Microstructure and thermoelectric properties of p-type Bi0.5Sb1.5Te3 fabricated by hot pressing

1997 ◽  
pp. 539-543
Author(s):  
Doo-Myun Lee ◽  
Jun-Ho Seo ◽  
Chi-Hwan Lee ◽  
Kyeongsoon Park ◽  
Ichiro Shiota
Keyword(s):  
Thermoelectric Properties ◽  
Hot Pressing ◽  
P Type

Annealing Effect on the Thermoelectric Properties of Undoped CoSb3

2006 ◽  
Vol 118 ◽  
pp. 565-570 ◽  
Author(s):  
Il Ho Kim ◽  
Jung Il Lee ◽  
Soon Chul Ur ◽  
Kyung Wook Jang ◽  
Good Sun Choi ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Phase Transitions ◽  
Thermoelectric Properties ◽  
Hot Pressing ◽  
Annealing Effect ◽  
Metallic Behavior ◽  
Arc Melting ◽  
P Type ◽  
Type Conduction

Binary skutterudite CoSb3 compounds were prepared by the arc melting and hot pressing processes and their thermoelectric properties were investigated at 300K-600K. Annealing effect was examined and it was correlated to phase transformation and homogenization. Thermoelectric properties of the arc-melted and hot-pressed CoSb3 were discussed and compared. Undoped CoSb3 prepared by the arc melting showed p-type conduction and metallic behavior at all temperatures examined. However, hot pressed specimens showed n-type conduction, possibly due to Sb evaporation. Thermoelectric properties were remarkably improved by annealing in vacuum and they were closely related to phase transitions.

scholarly journals Thermoelectric Properties of Nano/microstructured p-Type Bi0.4Sb1.6Te3 Powders Fabricated by Mechanical Alloying and Vacuum Hot Pressing

2013 ◽  
Vol 43 (6) ◽  
pp. 1718-1725 ◽  
Author(s):  
Pee-Yew Lee ◽  
Joey Hao ◽  
Tz-Yuan Chao ◽  
Jing-Yi Huang ◽  
Huey-Lin Hsieh ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Thermoelectric Properties ◽  
Hot Pressing ◽  
Vacuum Hot Pressing ◽  
P Type

Thermoelectric Properties on SixGe1-x Containing Fullerite

2007 ◽  
Vol 280-283 ◽  
pp. 409-412 ◽  
Author(s):  
Gui Ying Xu ◽  
Xiao Feng Wu ◽  
Li Li Zhang ◽  
Chang Chun Ge
Keyword(s):  
Quantum Dot ◽  
Thermoelectric Property ◽  
Thermoelectric Properties ◽  
Thermoelectric Material ◽  
Analytical Method ◽  
Hot Pressing ◽  
Thermoelectric Generator ◽  
Pressing Method ◽  
Higher Temperature ◽  
P Type

SixGe1-x (x = 0.75 for n-type and 0.7 for p-type) is a typical thermoelectric material used at higher temperature as thermoelectric generator. Its property is dependent on the composition. SixGe1-x containing different amount of fullerite added as hollow quantum dot were fabricated by hot-pressing method. The relations among thermoelectric property, the amount of fullerite and the microstructure were investigated by normal measurement and analytical method.

Thermoelectric Properties of P-Type (Bi1−xSbx)2Te3 Fabricated by Mechanical Alloying Process

1997 ◽  
Vol 478 ◽  
Author(s):  
Boo Yang Jung ◽  
Jae Shik Choi ◽  
Tae Sung Oh ◽  
Dow-Bin Hyun
Keyword(s):  
Mechanical Alloying ◽  
Thermoelectric Properties ◽  
Hot Pressing ◽  
Alloy Powder ◽  
Figure Of Merit ◽  
Processing Time ◽  
Pressing Temperature ◽  
Acceptor Dopant ◽  
Maximum Value ◽  
P Type

AbstractThermoelectric properties of polycrystalline (Bi1−xSbx)2Te3 (0.75 ≤ x ≤ 0.85), fabricated by mechanical alloying and hot pressing methods, have been investigated. Formation of (Bi0.25Sb0.75)2Te3 alloy powder was completed by mechanical alloying for 5 hours at ball- to-material ratio of 5: 1, and processing time for (Bi1−xSbx)2Te3 formation increased with Sb2Te3 content x. When (Bi0.25Sb0.75)2Te3 was hot pressed at temperatures ranging from 300°C to 550°C for 30 minutes, figure-of-merit increased with hot pressing temperature and maximum value of 2.8 × 10−3/K could be obtained by hot pressing at 550°C. When hot pressed at 550°C, (Bi0.2Sb0.8)2Te3 exhibited figure-of-merit of 2.92 × 10−3/K, which could be improved to 2.97 × 10−3/K with addition of 1 wt% Sb as acceptor dopant.

Thermoelectric properties of p-type 25%Bi2Te3+75%Sb2Te3 alloys manufactured by rapid solidification and hot pressing

2002 ◽  
Vol 90 (1-2) ◽  
pp. 42-46 ◽  
Author(s):  
Taek-Soo Kim ◽  
Ik-Soo Kim ◽  
Taek-Kyung Kim ◽  
Soon-Jik Hong ◽  
Byong-Sun Chun
Keyword(s):  
Rapid Solidification ◽  
Thermoelectric Properties ◽  
Hot Pressing ◽  
P Type

Thermoelectric properties of p-type (Bi,Sb)2Te3 alloys fabricated by the hot pressing method

1998 ◽  
Vol 4 (1) ◽  
pp. 75-81 ◽  
Author(s):  
Hee-Jeong Kim ◽  
Hang-Chong Kim ◽  
Dow-Bin Hyun ◽  
Tae-Sung Oh
Keyword(s):  
Thermoelectric Properties ◽  
Hot Pressing ◽  
Pressing Method ◽  
P Type

Microstructural and Thermoelectric Properties of P-Type Te–Doped Bi0.5Sb1.5Te3 And N-Type SbI3-Doped Bi2Te2.85Se0.15 Compounds

1997 ◽  
Vol 478 ◽  
Author(s):  
J. Seo ◽  
K. Park ◽  
C. Lee ◽  
J. Kim
Keyword(s):  
Thermoelectric Properties ◽  
Hot Pressing ◽  
Figure Of Merit ◽  
Crystalline Quality ◽  
Fracture Path ◽  
Pressing Temperature ◽  
High Crystalline Quality ◽  
Transgranular Cleavage ◽  
Temperature Range ◽  
P Type

AbstractThe p-type Te-doped Bi0.5Sb1.5Te3 and n-type SbI3-doped Bi2Te2.85Se0.15 thermoelectric compounds were fabricated by hot pressing in the temperature range of 380 to 440 °C under 200 MPa in Ar. Both the compounds were highly dense and showed high crystalline quality. The grains of the compounds were preferentially oriented and contained many dislocations through the hot pressing. The fracture path followed the transgranular cleavage planes, which are perpendicular to the c-axis. In addition, with increasing the pressing temperature, the figure of merit was increased. The highest values of figure of merit for the p- and n-type compounds, which were obtained at 420 °C, were 2.69 × 10−3/K and 2.35×10−3/K, respectively.

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