Microstructure and thermoelectric properties of n-type Bi2Te2.85Se0.15 prepared by mechanical alloying and plasma activated sintering

Fan, Xiaoliang; Yang, Junyou; Zhu, Wen; Yun, Ho Seob; Chen, R.G.; Bao, Siqian; Duan, Xingkai

doi:10.1016/j.jallcom.2005.10.025

Cited by 48 publications

(27 citation statements)

References 19 publications

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“…4b, c), which agrees with the results reported in Ref. 11. The morphology of the fracture surface of sample II was similar to that of sample III.…”

Section: Resultssupporting

confidence: 91%

The Influence of Sintering Temperature on the Microstructure and Thermoelectric Properties of n-Type Bi2Te3−x Se x Nanomaterials

Cai

et al. 2010

Journal of Elec Materi

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nanopowders were hydrothermally synthesized, and n-type Bi 2 Te 3Àx Se x bulk samples were prepared by hot pressing a mixture of Bi 2 Te 3 and Bi 2 Se 3 nanopowders at 623 K, 648 K or 673 K and 80 MPa in vacuum. The phase composition of the powders and bulk samples were characterized by x-ray diffraction. The morphology of the powders was examined by transmission electron microscopy. The microstructure and composition of the bulk samples were characterized by field-emission scanning electron microscopy and energy-dispersive x-ray spectroscopy, respectively. The density of the samples increased with sintering temperature. The samples were somewhat oxidized, and the amount of oxide (Bi 2 TeO 5 ) present increased with sintering temperature. The samples consisted of sheet-like grains with a thickness less than 100 nm. Seebeck coefficient, electrical conductivity, and thermal conductivity of the samples were measured from room temperature up to 573 K. Throughout the temperature range investigated, the sample sintered at 623 K had a higher power factor than the samples sintered at 648 K or 673 K.

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“…4b, c), which agrees with the results reported in Ref. 11. The morphology of the fracture surface of sample II was similar to that of sample III.…”

Section: Resultssupporting

confidence: 91%

The Influence of Sintering Temperature on the Microstructure and Thermoelectric Properties of n-Type Bi2Te3−x Se x Nanomaterials

Cai

et al. 2010

Journal of Elec Materi

View full text Add to dashboard Cite

show abstract

“…The particles with basal planes bonded by van der Waals force would rotate perpendicular to the pressing direction. Furthermore, the pulse current induced a high electric field in samples and might promote the preferential orientation [14,16].…”

Section: Resultsmentioning

confidence: 99%

Thermoelectric properties of p-type Te-doped (Bi,Sb)2Te3 alloys by mechanical alloying and plasma activated sintering

Fan

Yang

Zhu

et al. 2008

Journal of Alloys and Compounds

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“…In contrast to both UDS and extruded materials, such techniques of uniaxial pressure consolidation tend to produce material having crystallographic textures where grain basal poles align along the direction of pressing rather than transverse to it, [22][23][24][25][26][27] although the intensity of the texture tends to be much lower for materials produced by SPS than those produced by UDS or extrusion. Thus, for UDS samples and extrudates, the preferential direction for thermoelectric efficiency (a axis) is parallel to the direction of crystal growth or extrusion, while for SPS or HP, it is perpendicular to the direction of applied pressure.…”

Section: Overviewmentioning

confidence: 99%

Effect of Processing Route on the Microstructure and Thermoelectric Properties of Bismuth Telluride-Based Alloys

Gothard

Wilks

Tritt

et al. 2010

Journal of Elec Materi

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Considerable work has been done to engineer materials with high efficiencies of thermoelectric heat-to-electricity conversion and the mechanical strength necessary to withstand the demands of practical applications. In particular, in the bismuth telluride system, extrusion pressing has been found to be effective for improving the mechanical strength of alloys via grain refinement. We review some of the literature relating to processing approaches for the bismuth telluride system. We also present preliminary data for a series of samples obtained by incorporating C 60 via ball milling and spark plasma sintering into a matrix consisting of a (Bi,Sb) 2 Te 3 alloy, with a focus on the texture of the composites and its relation to thermoelectric transport properties, in comparison to the parent material. The viability of improving the thermoelectric performance of bismuth telluride alloys by the insertion of nanoparticles into a composite is also considered.

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Microstructure and thermoelectric properties of n-type Bi2Te2.85Se0.15 prepared by mechanical alloying and plasma activated sintering

Cited by 48 publications

References 19 publications

The Influence of Sintering Temperature on the Microstructure and Thermoelectric Properties of n-Type Bi2Te3−x Se x Nanomaterials

The Influence of Sintering Temperature on the Microstructure and Thermoelectric Properties of n-Type Bi2Te3−x Se x Nanomaterials

Thermoelectric properties of p-type Te-doped (Bi,Sb)2Te3 alloys by mechanical alloying and plasma activated sintering

Effect of Processing Route on the Microstructure and Thermoelectric Properties of Bismuth Telluride-Based Alloys

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