Open AccessStructural and dynamic properties of lithium silicate liquid: A view from molecular dynamics simulation
Author(s) -
Truong Đuc Quynh,
Tran Thanh Dung,
Mai Văn Dũng,
Nguyen Van Yen
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1854/1/012010
Subject(s) - molecular dynamics , lithium (medication) , coordination number , silicate , atom (system on chip) , chemical physics , materials science , diffusion , radial distribution function , bond length , thermodynamics , chemistry , crystallography , computational chemistry , ion , crystal structure , physics , organic chemistry , medicine , computer science , embedded system , endocrinology
In this work, we have investigated the liquid lithium silicate by the method of molecular dynamics simulation (MD) using the Born-Mayer pairwise potentials under compression. The simulations have been carried out by systems including various pressure values from 5 to 30 GPa. The microstructure of lithium silicate was clarified through the thorough analysis of short-range order (SRO) and intermediate range order (IRO). The short-range order was investigated through factors such as pair radial distribution functions (PRDFs), coordination distributions, angular distributions. The results show that the structure of the system has a transformation from low-coordination to high-coordination under the influence of compression. Besides, the analysis of intermediate range order shows that the structure network in model consists of SiOx and LiOx units connected to others via an Oxygen atom. In the case for the intermediate range order, the fraction of OTy bond calculated under compression shows that their bonding angle and bond length are very little dependent on the pressure changes. Furthermore, the dynamics of liquid lithium silicates calculated through the diffusion coefficients of the atoms shows that there is a dependence of atomic mobility on pressure. The obtained results of simulations are in good agreement with previous experimental and simulated data.