Electrical Transport and Thermoelectric Properties of PbTe Prepared by HPHT

Zhu, Pinwen; Imai, Yoshio; Isoda, Yukihiro; Shinohara, Yusuke; Jia, Xiaopeng; Ren, Guanhua; Zou, Guangtian

doi:10.2320/matertrans.45.3102

Cited by 41 publications

(29 citation statements)

References 17 publications

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“…7) Moreover, these undoped PbTe samples exhibit the same characteristics as the heavily doped PbTe samples. 8) In this result, the high TE performance of PbTe, which is induced by the electronic topological transition (ETT) under high pressure, 9) have been successfully obtained at room-temperature by HPHT. Besides the pressure-tuning, the ETT could be also induced by alloying.…”

Section: Introductionmentioning

confidence: 80%

Composition-Dependent Thermoelectric Properties of PbTe Doped with Sb2Te3

et al. 2005

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Although there are many reports on PbTe-SnTe and Bi 2 Te 3 -Sb 2 Te 3 systems with improved thermoelectric performance due to reduced lattice thermal conductivity, only few experimental data exist on PbTe-Sb 2 Te 3 system. In this report, the composition-dependent thermoelectric properties of PbTe doped with Sb 2 Te 3 have been studied at room-temperature. It is worth noting that the lattice thermal conductivity is only about 1 W/KÁm as the contents of Sb 2 Te 3 is larger than 0.8 mol%. In addition, the figure of merit shows a maximum value of 1:03 Â 10 À3 K À1with the content of Sb 2 Te 3 at 0.8 mol% which is the highest value obtained in doped bulk PbTe samples and is several times higher than that of PbTe containing other dopants with small grain sizes. This confirms that Sb 2 Te 3 is one of the best dopants for PbTe to enhance its thermoelectric performance.

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Section: Introductionmentioning

confidence: 80%

Composition-Dependent Thermoelectric Properties of PbTe Doped with Sb2Te3

et al. 2005

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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.…”

mentioning

confidence: 99%

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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“…The results indicate that the HPHT method has potential application in obtaining thermoelectric materials with good performance. 8 In 2007, Kraemer et al studied the phase stability of the skutterudite compound CoSb 3 at pressures above 20 GPa. They found that the cobalt antimonide undergoes an irreversible transition to another phase with a volume increase at ambient pressure.…”

Section: Introductionmentioning

confidence: 99%

The Effect of High-Pressure Sintering Process on the Microstructure and Thermoelectric Properties of CoSb3

Mei

Yao

et al. 2009

Journal of Elec Materi

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The high-pressure sintering process is studied for the fabrication of the bulk CoSb 3 thermoelectric material. The CoSb 3 powder is prepared by a solid reaction method, and then the samples are sintered under high-pressure conditions. The emphasis of the present study is on the influence of the pressure on the grain size and the electrical properties of the material. For the present study, the pressure is taken to be from 1.5 GPa to 6 GPa, and the sintering temperature is 723 K. The experimental results show that the major phase of skutterudite and traces of metal impurities of Sb and the CoSb 2 phase coexist in some of the samples, and that the grain size of all the samples increase after sintering. In the range of 3.0 GPa to 6.0 GPa, the grain size increases with increasing pressure. In the range of 1.5 GPa to 3.0 GPa, the grain size also increases, but with a diminishing growth rate. All the materials show p-type transport behaviors, and the sample sintered under 2.0 GPa shows higher electrical conductivity than the 5.7 GPa sample, which may be due to the impurities.

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Electrical Transport and Thermoelectric Properties of PbTe Prepared by HPHT

Cited by 41 publications

References 17 publications

Composition-Dependent Thermoelectric Properties of PbTe Doped with Sb<SUB>2</SUB>Te<SUB>3</SUB>

Composition-Dependent Thermoelectric Properties of PbTe Doped with Sb<SUB>2</SUB>Te<SUB>3</SUB>

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

The Effect of High-Pressure Sintering Process on the Microstructure and Thermoelectric Properties of CoSb3

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