HPHT synthesis and thermoelectric properties of CoSb3 and Fe0.6Co3.4Sb12 skutterudites

Dong, Nan; Jia, Xiaopeng; Su, Taichao; Yu, Fengrong; Tian, Yongjun; Jiang, Yijing; Deng, Lei; Ma, Hongan

doi:10.1016/j.jallcom.2009.02.070

Cited by 15 publications

(6 citation statements)

References 17 publications

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“…[18][19][20][31][32][33] In a few other cases, high pressure is applied in conjunction with high temperature to obtain specific phases and/or to attain special electronic band structures. [34][35][36][37][38] Unlike most other chemical reactions that are ignited and sustained by heat, the process we herein report is basically mechanochemical. In this work, stoichiometric admixture of Cu (4 N, 200 mesh) and S/Se (5 N, 100 mesh) powders is hand ground in an agate mortar and cold pressed into a pellet of 15 mm diameter.…”

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confidence: 93%

Mechanochemical synthesis of high thermoelectric performance bulk Cu2X (X = S, Se) materials

Yang

Yan

et al. 2016

APL Materials

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We devised a single-step mechanochemical synthesis/densification procedure for Cu2X (X = S, Se) thermoelectric materials via applying a pressure of 3 GPa to a stoichiometric admixture of elemental Cu and X for 3 min at room temperature. The obtained bulk materials were single-phase, nearly stoichiometric structures with a relative packing density of 97% or higher. The structures contained high concentration of atomic scale defects and pores of 20-200 nm diameter. The above attributes gave rise to a high thermoelectric performance: at 873 K, the ZT value of Cu2S reached 1.07, about 2.1 times the value typical of samples grown from the melt. The ZT value of Cu2Se samples reached in excess of 1.2, close to the state-of-the-art value.

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confidence: 93%

Mechanochemical synthesis of high thermoelectric performance bulk Cu2X (X = S, Se) materials

Yang

Yan

et al. 2016

APL Materials

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“…The thermal conductivity is reduced in this case, but the sample density is low (relative density in the range of 65.71-74.48%). Recently, it was shown that high pressure sintering (HPS) technique can effectively increase material density and improve thermoelectric properties, especially the electrical conductivity [19][20][21]. The electrical resistivity of PbTe decreases sharply with increasing synthesis pressure from ambient pressure to 3.2 GPa [21].…”

Section: Introductionmentioning

confidence: 99%

“…The electrical resistivity of PbTe decreases sharply with increasing synthesis pressure from ambient pressure to 3.2 GPa [21]. For the p-type CoSb 3 samples synthesized under high pressure and high temperature with the grain size of micrometers, ZT was increased to 0.17 [20]. It is anticipated that HPS can also be used to fabricate n-type bulk CoSb 3 with improved thermoelectric properties.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric properties of n-type CoSb3 fabricated with high pressure sintering

Zhang

et al. 2010

Journal of Alloys and Compounds

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“…It is well known that the HPHT method is the most direct method to obtain the high pressure phase materials, such as the diamond and h-BN. In our previous reports, this technology have been used to synthesize other compounds successfully and obtained some results [19,20]. To further optimize thermoelectric performance of materials, two approaches are often used.…”

Section: Introductionmentioning

confidence: 99%

The Enhanced Thermoelectric Properties of Ba0.4Co4Sb11.7Te0.3 Prepared by the High-Pressure and High-Temperature Method

Hao

Deng

et al. 2014

High Temperature Materials and Processes

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Polycrystalline skutterudite Ba 0.4 Co 4 Sb 11.7 Te 0.3 with a bcc crystal structure was prepared by the HighPressure and High-Temperature (HPHT) method. The study explored a chemical method for introducing Ba atoms into the voids of CoSb 3 to optimize the thermoelectric figure of merit ZT in the system of Ba 0.4 Co 4 Sb 11.7 Te 0.3. The samples were characterized by X-ray diffraction, electron microprobe analysis, and thermoelectric properties measurement. The electrical resistivity, Seebeck coefficients and thermal conductivities of the samples were measured in the temperature range of 300-743 K. The power factor and the figure of merit, ZT, of the samples all increased with the increasing temperature. A dimensionless thermoelectric figure of merit of 0.87 at 743 K was achieved for n-type Ba 0.4 Co 4 Sb 11.7 Te 0.3 at last. The results indicated Ba-filled CoSb 3 prepared by HPHT method is an effective method to greatly enhance the thermoelectric properties of skutterudite compounds.

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HPHT synthesis and thermoelectric properties of CoSb3 and Fe0.6Co3.4Sb12 skutterudites

Cited by 15 publications

References 17 publications

Mechanochemical synthesis of high thermoelectric performance bulk Cu2X (X = S, Se) materials

Mechanochemical synthesis of high thermoelectric performance bulk Cu2X (X = S, Se) materials

Thermoelectric properties of n-type CoSb3 fabricated with high pressure sintering

The Enhanced Thermoelectric Properties of Ba0.4Co4Sb11.7Te0.3 Prepared by the High-Pressure and High-Temperature Method

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