Scholarlink

<p>In general, any attempt to increase the Seebeck coefficient is usually accompanied by a decrease in the electrical conductivity or vice versa due to the interplay between these two parameters. This work demonstrates that a simultaneous increase in both the Seebeck coefficient and electrical conductivity can be obtained by “doping” in intermetallic alloys. A new alloy composition, Fe<sub>10</sub>Cr<sub>1</sub>Ti<sub>3</sub>Al<sub>6</sub>, was synthesized by substituting Fe with Cr in Fe<sub>11</sub>Ti<sub>3</sub>Al<sub>6</sub> using mechanical alloying and spark plasma sintering (SPS). The thermoelectric measurements revealed that the Cr substitution led to an increase in the Seebeck coefficient from +27&#xa0;µV/K in Fe<sub>11</sub>Ti<sub>3</sub>Al<sub>6</sub> to +39&#xa0;µV/K in Fe<sub>10</sub>Cr<sub>1</sub>Ti<sub>3</sub>Al<sub>6</sub>, with a corresponding increase in the electrical conductivity from 2.5 × 10<sup>5</sup> S/m to 4.7 × 10<sup>5</sup> S/m, resulting in a significant increase in the power factor. The temperature dependence of the thermoelectric properties of this new alloy was also investigated over a temperature range of 50–727°C. The result showed that a maximum power factor of 6.0 × 10<sup>−4</sup> W/m&#xa0;K<sup>2</sup> was obtained at 53°C.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Improving the Seebeck Coefficient and Electrical Conductivity of Fe11Ti3Al6 by Substituting Fe with Cr

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年1月10日

查看全文
  • Sukhwinder Singh,
  • Joseph Alemzadeh,
  • Guillermo Menendez Rodriguez,
  • Matthew Phillips,
  • Daniel Zabek,
  • Matthew Burton,
  • Victoria G. Rocha,
  • Gao Min

摘要

In general, any attempt to increase the Seebeck coefficient is usually accompanied by a decrease in the electrical conductivity or vice versa due to the interplay between these two parameters. This work demonstrates that a simultaneous increase in both the Seebeck coefficient and electrical conductivity can be obtained by “doping” in intermetallic alloys. A new alloy composition, Fe10Cr1Ti3Al6, was synthesized by substituting Fe with Cr in Fe11Ti3Al6 using mechanical alloying and spark plasma sintering (SPS). The thermoelectric measurements revealed that the Cr substitution led to an increase in the Seebeck coefficient from +27 µV/K in Fe11Ti3Al6 to +39 µV/K in Fe10Cr1Ti3Al6, with a corresponding increase in the electrical conductivity from 2.5 × 105 S/m to 4.7 × 105 S/m, resulting in a significant increase in the power factor. The temperature dependence of the thermoelectric properties of this new alloy was also investigated over a temperature range of 50–727°C. The result showed that a maximum power factor of 6.0 × 10−4 W/m K2 was obtained at 53°C.