液相法控制合成文石和方解石(英文)

Control synthesis of aragonite and calcite in aqueous solution

用简便的水热法制备出菱形、针状和树状的碳酸钙晶体,不需任何添加剂,也不需要对pH值进行控制。用XRD、SEM、FT-IR和TGA-DTA技术对产物的形貌、结构特征和热力学稳定性进行了表征。对实验条件的系统研究发现,通过控制反应物的浓度,即可简便地获得多种晶型和形貌的碳酸钙。

CaCO3 polymorphs with rhombohedra, needle-, tree-like morphologies have been synthesized by a convenient hydrothermal reaction with the absence of additives or elaborating pH control. XRD, SEM, FT-IR and TGA-DTA techniques were used to characterize the structural features and thermal behavior of the experimental products. The experimental conditions were explored systematically and it was found that polymorphs with manifold morphologies of CaCO3 could be conveniently synthesized by controlling the concentration of reactants.