Crystallization kinetics and dielectric properties of barium strontium titanate based glass-ceramics

被引：40

作者：

Chen, Jichun ^{[1
]}

Zhang, Yong ^{[2
]}

Deng, Changsheng ^{[2
]}

Dai, Xiaming ^{[2
]}

机构：

[1] Chinese Acad Sci, Shenyang Res & Dev Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China

[2] Tsinghua Univ, Beijing Fine Ceram Lab, State Key Lab New Ceram & Fine Proc, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 121卷 / 1-2期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Glasses; Crystallization; Differential scanning calorimetry (DSC); Dielectric properties; Microstructure; PHASE-CHANGE; BEHAVIOR; MICROSTRUCTURE; LIQUIDS;

D O I：

10.1016/j.matchemphys.2010.01.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystallization kinetics in the glass system BaxSr(1-x)TiO(3)-Al2O3-SiO2 prepared via the conventional melt-quenching technique has been studied by isothermal method using differential scanning calorimetry (DSC). X-ray powder diffraction studies carried out on heat-treated (850-1100 degrees C) glasses reveal the evolution of BaxSr(1-x)TiO(3) crystalline phase along with a second phase of BaAl2Si2O8. The exponent n in the Johnson-Mehl-Avrami (JMA) equation applied to the isothermal process is in the range of 2.3-2.73. The apparent activation energy for BaxSr1-xTiO3 crystal growth obtained from JMA equation under isothermal condition is 457 kJ mol(-1), which is close to the dissociation energy of Si-O bonds. Moreover, there is no remarkably different effect between one-stage and two-stage heat treatment procedures on the microstructures and dielectric properties of barium strontium titanate based glass-ceramics in the present study, according to structure-property analysis. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：109 / 113

页数：5

共 27 条

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