Off-stoichiometry effects on the thermoelectric properties of Cu2+δSe (−0.1 ≤ δ ≤ 0.05) compounds synthesized by a high-pressure and high-temperature method

CrystEngComm ◽  
2020 ◽  
Vol 22 (4) ◽  
pp. 695-700 ◽  
Author(s):  
Lisha Xue ◽  
Weixia Shen ◽  
Zhuangfei Zhang ◽  
Manjie Shen ◽  
Wenting Ji ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Chemical Composition ◽  
Transport Properties ◽  
Carrier Concentration ◽  
Thermoelectric Properties ◽  
Carrier Mobility ◽  
Temperature Method

The chemical composition can directly tune the transport properties of Cu2Se liquid-like materials, including the carrier concentration, carrier mobility and superionic feature.

Thermoelectric properties of S-doped Cu2Se materials synthesized by high-pressure and high-temperature method

2019 ◽  
Vol 34 (01) ◽  
pp. 2050006
Author(s):  
Lisha Xue ◽  
Chao Fang ◽  
Weixia Shen ◽  
Manjie Shen ◽  
Wenting Ji ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
High Pressure ◽  
Electrical Resistivity ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Composition Change ◽  
Selenium Compounds ◽  
Competitive Effects ◽  
Temperature Method ◽  
Pressure Synthesis

High-pressure technique is an effective route to synthesize thermoelectric materials and tune transport properties simultaneously. In this work, S-doped copper–selenium compounds [Formula: see text], [Formula: see text] were successfully synthesized by high-pressure and high-temperature (HPHT) technology in just 30 min. [Formula: see text] samples show layered morphology composed of abundant pores and lattice defects. The appropriate S introduction ([Formula: see text] and 0.03) can effectively enhance Seebeck coefficient and reduce the thermal conductivity of [Formula: see text]. Compared with the pure [Formula: see text] sample, [Formula: see text] exhibits a 30% lower thermal conductivity, but the decline of power factor by the distinctly increased electrical resistivity at high temperature results in a smaller zT at temperature [Formula: see text] K. The variations of thermoelectric properties are resulted from the competitive effects between S-doping and actual composition change (Cu:S). It indicates that S-doping is not so effective in improving the zT value of [Formula: see text] materials by high-pressure synthesis.

Effect of HPHT processing on the structure, and thermoelectric properties of Co4Sb12 co-doped with Te and Sn

2015 ◽  
Vol 3 (8) ◽  
pp. 4637-4641 ◽  
Author(s):  
Hairui Sun ◽  
Xiaopeng Jia ◽  
Le Deng ◽  
Pin Lv ◽  
Xin Guo ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Polycrystalline Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Method ◽  
Co Doped

Te–Sn co-doped Co4Sb12 bulk polycrystalline materials Co4Sb11.7−xTexSn0.3 have been prepared using a high pressure and high temperature method and then characterized using X-ray diffraction.

Pressure-induced thermoelectric properties of strongly reduced titanium oxides

CrystEngComm ◽  
2019 ◽  
Vol 21 (6) ◽  
pp. 1042-1047
Author(s):  
Haiqiang Liu ◽  
Hongan Ma ◽  
Lixue Chen ◽  
Fei Wang ◽  
Baomin Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Titanium Oxides ◽  
Temperature Method

This is the first systematic investigations about thermoelectric properties of strongly reduced titanium oxides, accomplished by high-pressure and high-temperature method.

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

2014 ◽  
Vol 33 (1) ◽  
pp. 59-63
Author(s):  
Song Hao ◽  
Hong An Ma ◽  
Le Deng ◽  
Kai Kai Jie ◽  
Zhe Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Thermoelectric Figure Of Merit ◽  
X Ray Diffraction ◽  
Thermoelectric Figure ◽  
Seebeck Coefficients ◽  
Temperature Method ◽  
Increasing Temperature

AbstractPolycrystalline skutterudite Ba0.4Co4Sb11.7Te0.3 with a bcc crystal structure was prepared by the High-Pressure and High-Temperature (HPHT) method. The study explored a chemical method for introducing Ba atoms into the voids of CoSb3 to optimize the thermoelectric figure of merit ZT in the system of Ba0.4Co4Sb11.7Te0.3. 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 Ba0.4Co4Sb11.7Te0.3 at last. The results indicated Ba-filled CoSb3 prepared by HPHT method is an effective method to greatly enhance the thermoelectric properties of skutterudite compounds.

scholarly journals Thermoelectric properties of Ni0.15Co3.85Sb12 and Fe0.2Ni0.15Co3.65Sb12 skutterudites prepared by HPHT method

2017 ◽  
Vol 35 (3) ◽  
pp. 496-500 ◽  
Author(s):  
Lingjiao Kong ◽  
Hongan Ma ◽  
Yuewen Zhang ◽  
Xin Guo ◽  
Bing Sun ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Conductivity ◽  
High Pressure ◽  
High Temperature ◽  
Transport Properties ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
Thermoelectric Figure Of Merit ◽  
Thermoelectric Figure ◽  
Synthesis Time

AbstractN-type polycrystalline skutterudite compounds Ni0.15Co3.85Sb12 and Fe0.2Ni0.15Co3.65Sb12 with the bcc crystal structure were synthesized by high pressure and high temperature (HPHT) method. The synthesis time was sharply reduced to approximately half an hour. Typical microstructures connected with lattice deformations and dislocations were incorporated in the samples of Ni0.15Co3.85Sb12 and Fe0.2Ni0.15Co3.65Sb12 after HPHT. Electrical and thermal transport properties were meticulously researched in the temperature range of 300 K to 700 K. The Fe0.2Ni0.15Co3.65Sb12 sample shows a lower thermal conductivity than that of Ni0.15Co3.85Sb12. The dimensionless thermoelectric figure-of-merit (zT) reaches the maximal values of 0.52 and 0.35 at 600 K and 700 K respectively, for Ni0.15Co3.85Sb12 and Fe0.2Ni0.15Co3.65Sb12 samples synthesized at 1 GPa.

Thermoelectric Properties of Mg2Si0.995Sb0.005 Prepared by the High-Pressure High-Temperature Method

2016 ◽  
Vol 46 (5) ◽  
pp. 2570-2575 ◽  
Author(s):  
Jialiang Li ◽  
Gang Chen ◽  
Bo Duan ◽  
Yaju Zhu ◽  
Xiaojun Hu ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Temperature Method ◽  
High Pressure High Temperature

Preparation and transport properties of AgSbTe2 by high-pressure and high-temperature

2008 ◽  
Vol 454 (1-2) ◽  
pp. 415-418 ◽  
Author(s):  
Hongan Ma ◽  
Taichao Su ◽  
Pinwen Zhu ◽  
Jiangang Guo ◽  
Xiaopeng Jia
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Transport Properties

Rapid synthesis and thermoelectric properties of In0.1Co4sb11Te0.8Ge0.2 alloys via high temperature and high pressure

2015 ◽  
Vol 105 ◽  
pp. 38-41 ◽  
Author(s):  
Hairui Sun ◽  
Xiaopeng Jia ◽  
Pin Lv ◽  
Le Deng ◽  
Yuewen Zhang ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Thermoelectric Properties ◽  
Rapid Synthesis
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