Fabrication and XRD Study of Lithium Silicate by Solid-State Reaction

Abstract

At present, solid-state reaction, precipitation method and sol-gel method are applied to fabricate lithium silicate. Solid-state reaction has the advantage of short reaction time, simple process and less impurity phase in comparison with other method. So in this paper fabrication of lithium silicate by solid-state reaction was investigated systematically. Thermogravimetric analysis, differential scanning calorimetry and XRD analysis were carried out systematically in this paper. The reaction process and mechanism at different temperatures and the effects of the reaction temperature, Li:Si molar ratio and heat preservation time on the lithium silicate phase were discussed. Experimental results showed that the mixture were sintered at 900°C for 2h, there would have relatively high content of lithium silicate phase. And reunion is not serious that is benefit of grinding. While the Li:Si molar ratio was 4:1, there would have relatively high content of lithium silicate phase. While the Li:Si molar ratio was 5:1, the lithium silicate phase was severely agglomerated.