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The Effects of CaF2 in Mica Glass-Ceramics

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Abstract:

Different concentrations of CaF2 were incorporated in mica glass-ceramics to evaluate their effects on the crystallization and microstructure. The kinetics of phase transformations, and the microstructures of the final crystalline phase were found to be dependent on the concentration of nucleation agents. The results showed that CaF2 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 CaF2 were changed in the range of 419-747 kJ/mol.

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Diffusion in Solids and Liquids VIII View Preview

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Periodical:

Defect and Diffusion Forum (Volumes 334-335)

Pages:

258-263

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.334-335.258

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Online since:

February 2013

Authors:

M. Ghasemzadeh, Ali Nemati

Keywords:

Crystallization Kinetics, Glass Ceramics, Machinability, Phlogopite

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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