FRACTAL STRUCTURE OF HEMATITE AGGREGATES

被引：93

作者：

AMAL, R

RAPER, JA

WAITE, TD

机构：

[1] AUSTRALIAN NUCL SCI & TECHNOL ORG,PRIVATE MAIL BAG 1,MENAI,NSW,AUSTRALIA

[2] UNIV NEW S WALES,SCH CHEM ENGN,KENSINGTON,NSW 2033,AUSTRALIA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1990年 / 140卷 / 01期

关键词：

D O I：

10.1016/0021-9797(90)90331-H

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structure of hematite aggregates, considered to behave as fractal objects, is studied using static light scattering methods. The fractal dimension obtained from the scattering exponent is found to be dependent on the aggregation mechanism and it ranges from 2.3 for rapid (diffusion limited) to 2.8 for slow (reaction limited) aggregation. Polydispersity and restructuring of aggregates do not affect the relationship between scattering exponent and fractal dimension in these aggregates. Excellent correspondence over a range of temperatures and ionic strengths is obtained between results of experiments using dynamic light scattering to determine aggregation kinetics and those predicted using a modified Smoluchowski model incorporating fractal dimensions. © 1990.

引用

页码：158 / 168

页数：11

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