Crystallization kinetics and phase development of PbO-BaO-SrO-Nb2O5-B2O3-SiO2-based glass-ceramics

被引:50
作者
Cheng, CT
Lanagan, M [1 ]
Jones, B
Lin, JT
Pan, MJ
机构
[1] Penn State Univ, Ctr Dielect Studies, Mat Res Inst, University Pk, PA 16802 USA
[2] Ind Technol Res Inst, Mat Res Labs, Hsinchu 31040, Taiwan
[3] Nova Res Inc, Alexandria, VA 22308 USA
关键词
D O I
10.1111/j.1551-2916.2005.00551.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
The nucleation and crystallization kinetics of PbO-BaO-SrO-Nb2O5-B2O3-SiO2-based glass-ceramics have been investigated. Strontium barium niobate (Sr0.33Ba0.67Nb2O6) with a tetragonal tungsten-bronze structure formed as the major crystalline phase, which nucleates and grows on the surface region of samples. The results of the present study showed an apparent activation energy of 193 kJ/mol for nucleation, which was controlled by the viscous flow of the glass. Quantitative X-ray analysis and differential thermal analysis showed that the rate-limiting mechanism of crystallization appeared to be a three-dimensional interfacial growth, which has an apparent activation energy of 386-430 kJ/mol, a value that is close to the dissociation of Si-O bonds in the glass system.
引用
收藏
页码:3037 / 3042
页数:6
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