, opening the route for applications.

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mentioning

confidence: 99%

Enhanced thermoelectric performance in spark plasma textured bulk n-type BiTe2.7Se0.3 and p-type Bi0.5Sb1.5Te3

Bhame

Dhanapal

Prellier

et al. 2013

Applied Physics Letters

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“…21,22 Although the PF value of the MAHP-325 specimen Lattice Thermal Conductivity Reduction Due to In Situ-Generated Nano-Phase in Bi 0.4 Sb 1.6 Te 3 Alloys by Microwave Activated Hot Pressing is lower than that of the MPLS specimen, the ZT value (1.04) of the MAHP specimen is $ 40.54% higher than that (0.74) of the MPLS specimen. 22 The improved ZT value of the MAHP specimen can be attributed to relatively low thermal conductivity. This can be due to the relatively low sintering temperature used and the formation of in situ-generated nano-phase induced by the arcing effect in the microwave heating process.…”

Section: The Dimensionless Figure Of Meritmentioning

confidence: 94%

“…It can improve properties of sintered materials owing to its unique heating mechanism such as bulk heating, selective heating, non-thermal effect, 19 and hybrid heat effect. 20 Goeuriot et al 21,22 demonstrated the feasibility of microwave pressureless sintering (MPLS) for producing the p-type Bi 2 Te 3 -based TE materials. However, the relative density reached was only 85.6%.…”

Section: Introductionmentioning

confidence: 99%

Lattice Thermal Conductivity Reduction Due to In Situ-Generated Nano-Phase in Bi0.4Sb1.6Te3 Alloys by Microwave-Activated Hot Pressing

Yang

Fan

Rong

et al. 2014

Journal of Elec Materi

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The p-type Bi 0.4 Sb 1.6 Te 3 alloys are prepared using a new method of mechanical alloying followed by microwave-activated hot pressing (MAHP). The effect of sintering temperature on the microstructure and thermoelectric properties of Bi 0.4 Sb 1.6 Te 3 alloys is investigated. Compared with other sintering techniques, the MAHP process can be used to produce relatively compact bulk materials at lower sintering temperatures owing to its unique sintering mechanism. The grain size of the MAHP specimens increases gradually with the sintering temperature and a partially oriented lamellar structure can be formed in some regions of specimens obtained. The formation of the in situgenerated nano-phase is induced by the arcing effect of the MAHP process, which enhances the phonon scattering effect and decreases the lattice thermal conductivity. A minimum lattice thermal conductivity of 0.41 W/(mAEK) and a maximum figure of merit value of 1.04 are obtained at 100°C for the MAHP specimen sintered at 325°C. This technique may also be extended to other functional materials to obtain ultrafine microstructures at low sintering temperatures.

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“…Although HIPed and SPSed samples have high density and similar microsture, highest ZT values are obtained via microwaves (ZT ¼ 0:74, low compactness (90%)) and by SPS (ZT ¼ 0:68) because of the difference in charge carriers concentration and microstructure difference. 84 Osvenskiy et al 28 would like to understand the relationship between crystallite size of Bi 2 Te 3 and sintering temperature. The crystallite size grows with increasing temperature from 250 C to 400 C and decreases at temperatures from 400 C to 500 C. They explained this phenomenon as follows: the sample at 250 C leads to collective recrystallization under low defects mobility; at 300-400 C, the grains continue to grow and large twins appear; at 450 C, as the defect mobility increases, recrystallization occurs and new grains on the grain boundaries precipitate faster than the old grains grow.…”

Section: Spark Plasma Sinteringmentioning

confidence: 99%

Microstructure tailoring in nanostructured thermoelectric materials

et al. 2016

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Progresses in thermoelectric (TE) materials will contribute to solving the world's demands for energy and global climate protection. It also calls for higher ZT to achieve ideal commercial conversion efficiency. As an effective way, nanostructuring can reduce the thermal conductivity by the selective scattering of phonons or enhance Seebeck coefficient via modification of the density of the states, resulting in good ZT value. Meanwhile, TE properties of nanostructured materials should depend on the size and morphology of the microstructure features. This review emphasizes the developments in the TE bulk materials at the nanoscale in the past several years and summarizes the understanding in this active field.

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A comparative study of Spark Plasma Sintering (SPS), Hot Isostatic Pressing (HIP) and microwaves sintering techniques on p-type Bi2Te3 thermoelectric properties

Cited by 79 publications

References 19 publications

Enhanced thermoelectric performance in spark plasma textured bulk n-type BiTe2.7Se0.3 and p-type Bi0.5Sb1.5Te3

Enhanced thermoelectric performance in spark plasma textured bulk n-type BiTe2.7Se0.3 and p-type Bi0.5Sb1.5Te3

Lattice Thermal Conductivity Reduction Due to In Situ-Generated Nano-Phase in Bi0.4Sb1.6Te3 Alloys by Microwave-Activated Hot Pressing

Microstructure tailoring in nanostructured thermoelectric materials

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