THERMODYNAMIC ANALYSIS OF PHASE-STABILITY OF NANOCRYSTALLINE TITANIA

Authors
ZHANG HZ BANFIELD JF
Citation
Hz. Zhang et Jf. Banfield, THERMODYNAMIC ANALYSIS OF PHASE-STABILITY OF NANOCRYSTALLINE TITANIA, Journal of materials chemistry (Print), 8(9), 1998, pp. 2073-2076
Citations number
14
Categorie Soggetti
Chemistry Physical","Material Science
Journal title
Journal of materials chemistry (Print) → ACNP
ISSN journal
09599428
Volume
8
Issue
9
Year of publication
1998
Pages
2073 - 2076
Database
ISI
SICI code
0959-9428(1998)8:9<2073:TAOPON>2.0.ZU;2-8
Abstract
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 st ability, which is a function of particle size.