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Zirconium Oxide Structure Prepared by the Sol–Gel Route: I, The Role of the Alcoholic Solvent
Author(s) -
Caracoche María C.,
Rivas Patricia C.,
Cervera Mario M.,
Caruso Ricardo,
Benavídez Edgardo,
Sanctis* Oscar,
Escobar Marta E.
Publication year - 2000
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2000.tb01200.x
Subject(s) - monoclinic crystal system , cubic zirconia , zirconium , tetragonal crystal system , solvent , materials science , dissolution , methanol , phase (matter) , activation energy , hydrolysis , ethanol , alcohol , chemical engineering , inorganic chemistry , crystallography , chemistry , nuclear chemistry , organic chemistry , crystal structure , metallurgy , ceramic , engineering
Sol–gel‐derived powder samples of zirconia (ZrO 2 ) prepared via the dissolution of zirconium n ‐propoxide in methanol, ethanol, and 2‐propanol have been characterized mainly using perturbed angular correlations spectroscopy, as a function of temperature. Results indicate that the nanostructures and subsequent thermal evolution are alcohol dependent: the shorter the alcohol chain, the more hydrolyzed the product. ZrO 2 powder that has been obtained using ethanol as the solvent is the product that exhibits the better stabilization of the metastable tetragonal phase ( t ‐phase). It undergoes a clear and detailed t 1 ‐form → t 2 ‐form → monoclinic ZrO 2 thermal transformation and shows the highest activation energy against the transformation to the monoclinic phase.