ZnSbの熱電的性質の改良および焼結による製造について

• 牧野 昇

  三菱製鋼株式会社

• 木村 康夫

  三菱製鋼株式会社

• 鈴木 正樹

  三菱製鋼株式会社

書誌事項

タイトル別名

• Improvement of Thermoelectric Properties of ZnSb and its Preparation by Sintering
• ZnSb ノ ネツデンテキ セイシツ ノ カイリョウ オヨビ ショウケツ ニ ヨル セイゾウ ニ ツイテ

抄録

The effect of the simultaneous addition of Ag, Sn and Bi, totaing 4 wt%, on thermoelectric properties of a ZnSb alloy containing 47 to 54 at%Zn has been studied. ZnSb containing 53 to 54 at%Zn gives a good result. The highest value of the figure of merit Z, 1.34×10⁻³°K⁻¹, was obtained with the specimen containing 54 at%Zn in the base alloy and with additional elements, 2 wt%Ag, 1 wt%Sn and 1 wt%Bi. Also the specimen, 53 at%Zn in the base alloy and 2 wt%Ag and 2 wt%Sn added, has a Z value of almost the same as that of the above mentioned specimen. An approximate relation, σ=4000×exp(−0.016α), is found between α and σ of the alloys, but several specimens show a more favorable combination of α and σ. From this relation, it is expected that alloys having α of about 125 μV/°C will have a higher Z value, and in fact, this has been confirmed. However, the specimen having the α value of 174 μV/°C has also a very high Z value, in agreement with Ioffe’s theoretical prediction. According to our experimental data, the K_L of ZnSb compound is estimated to be about 0.012 W °C⁻¹ cm⁻¹, but K_L seems to be reduced to about one half by the (Ag, Sn, Bi)-addition. Within the temperature range from room temperature up to 350°C, α increases with increasing temperature, while σ decreases. Combining these measured temperature variations of α and σ with presumed that of K, Z is expected to rise slowly with temperature and to exhibit the highest value between 200° and 300°C.<BR>The process for preparing the ZnSb specimen by sintering has also been studied. Sintering is most satisfactorily carried out at the temperature of 25° to 30°C below the melting point of the alloy. The specimens thus prepared process the Z values equal to or even higher than those of specimens of the same composition and prepared by melting, quenching and annealing.

収録刊行物

• 日本金属学会誌

  日本金属学会誌 29 (3), 205-210, 1965

  公益社団法人 日本金属学会

キーワード

• Materials Chemistry
• Metals and Alloys
• Mechanics of Materials
• Condensed Matter Physics

詳細情報

• CRID: 1390001206481941120
• NII論文ID: 130007333646
• NII論文ID: 40018255707
• NII論文ID: 10004165357
• NII書誌ID: AN00187860
• DOI: 10.2320/jinstmet1952.29.3_205
• ISSN: 18806880
• ISSN: 24337501
• ISSN: 00214876
• NDL書誌ID: 8371030
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8371030
• Web Site: https://www.jstage.jst.go.jp/article/jinstmet1952/29/3/29_3_205/_pdf
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