Nanosize Beta-Spodumene Glass-Ceramic Powders Synthesized by Sol–Gel Route
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 oC-1.
Z. H. Xiao and W. Y. Luo, "Nanosize Beta-Spodumene Glass-Ceramic Powders Synthesized by Sol–Gel Route", Applied Mechanics and Materials, Vols. 110-116, pp. 3844-3848, 2012