Compressibility of Nanocrystalline TiO2 Anatase

被引：37

作者：

Al-Khatatbeh, Yahya ^{[1
,2
]}

Lee, Kanani K. M. ^{[2
]}

Kiefer, Boris ^{[3
]}

机构：

[1] Bard Coll Simons Rock, Dept Phys, Great Barrington, MA 01230 USA

[2] Yale Univ, Dept Geol & Geophys, New Haven, CT 06511 USA

[3] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 40期

关键词：

X-RAY-DIFFRACTION; PHASE-TRANSFORMATIONS; HYDROSTATIC LIMITS; PRESSURE; BEHAVIOR; FLUORINERT;

D O I：

10.1021/jp3075699

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：

Using high-resolution, synchrotron-based powder X-ray diffraction (XRD), we have studied the high-pressure behavior of the anatase phase of nanocrystalline TiO2 (nc-TiO2) under hydrostatic conditions. We find that for anatase with a grain size larger than similar to 40 nm, the room-pressure bulk modulus K-0 remains constant at similar to 200 GPa to within experimental uncertainties. An similar to 15% decrease in K-0 is observed for grains that are similar to 20 nm in size and remains unchanged for grains down to 6 nm in diameter, indicating a rapid increase in compressibility for nc-TiO2 anatase between 40 and 20 nm.

引用

页码：21635 / 21639

页数：5

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