Shock-consolidated TiO2 bulk with pure anatase phases fabricated by explosive compaction using underwater shockwave

被引：11

作者：

Kim, Youngkook ^{[2
]}

Mitsugi, Fumiaki ^{[1
]}

Tomoaki, Ikegami ^{[1
]}

Hokamoto, Kazuyuki ^{[2
]}

Itoh, Shigeru ^{[2
]}

机构：

[1] Kumamoto Univ, Grad Sch Sci & Technol, Kumamoto 8608555, Japan

[2] Kumamoto Univ, Shock Wave & Condensed Matter Res Ctr, Kumamoto 8608555, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2011年 / 31卷 / 06期

关键词：

Grain growth; Defects; TiO2; Residual stress; DYNAMIC CONSOLIDATION; NANOCRYSTALLINE TIO2; CERAMIC POWDERS; GRAIN-GROWTH; TRANSFORMATIONS; DENSIFICATION;

D O I：

10.1016/j.jeurceramsoc.2010.12.020

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Titanium dioxide (TiO2) bulk with pure anatase phases was fabricated by an explosive compaction technique using an underwater shockwave. Dynamic shock pressure of 6 GPa was used to consolidate anatase TiO2 powders. Its microstructural, crystalline structural and photocatalytic characteristics were observed and measured by various techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM) and photocatalytic activity measurement system. It was confirmed that the relative density of anatase TiO2 compact is about 96% (3.73 g/cm(3)) of the theoretical density (3.89 g/cm(3)) and a strong surface bonding between particles is formed by a shock energy. In X-ray diffraction analysis, high purity anatase phases, broadened peaks due to lattice defects and decreased crystallite size were found. For the photocatalytic activities, the anatase TiO2 compact was quite excellent compared to the commercial sintered TiO2 bulk. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：1033 / 1039

页数：7

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