Characterization and Preparation of Nanostructured Al2Fe3Si3 Thermoelectric Materials

ZhiYang Zhao; Teruyuki Ikeda

doi:10.3390/ma18225193

November 15, 2025MaterialsOpen Access

Characterization and Preparation of Nanostructured Al2Fe3Si3 Thermoelectric Materials

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Key Points

The materials demonstrate low lattice thermal conductivities, achieving values around 5 W/mK.
Utilization of high-energy ball milling and spark plasma sintering for material synthesis.
Oxides and other phases such as FeSi or Al2Fe3Si4 were identified at the nanoscale.
The findings suggest that improved phonon scattering can enhance thermoelectric properties.

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Implication

Nanostructured Al2Fe3Si3 composite exhibits low lattice thermal conductivities, indicating effective phonon scattering during spark plasma sintering.

Abstract

A nanostructured Al2Fe3Si3 composite has been synthesized by high-energy ball milling followed by spark plasma sintering. Formations of oxides and FeSi or Al2Fe3Si4 phases in nanometer-size scales were observed in addition to the matrix Al2Fe3Si3 phase. Because of enhanced phonon scattering, the materials show low lattice thermal conductivities such as ~5 W/mK at the minimum.

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Cite This Study

Zhao et al. (2025) studied this question.

synapsesocial.com/papers/69251994c0ce034ddc353834 https://doi.org/10.3390/ma18225193

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Characterization and Preparation of Nanostructured Al2Fe3Si3 Thermoelectric Materials

Key Points

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Abstract

Discussion

Cite This Study

Characterization and Preparation of Nanostructured Al2Fe3Si3 Thermoelectric Materials

Key Points

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Implication

Abstract

Discussion

Cite This Study

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