Role of MgF2 on properties of glass-ceramics

被引：10
|
作者：
Ghasemzadeh, M. [1 ]
Nemati, A. [2 ]
机构：
[1] Islamic Azad Univ, Karaj Branch, Dept Mat Engn, Karaj, Iran
[2] Sharif Univ Technol, Sch Mat Sci & Engn, Tehran, Iran
来源：
BULLETIN OF MATERIALS SCIENCE | 2012年 / 35卷 / 05期
关键词：
Crystallization kinetics; glass ceramics; machinability; phlogopite; DIFFERENTIAL THERMAL-ANALYSIS; CRYSTALLIZATION; MACHINABILITY; NUCLEATION; KINETICS; SYSTEM;
D O I：
10.1007/s12034-012-0379-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Formation of machinable glass-ceramic in the system MgO-SiO2-Al2O3-K2O-B2O3-F with and without addition of MgF2 has been investigated. Crystallization of glass sample was done by controlled thermal heat treatment at nucleation and crystallization temperatures. The results showed that MgF2 in high concentration had a synergistic effect and enhanced the formation of interlocked mica crystals. Non-isothermal DTA experiments showed that the crystallization activation energies of base glasses were changed in the range of 235-405 kJ/mol, while the crystallization activation energies of samples with addition of MgF2 were changed in the range of 548-752 kJ/mol.
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页码：853 / 858
页数：6
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