Thermoelectric properties and cost optimization of spark plasma sintered n-type Si0.9Ge0.1 - Mg2Si nanocomposites

Описание

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1016/j.scriptamat.2017.12.019

Ключевые слова: Germanium, Magnesium silicide, Mechanical alloying, Nanocomposite, Silicon, Spark plasma sintering, Thermoelectric materials

Аннотация: We report on thermoelectric properties of low Ge content n-type Si0.9Ge0.1–Mg2Si nanocomposite. Introduction of the Mg2Si phase into a SiGe matrix resulted in a dramatic drop of the lattice thermal conductivity beyond the previously reported lowest limit for SiGe alloys due to intensification of phonon scattering on SiGe–Mg2Si graiПоказать полностьюn boundaries. For a sample doped with 1 at.% of Mg2Si, the peak value of thermoelectric figure of merit ZT reached ~ 0.8 at 800 °C. Sintered nanocomposites still exhibit high thermoelectric performance while being almost two times cheaper than Si0.8Ge0.2. © 2017

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Издание

Журнал: Scripta Materialia

Выпуск журнала: Vol. 146

Номера страниц: 295-299

ISSN журнала: 13596462

Издатель: Acta Materialia Inc

Авторы

  • Usenko A. (National University of Science and Technology “MISiS”, Moscow, Russian Federation)
  • Moskovskikh D. (National University of Science and Technology “MISiS”, Moscow, Russian Federation)
  • Korotitskiy A. (National University of Science and Technology “MISiS”, Moscow, Russian Federation)
  • Gorshenkov M. (National University of Science and Technology “MISiS”, Moscow, Russian Federation)
  • Zakharova E. (National University of Science and Technology “MISiS”, Moscow, Russian Federation)
  • Fedorov A. (Siberian Federal University, Krasnoyarsk, Russian Federation, Kirensky Institute of Physics, Krasnoyarsk, Russian Federation)
  • Parkhomenko Y. (National University of Science and Technology “MISiS”, Moscow, Russian Federation)
  • Khovaylo V. (National University of Science and Technology “MISiS”, Moscow, Russian Federation, National Research South Ural State University, Chelyabinsk, Russian Federation)

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