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Structural transitions in alumina nanoparticles by heat treatment

Abstract: ?-alumina nanoparticles were annealed sequentially at 800°C, 950°C and 1100°C and structural transitions as a function of heat treatment were studied by X-ray diffraction (XRD), Differential Scanning Calorimetry (DSC) and 27Al Magic Angle Spinning Nuclear Magnetic Resonance (MAS-NMR) methods.. XRD studies found that ?-Al2O3 is stable upto a temperature of at least 950°C and transforms to the thermodynamically stable a-phase after annealing at 1100°C. MAS-NMR revealed that ?-alumina contains AlO4 and AlO6 structural units in the ratio 1: 2, while a-phase contains only AlO6 units. DSC confirmed that ? ? a transition initiates at 1060°C.

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Authorship: Kaur N., Khanna A., Chen B., González F.,

Congress: DAE Solid State Physics Symposium (60º : 2015 : Uttar Pradesh, India)

Publisher: American Institute of Physics

Publication date: 01/05/2016

No. of pages: 3

Publication type: Conference object

DOI: 10.1063/1.4947632

ISSN: 0094-243X,1551-7616

Publication Url: https://doi.org/10.1063/1.4947632

UCrea Repository Read publication

Authorship

KAUR, NIRMAL

KHANNA. ATUL

CHEN, BANGHAO

JESUS FERNANDO GONZALEZ MARTINEZ

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