Small-angle x-ray scattering studies of early-stage colloid formation by thermohydrolytic polymerization of aqueous zirconyl salt solutions

被引：35

作者：

Hu, MZC ^{[1
]}

Zielke, JT ^{[1
]}

Lin, JS ^{[1
]}

Byers, CH ^{[1
]}

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF MATERIALS RESEARCH | 1999年 / 14卷 / 01期

关键词：

D O I：

10.1557/JMR.1999.0017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Early-stage processes involving the polymerization of zirconium species in aqueous solutions at elevated temperatures (similar to 100 degrees C) as well as colloid formation were studied. Small-angle x-ray scattering (SAXS) data were analyzed via Guinier, "longrods," and Pored 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 < fractal dimension, D < 3).

引用

页码：103 / 113

页数：11

共 40 条

[1] O-17 AND H-1-NMR STUDY OF THE TETRANUCLEAR HYDROXO ZIRCONIUM COMPLEX IN AQUEOUS-SOLUTION [J].