| Title |
Research Paper - Electronic. Magnetic & Optical Materials : Hot extrusion process and thermoelectric properties of p - type Bi0.5 Sb1.5 Te3 thermoelectric materials |
| Authors |
이두면(Doo Myun Lee); 송준호(Jun Ho Seo); 김성용(Sung Ryong Kim); 이지환(Chi Hwan Lee) |
| Abstract |
The thermoelectric properties of p-type Bi_(0. 5)Sb_(1. 5)Te₃ thermoelectric materials, which were fabricated by extrusion at temperature ranged from 300 to 500℃ with various amounts of Te dopants (0 to 6 %), were studied. The microstructure of the thermoelectric materials was investigated by optical microscopy and scanning electron microscopy. The microstructure of the extruded specimen was dense, fine-grained, and elongated along the extrusion direction. The relative density increased with increasing extrusion temperature. The highest relative density (99.6 %) was obtained by extrusion at 440℃. The value of figure of merit (2.94×10^(-3)/K) was the highest at the extrusion temperature of 440℃ and at the dopant of 4 wt% Te. |