Sol-gel preparation and characterization of nano-crystalline-lithium mica glass-ceramic

被引：18

作者：

Tohidifar, M. R. ^{[1
]}

Alizadeh, P. ^{[1
]}

Riello, P. ^{[2
]}

Eftekhari-yekta, B. ^{[3
]}

Aghaei, A. R. ^{[4
]}

机构：

[1] Tarbiat Modares Univ, Dept Mat Sci & Engn, Tehran, Iran

[2] Univ Ca Foscari, Dept Mol Sci & Nanosyst, Venice, Italy

[3] Iran Univ Sci & Technol, Dept Mat Engn, Tehran, Iran

[4] Mat & Energy Res Ctr, Div Ceram, Tehran, Iran

来源：

CERAMICS INTERNATIONAL | 2012年 / 38卷 / 04期

关键词：

Sol gel processes; Calcination; Electron microscopy; Glass ceramics; IONIC-CONDUCTIVITY; POWDERS;

D O I：

10.1016/j.ceramint.2011.11.052

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：

The nano-crystalline lithium mica glass ceramic with separated crystallite size of 13 nm was prepared using sol gel technique. In such a process, the structural evolutions and microstructural characteristics of the synthesized samples were investigated through X-ray diffraction, transmission electron microscopy, thermal analysis and Fourier transform infrared spectroscopy. It was found that the crystallite size of the mica obtained from sol gel method is smaller than the one synthesized via conventional melted method. The XRD results also showed that the crystallization of mica occurred above 675 degrees C and it could originate from MgF2 so that the next stage will also be the transformation from mica to norbergite and norbergite to chondrodite. The activation energy of the crystallization and Avrami factor were measured as 376.7 kJ mol(-1) and 2.3, respectively. It is found that the bulk crystallization could be considered as the predominant crystallization mechanism for the glass-ceramic. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：2813 / 2821

页数：9

共 27 条

[1] Preparation and characterization of silver nanoparticles within silicate glass ceramics via modification of ion exchange process [J].