Raman spectroscopy and phase transition of anatase TiO2 under high pressure

被引：149

作者：

Sekiya, T ^{[1
]}

Ohta, S ^{[1
]}

Kamei, S ^{[1
]}

Hanakawa, M ^{[1
]}

Kurita, S ^{[1
]}

机构：

[1] Yokohama Natl Univ, Fac Engn, Dept Phys, Yokohama, Kanagawa 2408501, Japan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2001年 / 62卷 / 04期

关键词：

high pressure; Raman spectroscopy; phase transitions;

D O I：

10.1016/S0022-3697(00)00229-8

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The behavior of anatase TiO2 single crystal under hydrostatic high pressure of up to 6.7 GPa has been investigated using a diamond anvil cell at room temperature by Raman spectroscopy. A pressure-induced and irreversible phase transition occurs in the pressure range from 4.3 to 4.6 GPa. The pressure dependence of the Raman active modes of anatase was measured. The decrease in nu (5) band-frequency from 197 cm(-1) was observed. Some single crystals of anatase were transformed to the high-pressure phase while retaining its transparency and hardness. A mechanism for the transition of anatase to the high-pressure phase is proposed on the basis of structural chemistry. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：717 / 721

页数：5

共 17 条

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