Novel glass-ceramics with embedded thermoelectric Bi2Se3 crystals were prepared from glass matrices in the Ge20Se100−xBix (x = 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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