Abstract
The composite materials consisting of crystals and glasses were prepared by heat-treating the mixtures of Li2O-SiO2 (LS) and Na2O-CaO-SiO2 (NCS) glass powders. In the specimens in which the proportion of Li2O-SiO2 glass is high, the main crystalline phase was Li2O⋅2SiO2, and as the Li2O-SiO2 glass content decreases, other crystals such as α-quartz, β-cristobalite, and wollastonite were detected. The differential thermal analysis, thermal expansion coefficient, softening temperature, apparent density, porosity, compressive strength and bending strength were measured. The relations between the strengths and the mixing ratio of LS and NCS glass were analyzed based on the crystal content and the porosity. The crystallization behavior and the composite reaction process were also discussed.
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