Abstract
Abstract Present research work is focused on thermal analysis of bismuth telluride nanostructure for the evaluation of material properties such as oxidation, recrystallization, thermal stability, melting point etc. From the literature, Bi2Te3 is the most promising material for thermoelectric power generation and refrigeration application. Nanostructured Bismuth telluride is prepared via hydrothermal method at various hot air oven conditions. Synthesized material is characterized through XRD, SEM, TEM, AFM and FESEM. XRD results are showed the maximum intensity peak at 27.6° with (015) preferred plane. SEM results shows the formation of nanoflower and nanorods at 155 ℃ and 210 ℃ respectively. Next, DSC, DTA and TGA analysis from RT to 812 ℃ are carried out in N2 and Air environment. Only one peak at 521 ℃ is found in DSC curve indicating that phase transition or crystallization of the material and mass loss is 0.234 mg/min. When we did the DSC, DTA and DTG in air environment, we found the three peaks at 384 ℃, 461 ℃, and 509 ℃. First peak indicates oxidation due to the presence of moisture in sample and other two peaks shows the phase transition of the material. Material is decomposed at 511℃ as observed in TG curve.
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