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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:02 |
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Conference: Bucharest University Faculty of Physics 2009 Meeting
Section: Atomic and Molecular Physics; Astrophysics
Title:
X-ray diffraction analysis of spinel aluminates glass-ceramic powders synthesized from a NiO – MgO – Al2O3 – SiO2 glass precursor
Authors:
N. A. Crivat*, E. Borca
Affiliation:
University of Bucharest, Faculty of Physics
Department of Atomic and Nuclear Physics
POBox MG-11, Bucharest-Măgurele
*Erasmus exchange student at University Pierre and Marie Curie, Paris
E-mail
nicole_crivat@yahoo.com
Keywords:
X-ray Diffraction, quantitative phase analysis, glass-ceramic
Abstract:
Glass - ceramic powders were crystallized from glass with chemical composition 2MeO – 2Al2O3 – 5SiO2 (Me = equimolar mixture of Mg and Ni) by annealing at different temperatures between 800 and 1200C. The evolution of structural transformations with annealing temperature was monitored by X-ray diffraction (XRD). Quantitative phase analysis was performed by Rietveld method. The XRD analysis revealed that the first crystalline phase is Mg-containing aluminate spinel formed after heating up to 950C. In the samples annealed at higher temperatures the Ni-containing aluminate spinel phase is also observed.
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