以二氧化钛为对象 ,对水热条件下晶体同质变体的形成过程进行了研究 .根据实验结果和理论分析 ,可将水热条件下晶体同质变体的形成过程概括为一个“基元过程” ,它包括了生长基元的形成、生长基元之间的聚合反应导致晶核的形成、晶粒的生长等基本阶段 .环境相与生长条件对同质变体形成的作用主要体现于生长基元结构的不同 .例如 ,改变反应介质的酸碱度 ,水热反应体系中稳定能最高的生长基元的结构不同 ,这是不同水热条件下可以制得二氧化钛不同变体的原因 .生长基元在不同晶面族上的吸附、运动、结晶或脱附主要与晶相结构有关 .晶相内部缺陷的形成又与过程受到干扰有关 Based on the experimental results and theoretical analysis, the forming process of the homoplastic variants under hydrothermal conditions can be summarized as a “primitive process” It includes the formation of growth primitives, the polymerization between growth primitives leading to the formation of nuclei, the growth of grains and other basic stages.Environmental and growth conditions on the formation of homogeneous variants mainly reflected in the growth of the basic structure For example, changing the pH of the reaction medium, the structure of the growth units with the highest stable energy in the hydrothermal reaction system is different, which is why different variants of titanium dioxide can be prepared under different hydrothermal conditions. The adsorption, motility, crystallization or desorption on the surface is mainly related to the crystal structure. The formation of internal defects in the crystal phase is related to the process disturbances