scholarly journals Enhanced thermoelectric performance of porous magnesium tin silicide prepared using pressure-less spark plasma sintering

2015 ◽  
Vol 3 (33) ◽  
pp. 17426-17432 ◽  
Author(s):  
Huanpo Ning ◽  
Gioacchino Dario Mastrorillo ◽  
Salvatore Grasso ◽  
Baoli Du ◽  
Takao Mori ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Thermoelectric Performance ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Porous Magnesium ◽  
Sample Pressure

The porous Mg2(Si, Sn) sample pressure-lessly sintered at 1123 K by SPS with a porosity of 37% showed an enhanced maximum zT = 1.63 at 615 K.

Fabrication and Thermoelectric Properties of Magneli Phases by Adding Ti into TiO2

2011 ◽  
Vol 415-417 ◽  
pp. 1291-1296 ◽  
Author(s):  
Yun Lu ◽  
Yusuke Matsuda ◽  
Katsuhiro Sagara ◽  
Liang Hao ◽  
Takahito Otomitsu ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Spark Plasma Sintering ◽  
Thermoelectric Properties ◽  
Thermoelectric Performance ◽  
Mixed Powder ◽  
Magnéli Phases ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Ti Powder ◽  
Ti Addition

In the present study, the TiO2-Ti compacts with Magneli phases TinO2n-1 were fabricated using the mixed powder of TiO2 powder and addition Ti powder by spark plasma sintering (SPS). The composition and the crystal types of Magneli phases TinO2n-1 were examined. The results showed that various Magneli phases TinO2n-1 (single or multi Magneli phases) with the composition of Ti1+yO2-x were obtained. The Magneli phases TinO2n-1 were formed in the transformation from the mother phase rutile TiO2 to TiO with increase in Ti addition fraction. In addition, the thermoelectric properties of the sintered compacts were also measured. The electrical resistivity of the sintered compacts decreased with increase in Ti addition fraction. The thermoelectric performance of the sintered compacts was improved by the formation of Magneli phases TinO2n-1 with the composition of Ti1+yO2-x.

Thermoelectric performance enhancement of Cu2S by Se doping leading to a simultaneous power factor increase and thermal conductivity reduction

2017 ◽  
Vol 5 (31) ◽  
pp. 7845-7852 ◽  
Author(s):  
Yao Yao ◽  
Bo-Ping Zhang ◽  
Jun Pei ◽  
Yao-Chun Liu ◽  
Jing-Feng Li
Keyword(s):  
Thermal Conductivity ◽  
Mechanical Alloying ◽  
Spark Plasma Sintering ◽  
Power Factor ◽  
Performance Enhancement ◽  
Thermoelectric Performance ◽  
Plasma Sintering ◽  
Se Doping ◽  
Spark Plasma

A series of single-phased Cu2S1−xSex bulks were prepared by using mechanical alloying (MA) combined with spark plasma sintering (SPS). Our results suggest that the TE properties of Cu2S can be greatly enhanced by simultaneously increasing PF and decreasing κ via doping a sole Se element.

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