Conversion of SiO2 diatom frustules to BaTiO3 and SrTiO3

被引：27

作者：

Dudley, Shannon ^{[1
]}

Kalem, Tugba ^{[1
]}

Akinc, Mufit ^{[1
]}

机构：

[1] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2006年 / 89卷 / 08期

关键词：

D O I：

10.1111/j.1551-2916.2006.01091.x

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：

Diatom frustules were used as bio-templates to synthesize functional ceramics via solid-gas displacement reactions. Silica-based frustules were exposed to TiF4 at 330 degrees C to form TiOF2, which was later converted to TiO2 (anatase) by heat treatment in air at 600 degrees C. The TiO2 frustules were then exposed to molten Ba(OH)(2) or Sr(OH)(2) to form BaTiO3 or SrTiO3, respectively. In both cases, near-complete conversion was achieved while retaining the morphology of the original silica frustules. BaTiO3 and SrTiO3 frustules exhibit nearly phase pure, nanocrystalline perovskite structure.

引用

页码：2434 / 2439

页数：6

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