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has been cited by the following article:

• TITLE: Phase Transition Behavior of Nanocrystalline Al2O3 Powders

  AUTHORS: Balaraman Sathyaseelan, Iruson Baskaran, Kandasamy Sivakumar

  KEYWORDS: Nanocrystalline Al2O3; Phase Transitions; γ-Al2O3; α-Al2O3; Differential Scanning Calorimetry (DSC); Electron Microscopy (TEM and SEM)

  JOURNAL NAME: Soft Nanoscience Letters, Vol.3 No.4, October 11, 2013

  ABSTRACT: Alumina (Al2O3) has been synthesized through combustion synthesis (CS) technique. The calcined products were characterized using X-ray diffractional analysis (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermo-gravimetric analysis (TGA). TG-DTA results reveal the various stages involved in transition from γ-phase to α-Al2O3 phase. The first phase γ-Al2O3 was presented in the temperature range from 600°C-875°C as deduced from the XRD patterns with cubic crystal structure. The second stage occurs in the temperature range from 900°C-1000°C. In the final step, above 1000°C, the aluminium oxide appears completely as α-Al2O3, showing high crystallinity. The particle sizes are closely related to γ- to α-Al2O3 phase transition.