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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.117  No.1363 (March) (2009)  >  pp.407-410

Journal of the Ceramic Society of Japan
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Properties of Li2O-ZnO-Al2O3-SiO2 glass-ceramic system prepared by spray pyrolysis

Jin Man HAN1), Dae Soo JUNG1), Jang HEUI1) and Yun Chan KANG1)
1) Department of Chemical Engineering, Konkuk University

  Li2O-ZnO-Al2O3-SiO2 (LZAS) glass-ceramic system was studied in the high temperature spray pyrolysis. Small amount of P2O5 was used as nucleation agent. Fine-sized Li2O-ZnO-Al2O3-SiO2 glass powders with amorphous phase and spherical shape were formed by spray pyrolysis at temperatures between 1300 and 1500°C. The mean size of the glass powders prepared at a temperature of 1500°C was 0.7 μm. The glass transition temperature (Tg) of the glass powders was 551.2°C. The two crystallization exothermic peaks were observed at 703.8 and 923.8°C. Densifications of specimens occurred at sintering temperatures of 800 and 900°C, in which interconnected network microstructure was formed by tiny dendritic crystals. The specimens sintered at temperatures of 600 and 700°C had LiAl(SiO3)2 crystal structure. On the other hand, the specimens sintered at temperatures between 800 and 1000°C had LiAlSi2O6 (β-spodumene) crystal structure.

Glass-ceramic, Spray pyrolysis, Sealant, Glass powder

Received: September 02, 2008
Accepted: November 20, 2008 , Published online: March 01, 2009
Copyright (c) 2009 The Ceramic Society of Japan



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