The crystallization properties of multicomponent glass based on the Li2O–Al2O3–SiO2 system are investigated.
By the Marotta et al method, temperature of 670 ?C at a holding time of 2 hours provides the maximum rate of nucleation the crystalline phase of ?-eucryptite-like solid solutions was found. The activation energy of nucleation and the Avrami parameter were measured by the DSC method, allowing to estimate the crystallization characteristics. The gradient crystallization method has established the temperature range of heat treatment, within which it is possible to obtain a transparent glass-ceramic. The refinement of regime the nucleation stage made it possible to reduce the time of the second stage crystallization required for the complete formation of the transparent glass-ceramic structure. Varying the holding time at a temperature of 710 ?C makes it possible to smoothly change the CTE in the range of ?(3…+41)?10–7 K?1 in the temperature range from ?120 to +500 ?C.
Andrey S. Naumov – PhD Student of the Department of Chemical Technology of Glass and Glass-Ceramics of the Mendeleev University of Chemical Technology of Russia (Mendeleev University), Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Roman O. Alekseev – lead engineer, Department of Chemical Technology of Glass and Glass-Ceramics, Mendeleev University of Chemical Technology of Russia (MUCTR), Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Vitaliy I. Savinkov – Ph.D. in Technology, Assistant of the of the Department of Chemical Technology of Glass and Glass-Ceramics of the Mendeleev University of Chemical Technology of Russia (Mendeleev University), Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Vladimir N. Sigaev – DSc. in Chemistry, Professor, Head of the International Center of Laser Technologies, Head of the P.D. Sarkisov International Laboratory of Functional Glass-based Materials, Head of the Department of Chemical Technology of Glass and Glass-Ceramics of the Mendeleev University of Chemical Technology of Russia (Mendeleev University), Moscow, Russia. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
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