Compression behavior of nanocrystalline anatase TiO2

被引：72

作者：

Swamy, V

Dubrovinsky, LS

Dubrovinskaia, NA

Simionovici, AS

Drakopoulos, M

Dmitriev, V

Weber, HP

机构：

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

[2] Ecole Polytech, CRCT, Montreal, PQ H3C 3A7, Canada

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

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

来源：

SOLID STATE COMMUNICATIONS | 2003年 / 125卷 / 02期

关键词：

nanocrystals; phase transition; bulk modulus; high-pressure;

D O I：

10.1016/S0038-1098(02)00601-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present a synchrotron X-ray diffraction study of pressure-induced changes in nanocrystalline anatase (with a crystallite size of 30-40 nm) to 35 GPa. The nanoanatase was observed to a pressure above 20 GPa. Direct transformation to the baddeleyite-TiO2 polymorph was seen at 18 GPa. A fit of the pressure versus volume data to a Birch-Murnaghan equation yielded the following parameters: zero-pressure volume, V-0 = 136.15 Angstrom(3), bulk modulus, K-T = 243(3) GPa, and the pressure derivative of bulk modulus, K' = 4 (fixed). The bulk modulus value obtained for the nanocrystalline anatase is about 35% larger than that of the macrocrystalline counterpart. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：111 / 115

页数：5

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