Effects of Milling Duration on the Thermoelectric Properties of n-Type BI2TE2.7SE0.3
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...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2019-06-01
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| Series: | Archives of Metallurgy and Materials |
| Subjects: | |
| Online Access: | https://journals.pan.pl/Content/111323/PDF/AMM-2019-2-26-Gook-Hyun%20Ha.pdf |
| _version_ | 1811220493135511552 |
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| author | Min-Soo Park Hye-Young Koo Yonh-Ho Park Gook-Hyun Ha |
| author_facet | Min-Soo Park Hye-Young Koo Yonh-Ho Park Gook-Hyun Ha |
| author_sort | Min-Soo Park |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-12T07:42:40Z |
| format | Article |
| id | doaj.art-de99b20e345c49118c77d4717dff3d69 |
| institution | Directory Open Access Journal |
| issn | 2300-1909 |
| language | English |
| last_indexed | 2024-04-12T07:42:40Z |
| publishDate | 2019-06-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Metallurgy and Materials |
| spelling | doaj.art-de99b20e345c49118c77d4717dff3d692022-12-22T03:41:47ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092019-06-01vol. 64No 2591595https://doi.org/10.24425/amm.2019.127583Effects of Milling Duration on the Thermoelectric Properties of n-Type BI2TE2.7SE0.3Min-Soo ParkHye-Young KooYonh-Ho ParkGook-Hyun HaIn 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.https://journals.pan.pl/Content/111323/PDF/AMM-2019-2-26-Gook-Hyun%20Ha.pdfthermoelectricbismuth telluridepowdermilling |
| spellingShingle | Min-Soo Park Hye-Young Koo Yonh-Ho Park Gook-Hyun Ha Effects of Milling Duration on the Thermoelectric Properties of n-Type BI2TE2.7SE0.3 Archives of Metallurgy and Materials thermoelectric bismuth telluride powder milling |
| title | Effects of Milling Duration on the Thermoelectric Properties of n-Type BI2TE2.7SE0.3 |
| title_full | Effects of Milling Duration on the Thermoelectric Properties of n-Type BI2TE2.7SE0.3 |
| title_fullStr | Effects of Milling Duration on the Thermoelectric Properties of n-Type BI2TE2.7SE0.3 |
| title_full_unstemmed | Effects of Milling Duration on the Thermoelectric Properties of n-Type BI2TE2.7SE0.3 |
| title_short | Effects of Milling Duration on the Thermoelectric Properties of n-Type BI2TE2.7SE0.3 |
| title_sort | effects of milling duration on the thermoelectric properties of n type bi2te2 7se0 3 |
| topic | thermoelectric bismuth telluride powder milling |
| url | https://journals.pan.pl/Content/111323/PDF/AMM-2019-2-26-Gook-Hyun%20Ha.pdf |
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