Thermoelectric Properties of FeSi2 Sintered Thermoelectric Using Granulated Powders by Spray Drying Method.

DOI Web Site 1 Citations 11 References

Bibliographic Information

Other Title
  • 粉末プロセスの制御と製品評価　　スプレー造粒粉末を用いたＦｅＳｉ２焼結熱電材料の熱電特性
  • スプレーゾウリュウ フンマツ オ モチイタ FeSi2 ショウケツ ネツデンザ

Search this article

Abstract

FeSi2 alloys doped with Mn or Co (p-type Fe0.92Mn0.08Si2, n-type Fe0.98Co0.02Si2) were prepared by vacuum induction melting. The ingots were pulverized in a jet mill, and the powders were granulated by spray drying method using aqueous polyvinylalcohol (PVA) binder, in order to investigate the possibility of production on a large scale. The powders granulated exhibited excellent characteristics of fluidity, leading to smoothly feed it into a die cavity. To remove the binder from a compacted body, it was debindered at 723K for lh in H2, and then sintered at 1423K for 5h in H2, so that the residual carbon and oxygen contents in a sintered body approached those of the starting powder. Subsequently it was annealed at 1113K for 100h in Ar, so that it was almost composed of β-FeSi2. The thermoelectric figures of merit (Z) for optimal p- and n-type FeSi2 thermoelectric are 1.75×10-4(K-1) and 2.0×10-4(K-1), respectively, which are slightly higher than those obtained by H. Nagai on a laboratory scale.

Journal

Citations (1)*help

See more

References(11)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top