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A Study on Crystallization Kinetics of Thermoelectric Bi2Se3 Crystals in GeSeBi Chalcogenide Glasses by Differential Scanning Calorimeter

Authors

  • Yinyao Liu,

    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
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  • Shuanglong Yuan,

    Corresponding author
    • Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
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  • Jun Xie,

    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
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  • Futiao Shangguan,

    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
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  • Jing Ren,

    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
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  • Guorong Chen

    1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China
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Author to whom correspondence should be addressed. e-mail: shuanglong@ecust.edu.cn

Abstract

Novel glass-ceramics with embedded thermoelectric Bi2Se3 crystals were prepared from glass matrices in the Ge20Se100−xBix (= 5, 10, 12 mol%) system. Based on DSC results performed at different heating rates, characteristic activation energies (Ec) and Avrami exponents (n) were obtained and analyzed by using Kissinger's relation, Ozawa's method, Augis–Bennett approximation and Matusita–Sakka theory. XRD results showed that pure Bi2Se3 crystalline phase precipitated upon annealing at different temperatures for various time. The crystal size and crystalline fraction in the samples could be tuned by controlling the annealing time.

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