Crystallization and characterization of some cabal glasses containing $Li_2O$ as nucleating agent

Abstract

The behavior of cabal glasses, based on the $CaO-B_2O_3-Al_2O_3$ compositions towards crystallization, their chemical durability and thermal expansion coefficients as well as derivative glass ceramics have been investigated. The base glass composition was modified by replacing part of CaO by $Li_2O$ to initiate crystallization. The glass ceramics were found to have higher chemical durability and lower thermal expansion coefficients than the precursor glass, that can be correlated with the formation of $Li_2B_8O_13(Li_2O.4B_2O_3)$, $beta-CaAl_2B_2O_7$ and $LiAlO_2$.