Phase separation in sol-gel derived ZrO2-SiO2 nanostructured materials

被引：24

作者：

Gaudon, A ^{[1
]}

Dauger, A ^{[1
]}

Lecomte, A ^{[1
]}

Soulestin, B ^{[1
]}

Guinebretière, R ^{[1
]}

机构：

[1] ENSCI, CNRS, UMR 6638, F-87065 Limoges, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2005年 / 25卷 / 2-3期

关键词：

phase separation; X-ray diffraction; crystallization;

D O I：

10.1016/j.jeurceramsoc.2004.08.010

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：

Textures formed by phase separation and crystallization of sol-gel derived ZrO2-SiO2 materials with 30 mol% ZrO2, were examined by X-ray diffraction, small angle X-ray scattering and transmission electron microscopy. An amorphous phase separation consisting in silica-rich and zirconia-rich interconnected domains was shown to be present before crystallization. In the initial stage crystallization of metastable tetragonal zirconia, nucleation was considered to occur in the ZrO2-rich regions. The size and spatial distribution of crystalline particles, dispersed in the amorphous SiO2-rich matrix, are controlled by the phase separation texture. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：283 / 286

页数：4

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