Cristallographic anisotropy control of n-type Bi-Te-Se thermoelectric materials via bulk mechanical alloying and shear extrusion

Sang Seok Kim, Tatsuhiko Aizawa

研究成果: Article

9 引用 (Scopus)

抄録

The shear extrusion processing combined with bulk mechanical alloying is proposed to yield the n-type Bi-Te-Se material from elemental granules. It has well-developed texture so as to improve the electric conductivity and thermoelectric properties. The shear extrusion processing of (Bi 2Se 3) 0.05(Bi 2Te 3) 0.95 alloy green compact can afford the preferred orientation factor of anisotropic crystallographic structure: F = 0.67. The electric resistivity of (Bi 2Se 3) 0.05(Bi 2Te 3) 0.95 is controlled to be 0.491 × 10 -5 (Ωm), which is 0.2 times lower than that of hot-pressed specimen. Maximum power factor is achieved to be 3.31 × 10 -3 (W/mK 2) even without any dopants. The bending strength of the material produced in this work is also improved to be 166 MPa, 1.7 times higher than that of conventional hot-extruded specimens.

元の言語English
ページ(範囲)918-924
ページ数7
ジャーナルMaterials Transactions
45
発行部数3
出版物ステータスPublished - 2004 3
外部発表Yes

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thermoelectric materials
Mechanical alloying
alloying
Extrusion
Anisotropy
shear
anisotropy
Electric conductivity
flexural strength
Processing
Bending strength
textures
Textures
Doping (additives)
conductivity
electrical resistivity

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

これを引用

Cristallographic anisotropy control of n-type Bi-Te-Se thermoelectric materials via bulk mechanical alloying and shear extrusion. / Kim, Sang Seok; Aizawa, Tatsuhiko.

:: Materials Transactions, 巻 45, 番号 3, 03.2004, p. 918-924.

研究成果: Article

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