Relationships between Thermoelectric Properties and Milling Rotational Speed on Bi₀.₃Sb₁.₇Te₃.₀ Thermoelectric Materials

  • Kitamura Masato
    Graduate School of Advanced Technology and Science, Tokushima University
  • Hirota Kenji
    Graduate School of Advanced Technology and Science, Tokushima University
  • Hasezaki Kazuhiro
    Department of Mechanical Science, Science and Technology Division, Graduate School of Technology, Industrial and Social Sciences, Tokushima University

書誌事項

タイトル別名
  • Relationships between Thermoelectric Properties and Milling Rotational Speed on Bi<sub>0.3</sub>Sb<sub>1.7</sub>Te<sub>3.0</sub> Thermoelectric Materials

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抄録

<p>A p-type Bi0.3Sb1.7Te3.0 thermoelectric semiconductor, which has a high dimensionless figure of merit (ZT), was prepared by milling at various milling rotational speeds. The milled Bi0.3Sb1.7Te3.0 powder changed from a partially alloyed state to a completely alloyed one with increasing rotational speed.</p><p>The thermoelectric properties of Bi0.3Sb1.7Te3.0 sintered disks differed depending on the milling rotational speed. The minimum electrical conductivity σ, thermal conductivity κ, and maximum Seebeck coefficient α at the rotational speed at which the transition from PIES (pulverized intermixed elements sintering) process to MA (mechanical alloying) followed by HP (hot pressing) occurred.</p><p>The ZT varied with changes in rotational speed, with a maximum value were obtained. This study have shown that the thermoelectric properties of materials prepared by powder metallurgy used milling were significantly affected by the milling energy, i.e., the rotational speed.</p>

収録刊行物

  • MATERIALS TRANSACTIONS

    MATERIALS TRANSACTIONS 59 (8), 1225-1232, 2018-08-01

    公益社団法人 日本金属学会

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