p-type Bi0.4Sb1.6Te3 nanocomposites with enhanced figure of merit

Fan, Shufen; Zhao, Junnan; Guo, Jun; Yan, Qingyu; Ma, Jan; Hng, Huey Hoon

doi:10.1063/1.3427427

Cited by 141 publications

(89 citation statements)

References 19 publications

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“…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. The short sintering times, applicability for wide range of materials from oxides to alloys, industrial scalability has driven the use of this technique in recent times.…”

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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“…28 sample was used for measuring the instrumental profile. 30 The electrical resistivity as a function of temperature () of all the samples was measured using conventional four-probe technique.…”

Section: Methodsmentioning

confidence: 99%

Sb concentration dependent structural and resistive properties of polycrystalline Bi-Sb alloys

Malik

Das

Mondal

et al. 2012

Journal of Applied Physics

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Polycrystalline Bi 1-x Sb x alloys have been synthesized over a wide range of antimony concentration (0.08 < x < 0.20) by solid state reaction method. In depth structural analysis using X-Ray diffraction (XRD) and temperature dependent resistivity () measurement of synthesized samples have been performed. XRD data confirmed single phase nature of polycrystalline samples and revealed that complete solid solution is formed between bismuth and antimony.Rietveld refinement technique, utilizing MAUD software, has been used to perform detail structural analysis of the samples and lattice parameters of polycrystalline Bi 1-x Sb x alloys have been estimated. Lattice parameter and unit cell volume decreases monotonically with increasing antimony content. The variation of lattice parameters with antimony concentration depicts a distinct slope change at x = 0.12. Band gap (E g ) has been estimated from the thermal variation of resistivity data, with the 12% Sb content sample showing maximum E g . It has been observed that, with increasing antimony concentration the transition from direct to indirect gap semiconductor is intimately related to the variation of the estimated lattice parameters. Band diagram for the polycrystalline Bi 1-x Sb x alloy system has also been proposed.

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“…4) Lan et al prepared bulk nanograined bismuth antimony telluride by a ball milling and hot-pressing method, and the maximum ZT reached 1.4 at 373 K. 5) However, the use of rare or toxic elements in above-mentioned compounds with nanostructured constituents will limit their large-scale commercial applications, even though their ZT values were more than 1.0.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric properties of Nb-doped SrTiO3 ceramics enhanced by potassium titanate nanowires addition

Wang

et al. 2010

J. Ceram. Soc. Japan

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Nb-doped SrTiO 3 thermoelectric ceramic composites with potassium titanate (KTO) nanowires addition were fabricated by the pressure-less sintering method in an Ar atmosphere. KTO addition significantly reduced the thermal conductivity and enhanced the electrical conductivity. Meanwhile, the Seebeck coefficient was almost independent of KTO addition, thus, enhancing the dimensionless thermoelectric figure of merit, ZT. The sample with 3 wt % KTO addition gave the maximum ZT of 0.34 at 900 K. The reason for the enhanced thermoelectric properties by KTO addition was also investigated.

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p-type Bi0.4Sb1.6Te3 nanocomposites with enhanced figure of merit

Abstract: p-type Bi0.4Sb1.6Te3 nanocomposites with enhanced figure of merit

Cited by 141 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

Sb concentration dependent structural and resistive properties of polycrystalline Bi-Sb alloys

Thermoelectric properties of Nb-doped SrTiO3 ceramics enhanced by potassium titanate nanowires addition

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