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

• 貞富 信裕

  住友特殊金属(株)

• 植田 雅巳

  住友特殊金属(株)

• 梅田 正和

  住友特殊金属(株)

• 山下 治

  住友特殊金属(株)

書誌事項

タイトル別名

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

抄録

FeSi₂ alloys doped with Mn or Co (p-type Fe_0.92Mn_0.08Si₂, n-type Fe_0.98Co_0.02Si₂) 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.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 45 (9), 866-871, 1998

  一般社団法人 粉体粉末冶金協会

キーワード

• thermoelectric
• Fe-Si alloy
• β-FeSi<SUB>2</SUB>
• spray drying

詳細情報

• CRID: 1390282681285995904
• NII論文ID: 10002052865
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.45.866
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 4566311
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4566311
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可