液相－固相反応法で合成したMg₂Si 系化合物の焼結性と熱電特性に及ぼすMg仕込量とB添加量の影響

• 富永 彰

  名古屋大学工学研究科マテリアル理工学専攻

• 伊藤 孝至

  名古屋大学工学研究科マテリアル理工学専攻

書誌事項

タイトル別名

• Influences of Initial Composition of Magnesium and Additive Amount of Boron on Sinterability and Thermoelectric Properties of Mg₂Si Compound Synthesized by Liquid-solid Phase Reaction Method
• 液相-固相反応法で合成したMg₂Si系化合物の焼結性と熱電特性に及ぼすMg仕込量とB添加量の影響
• エキソウ-コソウ ハンノウホウ デ ゴウセイ シタ Mg ₂ Siケイ カゴウブツ ノ ショウケツセイ ト ネツデントクセイ ニ オヨボス Mg シコミリョウ ト B テンカリョウ ノ エイキョウ
• Influences of Initial Composition of Magnesium and Additive Amount of Boron on Sinterability and Thermoelectric Properties of Mg2Si Compound Synthesized by Liquid-solid Phase Reaction Method

抄録

Dimagnesium silicide (Mg₂Si) is a promising n – type thermoelectric compound suitable for thermoelectric power generation using waste heat of intermediate temperature range (600 − 900 K). However, there are two problems in making the Mg₂Si compound. One is difficulty in synthesizing the compound due to ease of Mg evaporation in fusion, resulting in existence of non-reacting Si. Another is difficulty in sintering the synthesized powder. In order to overcome the two problems, we synthesized the Mg₂Si compound on Mg – rich state by the liquid-solid phase reaction and sintered the synthesized powder by the pulse discharge sintering (PDS). The influences of Mg/Si ratio and B addition on the sinterability and the thermoelectric properties of the synthesized Mg₂Si compounds were investigated. The sinterability of the synthesized Mg₂Si compounds were improved by the increase of Mg amount. And, electrical resistivities of sintered samples were decreased by B addition. Therefore, thermoelectric properties were strongly affected by both Mg/Si ratio and B addition. The sample synthesized with feed amount of Mg of 67.00 at% and additive amount of B of 1.0 at% had the maximum dimensionless figure of merit of about 0.39 at 773 K.

収録刊行物

• 粉体および粉末冶金

  粉体および粉末冶金 60 (8), 354-359, 2013

  一般社団法人 粉体粉末冶金協会

キーワード

• dimagnesium silicide
• liquid-solid phase reaction
• pulse discharge sintering
• thermoelectric property
• feed amount of magnesium
• additive amount of boron

詳細情報

• CRID: 1390282681287574784
• NII論文ID: 10031196487
• NII書誌ID: AN00222724
• DOI: 10.2497/jjspm.60.354
• COI: 1:CAS:528:DC%2BC3sXhsVagsL%2FP
• ISSN: 18809014
• ISSN: 05328799
• NDL書誌ID: 024852660
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024852660
• 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