Thermodynamic analysis of phase stability of nanocrystalline titania

被引：1139

作者：

Zhang, HZ ^{[1
]}

Banfield, JF ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Geol & Geophys, Madison, WI 53706 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY | 1998年 / 8卷 / 09期

关键词：

D O I：

10.1039/a802619j

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 phase stability of nanocrystalline anatase and rutile was analyzed thermodynamically. According to the present analysis, anatase becomes more stable than rutile when the particle size decreases below ca. 14 nm. The calculated phase boundary between nanocrystalline anatase and rutile coincides with the experimental data for appearance of rutile during coarsening of nanocrystalline anatase. Both surface free energy and surface stress play important roles in the thermodynamic phase stability, which is a function of particle size.

引用

页码：2073 / 2076

页数：4

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