Nanosize Beta-Spodumene Glass-Ceramic Powders Synthesized by Sol–Gel Route

Abstract:

Beta-spodumene glass-ceramic powder was prepared by Sol–gel route. Tetraethyl orthosilicate (TOES), aluminum nitrate, lithium carbonate were used as starting materials. X-ray powder diffraction (XRD), thermal expansion coefficient (TEC), scanning electron microscope (SEM) and transmission electron microscope (TEM) were utilized to characterize the dried LAS gels and glass-ceramic blocks. The results suggest beta-spodumene is the only crystals phase in the prepared LAS glass-ceramics powder when sintering temperature is 950 °C. The average particle size of the beta-spodumene crystal is about 30 nm with a narrow size distribution both in prepared LAS glass-ceramics powder and block. The thermal expansion coefficient of moulding pressed blocky LAS glass-ceramics is lower than 0.6×10^{-6 o}C^-1.

• Periodical: Applied Mechanics and Materials (Volumes 110-116)
• Pages: 3844-3848
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.110-116.3844
• Online since: October 2011
• Authors: Zhuo Hao Xiao, Wen Yan Luo
• Keywords: Component, Glas Ceramics, LAS, Powder, Sol-Gel Process, Thermal Expansion Property

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