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Effect of Forming Pressure and Sintering Temperature on Thermal Expansion Property of Li2O-Al2O3-P2O5-SiO2 Glass-Ceramics

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Abstract:

Li2O-Al2O3-P2O5-SiO2 xerogel powders were synthesized by sol-gel route and glass-ceramics were prepared under different forming pressure and sintering temperature. The effects of sintering temperature and forming pressure on coefficient of thermal expansion of prepared glass-ceramics were investigated by means of DTA-TG, TEC and XRD. The results indicate that xerogel powders crystallization begins at 785°C, and the main crystallite phases in the researched specimens are virgilite and cristobalite. The TEC decreases linearly with the forming pressure. When the sintering temperature is 950°C and forming pressure is 40MPa, a low TEC of 0.65×10-6 °C-1 can be obtained.

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Periodical:

Advanced Materials Research (Volumes 197-198)

Pages:

436-439

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.197-198.436

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Online since:

February 2011

Authors:

Min Hua Luo, Zhuo Hao Xiao

Keywords:

Glas Ceramics, Lithium Aluminosilicate, Sol-Gel Process, Virgilite

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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