Effects of Hydrogen Reduction in Microstructure, Mechanical and Thermoelectric Properties of Gas Atomized n-type Bi2Te2.7 Se0.3 Material

Pradip Rimal; Sang-min Yoon; Eun-Bin Kim; Chul-Hee Lee; Soon-Jik Hong

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자료유형: 학술저널

저자정보: Pradip Rimal Sang-min Yoon Eun-Bin Kim Chul-Hee Lee Soon-Jik Hong

저널정보: 한국분말야금학회 한국분말야금학회지 한국분말야금학회지 제23권 제2호

발행연도: 2016.1

수록면: 126 - 131 (6page)

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The recent rise in applications of thermoelectric materials has attracted interest in studies toward the fabrication of thermoelectric materials using mass production techniques. In this study, we successfully fabricate n-type Bi2Te2.7Se0.3 material by a combination of mass production powder metallurgy techniques, gas atomization, and spark plasma sintering. In addition, to examine the effects of hydrogen reduction in the microstructure, the thermoelectric and mechanical properties are measured and analyzed. Here, almost 60% of the oxygen content of the powder are eliminated after hydrogen reduction for 4 h at 360°C. Micrographs of the powder show that the reduced powder had a comparatively clean surface and larger grain sizes than unreduced powder. The density of the consolidated bulk using as-atomized powder and reduced atomized powder exceeds 99%. The thermoelectric power factor of the sample prepared by reduction of powder is 20% better than that of the sample prepared using unreduced powder.

#n-type Bi2Te3 #Gas atomization #Hydrogen reduction #Thermoelectric properties

참고문헌 (19)

참고문헌 신청

D. M. Rowe / 1995 / CRC Handbook of Thermoelectrics / CRC Press LLC

G. J. Snyder / 2008 / Nat. Mater. 7:105

Y. Lan / 2010 / Adv. Funct. Mater. 20:357

L. D. Zhao / 2009 / J. Alloys Compd. 467:91

김경태 / 2013 / Synthesis and Thermoelectric Properties of Carbon Nanotube-Dispersed Bi2Te3 Matrix Composite Powders by Chemical Routes / 한국분말야금학회지 20(5):345~349

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