Relationships between Thermoelectric Properties and Milling Rotational Speed on Bi_0.3Sb_1.7Te_3.0 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

Bibliographic Information

Other Title

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

Abstract

A p-type Bi_0.3Sb_1.7Te_3.0 thermoelectric semiconductor, which has a high dimensionless figure of merit (ZT), was prepared by milling at various milling rotational speeds. The milled Bi_0.3Sb_1.7Te_3.0 powder changed from a partially alloyed state to a completely alloyed one with increasing rotational speed. The thermoelectric properties of Bi_0.3Sb_1.7Te_3.0 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. 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.

Journal

• MATERIALS TRANSACTIONS

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

  The Japan Institute of Metals and Materials

Keywords

• thermoelectric material
• Bi₂Te₃–Sb₂Te₃
• pulverized and intermixed elements sintering
• mechanical alloying
• hot-pressing

Details

• CRID: 1390282763022791936
• NII Article ID: 130007419199
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.mf201703
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 029126258
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029126258
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/59/8/59_MF201703/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed