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Role of MgF2 on properties of glass-ceramics

Ghasemzadeh, M ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1007/s12034-012-0379-2
  3. Publisher: Springer , 2012
  4. Abstract:
  5. Formation of machinable glass-ceramic in the system MgO-SiO 2-Al2O3-K2O-B2O 3-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 interlockedmica 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
  6. Keywords:
  7. Crystallization activation energy ; Crystallization temperature ; Glass samples ; High concentration ; Nonisothermal ; Phlogopite ; Synergistic effect ; Activation energy ; Crystallization kinetics ; Machinability ; Mica ; Glass ceramics
  8. Source: Bulletin of Materials Science ; Volume 35, Issue 5 , October , 2012 , Pages 853-858 ; 02504707 (ISSN)
  9. URL: http://link.springer.com/article/10.1007%2Fs12034-012-0379-2