Small-angle x-ray scattering studies of early-stage colloid formation by thermohydrolytic polymerization of aqueous zirconyl salt solutions
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6224 (United States)
Early-stage processes involving the polymerization of zirconium species in aqueous solutions at elevated temperatures ({approximately}100{degree}C) as well as colloid formation were studied. Small-angle x-ray scattering (SAXS) data were analyzed via Guinier, {open_quotes}longrods,{close_quotes} and Porod plots to determine particle growth kinetics and morphology. Our SAXS data suggest that zirconium tetramers and octamers polymerize into larger clusters and elongated-rod-(or needle)-shaped primary particles, which have a length of a few nanometers and a radius of gyration of cross section between 4 and 5 {Angstrom}. Cube-shaped particles are aggregates of the needlelike primary particles. The transition from zirconium tetramer to a colloidal sol particle follows a mass-fractal growth (1{lt}fractal dimension, D{lt}3). {copyright} {ital 1999 Materials Research Society.}
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-96OR22464
- OSTI ID:
- 324919
- Journal Information:
- Journal of Materials Research, Vol. 14, Issue 1; Other Information: PBD: Jan 1999
- Country of Publication:
- United States
- Language:
- English
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