Synthesis and Characterization of Transparent Glass-Ceramics in Na₂O-CaO-SiO₂ System

Abstract

Glass in Na2O-CaO-SiO2 was synthesized by conventional molten cooling method and then converted to glass-ceramics. Transparent glass-ceramics obtained by controlled crystallization process. DSC, SEM and XRD were used to determine the character temperature, microstructure and crystal type of the glass-ceramics, respectively. The results show the transition temperature of the matrix glass is 620°C and crystallization peak temperature is 730°C. Only Na2Ca2Si3O9 crystal phase was found in the glass-ceramics when the matrix glass was treated at 750°C for 1h. The crystal with size of 0.5um arranged regularly and formed a honeycomb-like structure in the glass-ceramics. UV-visible spectrum test indicate the transmittance of the glass-ceramic is as high as 75% in the visible region.

Densification of glass powder studied by master sintering curve and master kinetic curve methods

“…Powder technology and sintering enable the manufacturing of parts and products with complex shapes. [1][2][3][4][5] Sintering of glass powders is a common processing route for producing glass or glass-ceramic bodies with tailored properties. [6][7][8][9][10][11] Several attempts have been made to study the densification of glasses, and the kinetics of viscous flow sintering has been modeled for various conditions.…”

“…Powder technology and sintering enable the manufacturing of parts and products with complex shapes 1–5 . Sintering of glass powders is a common processing route for producing glass or glass‐ceramic bodies with tailored properties 6–11 .…”