TY - JOUR
T1 - Hydrolysis, condensation, and tetragonal phase formation in sol-gel zirconia prepared with electron-irradiated alkoxide solutions
AU - Bokhimi, Xim
AU - Muñoz, Eduardo
AU - Boldú, José Luis
AU - Adem, Esbaide
AU - Novaro, Octavio
AU - López, Tessy
AU - Rojas, Fernando
AU - Gómez, Ricardo
AU - García-Ruiz, Amado
N1 - Funding Information:
We would like to thank Mr. A. Morales and Mr. M. Aguilar for technical assistance, and the CONACyT and FIES-IMP, Mexico, for financial support.
PY - 2000
Y1 - 2000
N2 - Sol-gel zirconia precursor, zirconium n-butoxide in ter-butanol, was irradiated with 1.3 MeV electrons to a dose of 330 KGy. Gelling was instantaneously produced when an aqueous solution of sulfuric, hydrochloric or acetic acid was added to the irradiated solution; no hydrolysis catalyst was required. Samples were characterized with X-ray powder diffraction, infrared spectroscopy, and electron paramagnetic resonance. The electron irradiation accelerated hydrolysis and condensation, which avoided the stabilization of the tetragonal phase via carboxyls, and decreased the capability of sulfate ions to stabilize it. These results suggest that the stabilization of the tetragonal phase of sol-gel zirconia via carboxyl and sulfate ions depends on their diffusion in the sol.
AB - Sol-gel zirconia precursor, zirconium n-butoxide in ter-butanol, was irradiated with 1.3 MeV electrons to a dose of 330 KGy. Gelling was instantaneously produced when an aqueous solution of sulfuric, hydrochloric or acetic acid was added to the irradiated solution; no hydrolysis catalyst was required. Samples were characterized with X-ray powder diffraction, infrared spectroscopy, and electron paramagnetic resonance. The electron irradiation accelerated hydrolysis and condensation, which avoided the stabilization of the tetragonal phase via carboxyls, and decreased the capability of sulfate ions to stabilize it. These results suggest that the stabilization of the tetragonal phase of sol-gel zirconia via carboxyl and sulfate ions depends on their diffusion in the sol.
UR - http://www.scopus.com/inward/record.url?scp=0343953468&partnerID=8YFLogxK
U2 - 10.1023/A:1008764005816
DO - 10.1023/A:1008764005816
M3 - Artículo
SN - 0928-0707
VL - 17
SP - 219
EP - 225
JO - Journal of Sol-Gel Science and Technology
JF - Journal of Sol-Gel Science and Technology
IS - 3
ER -