Effect of Ga2O3 Nanoparticles Dispersion on Microstructure and Thermoelectric Properties of p-Type BiSbTe Based Alloys

• Autorzy: Kim E.-B. , Koo J.-M. , Hong S.-J.

Identyfikatory

DOI

10.1515/amm-2017-0140

• Języki publikacji: EN

Abstrakty

EN

In this study, p-type Bi_0.5Sb_1.5Te₃ based nanocomposites with addition of different weight percentages of Ga₂O₃ nanoparticles are fabricated by mechanical milling and spark plasma sintering. The fracture surfaces of all Bi_0.5Sb_1.5Te₃ nanocomposites exhibited similar grain distribution on the entire fracture surface. The Vickers hardness is improved for the Bi_0.5Sb_1.5Te₃ nanocomposites with 6 wt% added Ga₂O₃ due to exhibiting fine microstructure, and dispersion strengthening mechanism. The Seebeck coefficient of Bi_0.5Sb_1.5Te₃ nanocomposites are significantly improved owing to the decrease in carrier concentration. The electrical conductivity is decreased rapidly upon the addition of Ga₂O₃ nanoparticle due to increasing carrier scattering at newly formed interfaces. The peak power factor of 3.24 W/mK² is achieved for the base Bi_0.5Sb_1.5Te₃ sintered bulk. TheBi_0.5Sb_1.5Te₃ nanocomposites show low power factor than base sample due to low electrical conductivity.

Słowa kluczowe

EN

thermoelectric properties; Bi0.5Sb1.5Te3 alloys; Seebeck coefficient; mechanical alloying; spark plasma sintering

• 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: 2017
• Tom: Vol. 62, iss. 2B
• Strony: 993--997
• Opis fizyczny: Bibliogr. 20 poz., rys., tab.

Twórcy

autor

Kim E.-B.

• Division of Advanced Materials Engineering and Institute for Rare Metals, Kongju National University, Cheonan, Chungnam, 330-717, Korea

autor

Koo J.-M.

autor

Hong S.-J.

• Division of Advanced Materials Engineering and Institute for Rare Metals, Kongju National University, Cheonan, Chungnam, 330-717, Korea

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).