自扩散系数：衡量相变材料扩散性能的关键参数

Thank you very much for your suggestion. The self-diffusion coefficient is an important parameter for measuring the diffusion capability of a substance and can be used to evaluate the migration rate of ions or molecules in the solid state. In phase-change materials, the changes in self-diffusion coefficient can reflect the migration and rearrangement of ions or molecules during the phase transition process. By measuring and comparing the self-diffusion coefficients under different conditions, one can understand the diffusion performance, thermodynamic and kinetic properties of phase-change materials, as well as the behavior of ions or molecules during phase transitions. Therefore, using the self-diffusion coefficient as a criterion can provide quantitative information about the diffusion behavior of phase-change materials.