Influence of Spark Plasma Sintering Temperature on Microstructure and Tthermoelectric Properties of Cu-Doped Bi0.5Sb1.495Te3 Compound

• Autorzy: Lee Chul-Hee , Dharmaiah Peyala , Song Jun-Woo , Jeong Kwang-Yong , Hong Soon-Jik

Identyfikatory

DOI

10.24425/amm.2020.133225

• Języki publikacji: EN

Abstrakty

EN

Due to air pollution, global warming and energy shortage demands new clean energy conversion technologies. The conversion of industrial waste heat into useful electricity using thermoelectric (TE) technology is a promising method in recent decades. Still, its applications are limited by the low efficiency of TE materials in the operating range between 400-600 K. In this work, we have fabricated Cu_0.005 Bi_0.5Sb_1.495Te₃ powder using a single step gas atomization process followed by spark plasma sintering at different temperatures (623, 673, 723, and 773 K), and their thermoelectric properties were investigated. The variation of sintering temperature showed a significant impact on the grain size. The Seebeck coefficient values at room temperature increased significantly from 127 μVK to 151 μV/K with increasing sintering temperature from 623 K to 723 K due to decreased carrier concentration. The maximum ZT values for the four samples were similar in the range between 1.15 to 1.18 at 450 K, which suggest these materials could be used for power generation in the mid-temperature range (400-600 K).

Słowa kluczowe

EN

bismuth antimony telluride; gas atomization; spark plasma sintering; microstructure; thermoelectric materials

• 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: 2020
• Tom: Vol. 65, iss. 3
• Strony: 1105--1110
• Opis fizyczny: Bibliogr. 20 poz., fot., rys., wzory

Twórcy

autor

Lee Chul-Hee

• Kongju National University, Division of Advanced Materials Engineering, 275, Budae-dong, Cheonan City, Chungcheongnam-do, 330-717, Republic of Korea

autor

Dharmaiah Peyala

• Kongju National University, Division of Advanced Materials Engineering, 275, Budae-dong, Cheonan City, Chungcheongnam-do, 330-717, Republic of Korea

autor

Song Jun-Woo

• Kongju National University, Division of Advanced Materials Engineering, 275, Budae-dong, Cheonan City, Chungcheongnam-do, 330-717, Republic of Korea

autor

Jeong Kwang-Yong

• Kongju National University, Division of Advanced Materials Engineering, 275, Budae-dong, Cheonan City, Chungcheongnam-do, 330-717, Republic of Korea

autor

Hong Soon-Jik

• Kongju National University, Division of Advanced Materials Engineering, 275, Budae-dong, Cheonan City, Chungcheongnam-do, 330-717, Republic of Korea

Bibliografia

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Uwagi

EN

1. This work was supported by the Basic Research Laboratory Program through the Ministry of Education of the Republic of Korea (2019R1A4A1026125). This work was supported by the National Research Council of Science & Technology (NST) grant by the Korea government (MSIP) (No. CRC-15-06-KIGAM).

PL

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).