High performance production of Bi 2Te 3 based thermoelectric materials on the route of the bulk mechanical alloying method

Yasushi Iwaisako, Tatsuhiko Aizawa, Atsushi Yamamoto, Toshitaka Ohta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In the commercial fabrication of thermoelectric materials, melting, ingot-making, pulverizing and sintering are fundamental steps for production. In the present new-production method on the route of bulk mechanical alloying, the elemental constituent granules or agglomerates with any selected composition can be used for direct solid-state synthesis into single or dual phase thermoelectric materials. Bi-Te-Sb system is adopted as the targeting thermoelectric materials to investigate the effect of fine-grained structure on the figure of merit. In addition, temperature and pressure conditions in hot pressing are widely varied to describe the effect of process parameters on the thermoelectric properties. As a rough sketch of high performance in this processing, 3.6 ks for fabrication of green compact with the relative density of 85% T.D., 3.6 ks for hot pressing to have fine grain size in 1 approximately 2 μm for high density of 99% T.D. or more, and Z = 3.15×10 -3/K in p-type Bi-Te system for the highest figure of merit.

Original languageEnglish
Title of host publicationInternational Conference on Thermoelectrics, ICT, Proceedings
PublisherIEEE
Pages234-237
Number of pages4
Publication statusPublished - 1999
Externally publishedYes
Event18th International Conference on Thermoelectrics (ICT'99) - Baltimore, MD, USA
Duration: 1999 Aug 291999 Sep 2

Other

Other18th International Conference on Thermoelectrics (ICT'99)
CityBaltimore, MD, USA
Period99/8/2999/9/2

Fingerprint

Mechanical alloying
Hot pressing
Fabrication
Ingots
Melting
Sintering
Processing
Chemical analysis
Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Iwaisako, Y., Aizawa, T., Yamamoto, A., & Ohta, T. (1999). High performance production of Bi 2Te 3 based thermoelectric materials on the route of the bulk mechanical alloying method In International Conference on Thermoelectrics, ICT, Proceedings (pp. 234-237). IEEE.

High performance production of Bi 2Te 3 based thermoelectric materials on the route of the bulk mechanical alloying method . / Iwaisako, Yasushi; Aizawa, Tatsuhiko; Yamamoto, Atsushi; Ohta, Toshitaka.

International Conference on Thermoelectrics, ICT, Proceedings. IEEE, 1999. p. 234-237.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Iwaisako, Y, Aizawa, T, Yamamoto, A & Ohta, T 1999, High performance production of Bi 2Te 3 based thermoelectric materials on the route of the bulk mechanical alloying method in International Conference on Thermoelectrics, ICT, Proceedings. IEEE, pp. 234-237, 18th International Conference on Thermoelectrics (ICT'99), Baltimore, MD, USA, 99/8/29.
Iwaisako Y, Aizawa T, Yamamoto A, Ohta T. High performance production of Bi 2Te 3 based thermoelectric materials on the route of the bulk mechanical alloying method In International Conference on Thermoelectrics, ICT, Proceedings. IEEE. 1999. p. 234-237
Iwaisako, Yasushi ; Aizawa, Tatsuhiko ; Yamamoto, Atsushi ; Ohta, Toshitaka. / High performance production of Bi 2Te 3 based thermoelectric materials on the route of the bulk mechanical alloying method International Conference on Thermoelectrics, ICT, Proceedings. IEEE, 1999. pp. 234-237
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