Thermoelectric transport properties of bismuth telluride bulk materials fabricated by ball milling and spark plasma sintering

2010 ◽  
Vol 496 (1-2) ◽  
pp. 687-690 ◽  
Author(s):  
Chia-Hung Kuo ◽  
Chii-Shyang Hwang ◽  
Ming-Shan Jeng ◽  
Wei-Sheng Su ◽  
Ya-Wen Chou ◽  
...  
Keyword(s):  
Transport Properties ◽  
Ball Milling ◽  
Spark Plasma Sintering ◽  
Bismuth Telluride ◽  
Bulk Materials ◽  
Thermoelectric Transport ◽  
Plasma Sintering ◽  
Thermoelectric Transport Properties ◽  
Spark Plasma

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

Spark Plasma Sintering Effect on Thermoelectric Properties of Nanostructured Bismuth Telluride Synthesized by High Energy Ball Milling

2020 ◽  
Vol 20 (6) ◽  
pp. 3902-3908
Author(s):  
Sandeep K. Pundir ◽  
Sukhvir Singh ◽  
Parveen Jain
Keyword(s):  
Thermal Conductivity ◽  
Ball Milling ◽  
Spark Plasma Sintering ◽  
Thermoelectric Properties ◽  
Bismuth Telluride ◽  
Figure Of Merit ◽  
High Energy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Ball

Thermoelectric properties of high energy ball milled nano structured bismuth telluride (Bi2Te3) have been reported. By high energy ball milling, alloyed bulk crystalline ingots crush into nanopowder and followed by spark plasma sintering (SPS), we have demonstrate high figure of merit (ZT) in bismuth telluride pellet samples. In this work systematic study carried out on three pellet samples of Bi2Te3, synthesized by high ball milling for the time period of 4 hours, 8 hours and 12 hours and followed by SPS at the same processing parameters. A peak value of dimensionless figure of merit of about 1.22 at the temperature of 473 K has been achieved for 8 hours ball milled pellet sample. This enhancement in ZT value is mostly due to decrease in thermal conductivity. Results of this study demonstrate that ball milling and SPS has a major effect in controlling the density of grain boundaries of Bi2Te3 nano particles, while the pressure exerted on the powder samples during SPS introduce stress at the boundaries of the crystallites. These disordered crystallite boundary regions exert scattering of thermal energy carriers which reduced the thermal conductivity of the materials.

Al-SiC Nanocomposites Produced by Ball Milling and Spark Plasma Sintering

2013 ◽  
Vol 1513 ◽  
Author(s):  
R.C. Picu ◽  
J.J. Gracio ◽  
G.T. Vincze ◽  
N. Mathew ◽  
T. Schubert ◽  
...  
Keyword(s):  
Yield Stress ◽  
Ball Milling ◽  
Spark Plasma Sintering ◽  
High Energy ◽  
Sic Nanoparticles ◽  
Sic Particles ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Ball ◽  
Annealing Experiments

ABSTRACTIn this work Al-SiC nanocomposites were prepared by high energy ball milling followed by spark plasma sintering of the powder. For this purpose Al micro-powder was mixed with 50 nm diameter SiC nanoparticles. The final composites had grains of approximately 100 nm dimensions, with SiC particles located mostly at grain boundaries. To characterize their mechanical behavior, uniaxial compression, micro- and nano-indentation were performed. Materials with 1vol% SiC as well as nanocrystalline Al produced by the same means with the composite were processed, tested and compared. AA1050 was also considered for reference. It was concluded that the yield stress of the nanocomposite with 1 vol% SiC is 10 times larger than that of regular pure Al (AA1050). Nanocrystalline Al without SiC and processed by the same method has a yield stress 7 times larger than AA1050. Therefore, the largest increase is due to the formation of nanograins, with the SiC particles’ role being primarily that of stabilizing the grains. This was demonstrated by performing annealing experiments at 150°C and 250°C for 2h, in separate experiments.

Sign in / Sign up

Export Citation Format

Share Document