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The lithium silicate (Li2O)0.1.(SiO2)0.9 has been investigated by molecular dynamics simulation.The models are prepared at temperature from 1500 K to 4000 K and at ambient pressure.The microstructure of the considered models is analyzed through partial distribution functions, coordination number, bond-length, and bond-angle statistics.The results show a significant difference in the SiO4, SiO5, and SiO6 units between the pure silica and lithium silicate.The diffusion in both liquid just mentioned is determined discussed here.