Effects of Milling Duration on the Thermoelectric Properties of n-Type Bi2Te2.7Se0.3

• Autorzy: Park Min-Soo , Koo Hye-Young , Park Yonh-Ho , Ha Gook-Hyun

Identyfikatory

DOI

10.24425/amm.2019.127583

• Języki publikacji: EN

Abstrakty

EN

In this study, an oxide reduction process and a reduction-sintering process were employed to synthesize a thermoelectric alloy from three thermoelectric composite oxide powders, and the thermoelectric properties were investigated as a function of the milling duration. Fine grain sizes were analyzed by via X-ray diffraction and scanning electron microscopy, to investigate the influence of the milling duration on the synthesized samples. It was found that microstructural changes, the Seebeck coefficient, and the electrical resistivity of the compounds were highly dependent on the sample milling duration. Additionally, the carrier concentration considerably increased in the samples milled for 6 h; this was attributed to the formation of antisite defects introduced by the accumulated thermal energy. Moreover, the highest value of ZT (=1.05) was achieved at 373K by the 6-h milled samples. The temperature at which the ZT value maximized varied according to the milling duration, which implies that the milling duration of the three thermoelectric composite oxide powders should be carefully optimized for their effective application.

Słowa kluczowe

EN

thermoelectric; bismuth telluride; powder; milling

• 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: 2019
• Tom: Vol. 64, iss. 2
• Strony: 591--595
• Opis fizyczny: Bibliogr. 15 poz., fot., rys.

Twórcy

autor

Park Min-Soo

• Korea Institute of Materials Science, Metal Powder Department, 797 Changwon-daero, Changwon-si, Gyeongnam 51508, Republic of Korea
• Pusan National University, Department of Materials Engineering, 2, Busandaehak-ro 63 Beon-gil, Geumjeong-gu, Busan, 46241

autor

Koo Hye-Young

• Korea Institute of Materials Science, Metal Powder Department, 797 Changwon-daero, Changwon-si, Gyeongnam 51508, Republic of Korea

autor

Park Yonh-Ho

• Pusan National University, Department of Materials Engineering, 2, Busandaehak-ro 63 Beon-gil, Geumjeong-gu, Busan, 46241

autor

Ha Gook-Hyun

• Korea Institute of Materials Science, Metal Powder Department, 797 Changwon-daero, Changwon-si, Gyeongnam 51508, Republic of Korea

Bibliografia

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Uwagi

EN

1. This study was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP, Grant No. 20172010000830), the Korea Evaluation Institute Of Industrial Technology (KEIT, Grant No. 10051011), and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea.

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).