晶体成核新进展:经典与非经典成核在同一体系共存

Progress on Studies of Crystal Nucleation:Coexistence of Classical and Non-Classical Nucleation in Common System

结晶是材料生产和加工过程中非常重要的一步,也是自然环境中矿物生成的重要步骤。结晶演化过程中,最基本和最重要的步骤是成核。本文综述了近年来具有代表性的非经典成核路径,包括:旋节线分解、预成核团簇以及无定形前驱体等,论述了多种成核路径在同一体系共存的证据,探讨了将非经典成核纳入经典成核的理论体系建设,并展望了晶体成核未来的研究方向。本文为晶体成核提供了一个新视角——经典与非经典成核在同一体系共存,有助于对晶体成核理论提供更深入的认识。

Crystallization is an important stage in the synthesis of materials and in the formation of minerals in natural environment.This review represented some typical non-classical nucleation pathways proposed in recent years,i.e.,spinodal decomposition,pre-nucleation clusters,and amorphous precursors.The multiple nucleation pathways coexisting in the same system were discussed.The theoretical system construction of incorporating non-classical nucleation into classical nucleation theoretical framework was analyzed.In addition,the future research aspects of crystal nucleation were also prospected.This review provides a perspective aspect on crystal nucleation-classical and non-classical nucleation coexisting in a common system,which is promising to further clarify the theory of crystal nucleation.