Effects of Cl-Doping on Thermoelectric Transport Properties of Cu2Se Prepared by Spark Plasma Sintering

2018 ◽  
Vol 48 (4) ◽  
pp. 1958-1964 ◽  
Author(s):  
Min Ji Kim ◽  
Gil-Geun Lee ◽  
Woochul Kim ◽  
Kyomin Kim ◽  
Jang-Yeul Tak ◽  
...  
Keyword(s):  
Transport Properties ◽  
Spark Plasma Sintering ◽  
Thermoelectric Transport ◽  
Plasma Sintering ◽  
Thermoelectric Transport Properties ◽  
Spark Plasma

scholarly journals Thermoelectric Transport Properties of Cu Nanoprecipitates EmbeddedBi2Te2.7Se0.3

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Eunsil Lee ◽  
Jin Il Kim ◽  
Soon-Mok Choi ◽  
Young Soo Lim ◽  
Won-Seon Seo ◽  
...  
Keyword(s):  
Power Factor ◽  
Colloidal Suspension ◽  
Raw Material ◽  
Mixed Powder ◽  
Thermoelectric Transport ◽  
Plasma Sintering ◽  
Thermoelectric Transport Properties ◽  
Spark Plasma ◽  
Scalable Synthesis ◽  
Filtering Effect

We suggest a simple and scalable synthesis to prepare Cu-Bi2Te2.7Se0.3(Cu-BTS) nanocomposites. By precipitating Cu nanoparticle (NP) in colloidal suspension of as-exfoliated BTS, homogeneous mixtures of Cu NP and BTS nanosheet were readily achieved, and then the sintered nanocomposites were fabricated by spark plasma sintering technique using the mixed powder as a raw material. The precipitated Cu NPs in the BTS matrix effectively generated nanograin (BTS) and heterointerface (Cu/BTS) structures. The maximumZTof 0.90 at 400 K, which is 15% higher compared to that of pristine BTS, was obtained in 3 vol% Cu-BTS nanocomposite. The enhancement ofZTresulted from improved power factor by carrier filtering effect due to the Cu nanoprecipitates in the BTS matrix.

Thermoelectric performance of textured Bi2Te 3-based sintered materials prepared by spark plasma sintering

2003 ◽  
Vol 793 ◽  
Author(s):  
Lidong Chen ◽  
Jun Jiang ◽  
Xun Shi
Keyword(s):  
Spark Plasma Sintering ◽  
Bending Strength ◽  
Thermoelectric Performance ◽  
Polycrystalline Materials ◽  
Plasma Sintering ◽  
Grain Orientations ◽  
Thermoelectric Transport Properties ◽  
Spark Plasma ◽  
P Type ◽  
Sintered Materials

ABSTRACTThermoelectric performance of polycrystalline materials is greatly influenced by their microstructures including grain sizes, grain boundaries, grain orientations in anisotropic compounds, etc. The material microstructures are sensitive to the preparation processes and the starting materials. In the present study, n-type and p-type Bi2Te3-based sintered materials with highly preferred grain orientations have been fabricated through a spark plasma sintering (SPS) technique, by controlling the particle sizes of the starting powder and other sintering process parameters. The obtained textured Bi2Te3-based materials show a high mechanical strength as 80MPa in bending strength, which is 7 to 8 times as that of the melted ingot materials, and a significant anisotropy in thermoelectric transport properties. The optimal figure of merit (ZT) of the sintered materials in the direction perpendicular to the pressing direction (with c-axis preferred orientation) is comparable to that of the zone-melted ingots in the same crystallographic orientation.

Transport properties of hot-pressed bulk carbon nanotubes compacted by spark plasma sintering

Carbon ◽  
2009 ◽  
Vol 47 (4) ◽  
pp. 1135-1140 ◽  
Author(s):  
Jianlin Li ◽  
Lianjun Wang ◽  
Tin He ◽  
Wan Jiang
Keyword(s):  
Carbon Nanotubes ◽  
Transport Properties ◽  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Bulk Carbon

scholarly journals Thermoelectric Transport Properties of n-Type Sb-doped (Hf,Zr,Ti)NiSn Half-Heusler Alloys Prepared by Temperature-Regulated Melt Spinning and Spark Plasma Sintering

2020 ◽  
Vol 10 (14) ◽  
pp. 4963 ◽  
Author(s):  
Ki Wook Bae ◽  
Jeong Yun Hwang ◽  
Sang-il Kim ◽  
Hyung Mo Jeong ◽  
Sunuk Kim ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Spark Plasma Sintering ◽  
Figure Of Merit ◽  
Melt Spinning ◽  
Lattice Thermal Conductivity ◽  
Heusler Alloys ◽  
Thermoelectric Figure ◽  
Plasma Sintering ◽  
Thermoelectric Transport Properties ◽  
Spark Plasma

Herein we report a significantly reduced lattice thermal conductivity of Sb-doped Hf0.35Zr0.35Ti0.3NiSn half-Heusler alloys with sub-micron grains (grain size of ~300 nm). Polycrystalline bulks of Hf0.35Zr0.35Ti0.3NiSn1−xSbx (x = 0.01, 0.02, 0.03) with a complete single half-Heusler phase are prepared using temperature-regulated melt spinning and subsequent spark plasma sintering without a long annealing process. In these submicron-grained bulks, a very low lattice thermal conductivity value of ~2.4 W m−1 K−1 is obtained at 300 K due to the intensified phonon scatterings by highly dense grain boundaries and point-defects (Zr and Ti substituted at Hf-sites). A maximum thermoelectric figure of merit, zT, of 0.5 at 800 K is obtained in Hf0.35Zr0.35Ti0.3NiSn0.99Sb0.01.

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