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    Thermoelectric behavior of Bi2Te2.55Se0.45 with a tunable seebeck coefficient: A comparison between coarse needle-like structure and bulk nanostructured alloys

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    1-s2.0-S2238785423025395-main.pdf (3.405Mb)
    Date
    2023
    Author
    El-Makaty, Farah M.
    Shakoor, R.A.
    Hammuda, Abdelmagid
    Youssef, Khaled M.
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    Abstract
    In this study, we compare the thermoelectric properties of coarse-grained n-type Bi2Te2.55Se0.45 alloy prepared by induction melting with the bulk-nanostructured prepared by ball milling and hot-pressing techniques. The corresponding thermoelectric properties showed different behavior for each material processed using different routes. The most striking result of the study is observing a p-type behavior and charge carrier transition from p-to n-type for the coarse-grained alloy. These observed phenomena are related mainly to the unique needle-like microstructure accompanied by high lattice strain. Lastly, the obtained figure-of-merit values for the coarse needle-like structure and bulk nanostructured Bi2Te2.55Se0.45 alloys are 0.20 and 0.80 at their optimum temperatures of 60 and 120 °C, respectively.
    DOI/handle
    http://dx.doi.org/10.1016/j.jmrt.2023.10.087
    http://hdl.handle.net/10576/61099
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    • Center for Advanced Materials Research [‎1522‎ items ]
    • Materials Science & Technology [‎318‎ items ]
    • Mechanical & Industrial Engineering [‎1472‎ items ]

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