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Effect of K2O Addition on Crystallization and Microstructure of Li2O-ZnO-Al2O3-SiO2 System Glass-Ceramics

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Abstract:

The Li2O-ZnO-Al2O3-SiO2 system glasses with varying content of K2O were prepared. Crystallization processes of these glasses were investigated using X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Microstructure of the glass-ceramics was studied using scanning electron microscopy (SEM). The sequence of crystallization of Li2O-ZnO-Al2O3-SiO2 glasses can be divided into three stages such as crystallization of β1-Li2ZnSiO4, crystallization of Li2Al2Si3O10 and conversion of β1-Li2ZnSiO4 to γ0-Li2ZnSiO4. The K2O content doesn’t vary the crystallization sequence but enhances the crystallization of β1-Li2ZnSiO4. At the same time the introducing of K2O in Li2O-ZnO-Al2O3-SiO2 system hinders the crystallization of Li2Al2Si3O10 and the transformation of β1-Li2ZnSiO4 to the more stable phase γ0- Li2ZnSiO4.

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AICAM 2005 View Preview

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Periodical:

Advanced Materials Research (Volumes 11-12)

Pages:

205-208

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.11-12.205

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Online since:

February 2006

Authors:

Z.B. Ke, An Xian Lu, G.F. Huang

Keywords:

Crystallization, Glas Ceramics, Li2O-ZnO-Al2O3-SiO2 Glass

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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