Synthesis of Polycrystalline Bi-Doped SnSe by Mechanical Alloying and Hydrogen Reduction

• Autorzy: Jang Jin Kwang , Moon Jaeyun , Byun Jongmin

Identyfikatory

DOI

10.24425/amm.2024.147800

• Języki publikacji: EN

Abstrakty

EN

In this study, Bi-doped SnSe was fabricated through the high energy ball milling and the hydrogen reduction of Bi₂O₃, and its thermoelectric properties were analyzed. The specimen with pure-Bi was fabricated as a control group and properties were compared. In the case of specimens with added Bi₂O₃, when sintering was performed in a hydrogen atmosphere, Bi₂O₃ with a high melting point was reduced to Bi with a relatively low melting point. At this time, because of the appearance of the liquid phase, the orientation of the (400) plane increased, and the density was improved. As a result, the change of SnSe to n-type was confirmed in the temperature range of 300 K - 773 K due to Bi doping. Additionally, when Bi₂O₃ was used instead of pure-Bi, the thermal conductivity, which is inversely proportional to the figure of merit, decreased, and the electrical conductivity increased, resulting in an improvement in the figure of merit.

Słowa kluczowe

EN

SnSe; thermoelectric properties; hydrogen reduction; N-type; Bi2O3

• 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: 2024
• Tom: Vol. 69, iss. 1
• Strony: 129--133
• Opis fizyczny: Bibliogr. 19 poz., fot., rys., tab.

Twórcy

autor

Jang Jin Kwang

• Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea

• https://orcid.org/0009-0008-9740-6053

autor

Moon Jaeyun

• University of Nevada, Las Vegas, Department of Mechanical Engineering, 4505 S. Maryland Pkwy Las Vegas, Nv 89154, United States

• https://orcid.org/0000-0003-0128-4108

autor

Byun Jongmin

• Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea
• Seoul National University of Science and Technology, The Institute of Powder Technology, Seoul 01811, Republic of Korea

• https://orcid.org/0000-0002-0354-237X

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Uwagi

This study was supported by the Research Program funded by SeoulTech (Seoul National University of Science and Technology).