利用耦合FACTSage Toxide热力学数据库的定量相场模型,本研究模拟了硅灰石(CaSiO_3)在CaO-Al_2O_3-SiO_2体系中的恒温晶体生长过程,并研究了熔体组分和温度对CaSiO_3结晶过程的影响。结果表明,硅灰石的形貌主要由其表面能的各向异性所决定,而几乎不受界面动力学的各向异性所影响。此外,随着温度的降低,析出的硅灰石的生长方式由平面生长向枝晶生长方式转变,于此同时,更加精细的枝晶结构也逐渐呈现出来。模拟所得的枝晶生长速度和尖端半径与Ivanstov理论所得结果一致,和实验测得的数据也处于同一数量级。 The quantitative phase field model coupled with FACTSage Toxide thermodynamic database was used to simulate the isothermal growth of wollastonite (CaSiO_3) in CaO-Al_2O_3-SiO_2 system. The effects of melt composition and temperature on the crystallization process of CaSiO_3 influences. The results show that the morphology of wollastonite is mainly determined by the anisotropy of its surface energy and is hardly affected by the anisotropy of interface kinetics. In addition, as the temperature decreases, the growth mode of precipitated wollastonite changes from planar growth to dendritic growth mode, at the same time, the finer dendritic structure gradually emerges. The simulated dendrite growth rate and tip radius are consistent with the results obtained from Ivanstov theory and are in the same order of magnitude as the experimentally measured data.