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Characterization of the Aluminas Formed During the Thermal Decomposition of Boehmite by the Rietveld Refinement Method

AuthorsJiménez, José Antonio; Padilla, Isabel ; López-Delgado, Aurora ; Fillali, Laila; López-Andrés, Sol
KeywordsThermal decomposition
Crystalline phases
Characterization aluminas
Issue DateJun-2014
CitationInternational Journal of Applied Ceramic Technology: 1-9 (2014)
AbstractBoehmite synthesized through a sol-gel route from a nonconventional raw material, as an aluminum waste, was calcined at temperatures between 500 and 1500°C. Quantification of crystalline phases was performed by the Rietveld refinement of the XRD patterns. ¿-Al2O3 is formed at 500°C, and up to 1000°C, is the dominant phase. At temperatures ranging from 1000 to 1400°C, it was observed the appearance of a four-phase region. The complete transformation into ¿-Al2O3 lasts until 12 h at 1400°C or at higher temperatures. The presence of an amorphous phase in calcined samples was confined by direct comparison with a standard of pure ¿-Al2O3.
Publisher version (URL)http://dx.doi.org/10.1111/ijac.12283
Appears in Collections:(CENIM) Artículos
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