발간논문

Home > KJMM 논문 > 발간논문

Vol.36, No.4, 614 ~ 622, 1998
Title
Thermoelectric Properties of the Hot-Pressed n-Type ( Pb-xGex )Te With the GeTe Content and Powder Processing Methods
최재식 , 오태성 , 현도빈 , 이희웅 Jae Shik Choi , Tae Sung Oh , Dow Bin Hyun , Hee Woong Lee
Abstract
0.3 wt% Bi-doped (Pb_(1-x)Ge_x)Te (0 ≤ x ≤ 0.15) alloy powders were fabricated by melting/grinding and mechanical alloying processes, and then hot pressed at 650℃. The (Pb_(1-x)Ge_x)Te alloys exhibited more negative Seebeck coefficient, higher electrical resistivity and lower thermal conductivity with increasing the GeTe content. The (Pb_(1-x)Ge_x)Te alloys fabricated by mechanical alloying exhibited much higher electrical resistivities, compared to the specimens processed by melting/grinding. Maximum figure-of-merits of 1.07×10^(-3)/K at 400℃ and 1.25×10^(-3)/K at 300℃ were obtained for PbTe and (Pb_(0.9)Ge_(0.1))Te processed by melting/grinding. A maximum figure-of-merit of 1.33×10^(-3)/K was obtained at 200℃ for PbTe fabricated by mechanical alloying. The figure-of-merit of (Pb_(1-x)Ge_x)Te fabricated by mechanical alloying decreased substantially with increasing the GeTe content due to the remarkable increase of the electrical resistivity.
Key Words
| PDF
대한금속∙재료학회 │ (06633) 서울시 서초구 서초대로 56길 38 대한금속∙재료학회 회관 (서초1동 1666-12번지)
Tel : 070-4266-1646 │ FAX : 02-557-1080 │ E-mail : metal@kim.or.kr
Copyright ⓒ 2013 사단법인 대한금속∙재료학회 All rights reserved.