A new method of synthesis for thermoelectric materials: HPHT

Zhu, Pinwen; Jia, Xiaopeng; Chen, H.Y; Guo, Wei; Chen, L.X; Li, D.M; Ma, Hongan; Ren, Guanhua; Zou, Guangtian

doi:10.1016/s0038-1098(02)00182-5

Cited by 75 publications

(34 citation statements)

References 18 publications

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“…Furthermore, the chemical internal stress should increase with an increase of dopants. This result is in satisfactory agreement with those results measured in-situ under pressure [16] and our previous result of PbTe prepared by HPHT [6]. The higher pressure; the lower electrical resistivity is.…”

Section: Resultssupporting

confidence: 93%

See 1 more Smart Citation

Composition-dependent thermoelectric properties of PbTe doped with Bi2Te3

Zhu¹,

Imai²,

Isoda³

et al. 2006

Journal of Alloys and Compounds

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Section: Resultssupporting

confidence: 93%

“…In our previous result, the room-temperature thermoelectric properties of non-doped PbTe samples prepared by high pressure and high temperature (HPHT) have been largely improved [6]. Moreover, these un-doped PbTe samples exhibit the same characteristics as the heavily doped PbTe samples [7].…”

Section: Introductionmentioning

confidence: 90%

Composition-dependent thermoelectric properties of PbTe doped with Bi2Te3

Zhu¹,

Imai²,

Isoda³

et al. 2006

Journal of Alloys and Compounds

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“…15) The TE performance of PbTe should be further improved by the suitable dopant according to our previous result. 7) This is confirmed by the result that the figure-of-merit, 1:67 Â 10 À3 K À1 , is obtained in the alloy of AgPb 18 SbTe 20 at room temperature. 15) Compared to other dopants such as PbI 2 , the large number of Z obtained should be attributed to the large values of Seebeck coefficient and the low lattice thermal conductivity for Sb 2 Te 3 as dopants in PbTe.…”

Section: Resultsmentioning

confidence: 58%

“…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.…”

Section: Introductionmentioning

confidence: 85%

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

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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“…[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: 92%

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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A new method of synthesis for thermoelectric materials: HPHT

Cited by 75 publications

References 18 publications

Composition-dependent thermoelectric properties of PbTe doped with Bi2Te3

Composition-dependent thermoelectric properties of PbTe doped with Bi2Te3

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

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