Size effects on the structure and phase transition behavior of baddeleyite TiO2

被引：33

作者：

Swamy, V

Dubrovinsky, LS

Dubrovinskaia, NA

Langenhorst, F

Simionovici, AS

Drakopoulos, M

Dmitriev, V

Weber, HP

机构：

[1] Monash Univ, Sch Phys & Mat Engn, Clayton, Vic 3800, Australia

[2] Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany

[3] European Synchrotron Radiat Facil, SNBL, F-38043 Grenoble, France

来源：

SOLID STATE COMMUNICATIONS | 2005年 / 134卷 / 08期

关键词：

nanostructured materials; high-pressure; phase transition;

D O I：

10.1016/j.ssc.2005.02.035

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

High-pressure structural transitions in nanocrystalline systems are of significant interest as models of first-order phase transitions. We demonstrate size-induced lattice expansion and significant atomic rearrangements in the crystal structure of nanocrystalline high-pressure baddeleyite-TiO2. The alpha-PbO2 structured TiO2 recovered after dozens of pressure cycles in the alpha-PbO2-baddeleyite pressure field displayed elongate 25-35 nm crystallites, compared to starting 34-nm anatase crystallites, suggesting crystallite coherency across anatase, baddeleyite, and alpha-PbO2 structures and 'single structural domain' behavior of the nanocrystalline system. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：541 / 546

页数：6