Effects of aging on nanocrystalline anatase-to-rutile phase transformation kinetics

被引：45

作者：

Hsiang, Hsing-I ^{[1
]}

Lin, Shih-Chung ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Particulate Mat Res Ctr, Dept Resources Engn, Tainan 70101, Taiwan

来源：

CERAMICS INTERNATIONAL | 2008年 / 34卷 / 03期

关键词：

kinetics; rutile; anatase; phase transformation; aging;

D O I：

10.1016/j.ceramint.2006.12.004

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of aging on the kinetics for nanocrystalline anatase-to-rutile phase transformation were investigated. The agglomeration and crystallite sizes for TiO2 gels decreased with increasing aging treatment. For unaged samples, the agglomeration number was high, so that there are a larger number of anatase crystallites and crystallite-crystallite anatase contacts in each cluster. This promotes interfacial nucleation. Therefore, the activation energy of nucleation calculated for unaged samples was smaller than that for those found for the aged ones. (C) 2007 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：557 / 561

页数：5

共 20 条

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