書誌事項
- タイトル別名
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- Low-temperature Fabrication of Polycrystalline .BETA.-FeSi2 Bulk by Reaction of Fe Compact Body with a Na-Si Melt
- Na Siユウエキ ト Fe アップン セイケイタイ ノ ハンノウ ニ ヨル ベータ FeSi2 タケッショウ バルクタイ ノ テイオン ゴウセイ
- Low-temperature Fabrication of Polycrystalline β-FeSi2 Bulk by Reaction of Fe Compact Body with a Na-Si Melt
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Polycrystalline bulk β-FeSi2 samples were prepared by heating a compact body of Fe powder in a Na-Si melt at various conditions, such as density of the Fe compact and the ratio of the source materials. Single-phase bulk β-FeSi2 samples were prepared by heating Fe compact with density below 3.9 g cm-3, Si powder with a Si/Fe molar ratio above 2.25, and Na with a Na/Si molar ratio above 0.33 at 800°C for 12 h. Fe powder reacts with Si dissolved in the Na-Si melt and forms ε-FeSi, followed by changing to β-FeSi2 due to the diffusion of Si while the Na-Si melt soaks into the compact via voids in the compact. Cobalt (Co)-doped β-FeSi2 bulk samples were prepared by heating compact bodies of powder mixtures of Fe powder with grain size of < 45 μm and Co powder with grain sizes of 1-2 μm or < 150 μm in a Na-Si melt. The Co-doped bulk sample prepared with Co powder of 1-2 μm grain size was homogeneous and showed thermoelectric properties better than those of the sample prepared with Co powder of < 150 μm in grain size. It is considered that Co-doped β-FeSi2 is formed by mutual diffusion between β-FeSi2 and Co silicides.
収録刊行物
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- 粉体および粉末冶金
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粉体および粉末冶金 58 (2), 110-115, 2011
一般社団法人 粉体粉末冶金協会
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詳細情報 詳細情報について
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- CRID
- 1390282681288786176
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- NII論文ID
- 10027916252
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- NII書誌ID
- AN00222724
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- COI
- 1:CAS:528:DC%2BC3MXjtFWrtb8%3D
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- ISSN
- 18809014
- 05328799
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- NDL書誌ID
- 11013980
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 抄録ライセンスフラグ
- 使用不可