Microstructure and Thermoelectric Properties of Doped FeSi₂ with Addition of B₄C Nanoparticles

• Autorzy: Dąbrowski Franciszek , Ciupiński Łukasz , Zdunek Joanna , Chromiński Witold , Kruszewski Mirosław , Zybala Rafał , Michalski A. , Kurzydłowski Krzysztof J.

Identyfikatory

DOI

10.24425/amm.2021.136436

• Języki publikacji: EN

Abstrakty

EN

β-FeSi₂ with the addition of B₄C nanoparticles was manufactured by sintering mechanically alloyed Fe and Si powders with Mn, Co, Al, P as p and n-type dopants. The consolidated samples were subsequently annealed at 1123 K for 36 ks. XRD analysis of sinters after annealing confirmed nearly full transformation from α and ε into thermoelectric β-FeSi₂ phase. SEM observations of samples surface were compliant with the diffraction curves. TEM observations allowed to depict evenly distributed B₄C nanoparticles thorough material, with no visible aggregates and establish grain size parameter d₂ < 500 nm. All dopants contributed to lower thermal conductivity and Seebeck coefficient, with Co having strongest influence on increasing electrical conductivity in relation to reference FeSi₂. Combination of the addition of Co as dopant and B₄C nanoparticles as phonon scatterer resulted in dimensionless figure of merit ZT reaching 7.6 × 10^-2 at 773 K for Fe_0.97Co_0.03Si₂ compound. Comparison of the thermoelectric properties of examined sinters to the previously manufactured of the same stoichiometry but without B₄C nanoparticles revealed theirs overall negative influence.

Słowa kluczowe

EN

iron disilicide; nanoparticles; thermoelectrics

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2021
• Tom: Vol. 66, iss. 4
• Strony: 1157--1162
• Opis fizyczny: Bibliogr. 32 poz., fot., rys., tab.

Twórcy

autor

Dąbrowski Franciszek

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warszawa, Poland

• https://orcid.org/0000-0001-8555-3680

autor

Ciupiński Łukasz

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warszawa, Poland

• https://orcid.org/0000-0002-4536-3177

autor

Zdunek Joanna

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warszawa, Poland

• https://orcid.org/0000-0001-8549-5214

autor

Chromiński Witold

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warszawa, Poland

• https://orcid.org/0000-0002-5345-7667

autor

Kruszewski Mirosław

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warszawa, Poland

• https://orcid.org/0000-0002-2576-9006

autor

Zybala Rafał

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warszawa, Poland
• Łukasiewicz Research Network, Institute of Microelectronics and Photonics, 32/46, Lotników Str., 02-668 Warszawa, Poland

• https://orcid.org/0000-0002-6538-6632

autor

Michalski A.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, 141 Wołoska Str., 02-507 Warszawa, Poland

autor

Kurzydłowski Krzysztof J.

• https://orcid.org/0000-0003-3875-4820

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Uwagi

1. This work was conducted at Faculty of Materials and Engineering Warsaw University of Technology within the National Science Centre, Poland PRELUDIUM 7 grant entitled “The influence of dopants, nanoparticles, texture and manufacturing methods on thermoelectric properties of carbon disilicide” (2014/13/N/ST8/00619) and also supported by National Centre for Research and Development (NCBR, Poland) within a framework of the project entitled “Innovative thermoelectric modules for energy harvesting” (PBS3/A5/49/2015).

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).