Polymorphic Changes of calcite Carbonate Sediment in Aqueous Solution

摘要

Calcium carbonate (CaCO_3) is abundant in nature, and is also an important material applied in industry as pigment, filler material, etc. It is a challenge to control the desired CaCO_3 properties for industry applications. In this study, three typical morphologies of CaCO_3, calcite, aragonite and vaterite were prepared. The crystallization temperature and addition of acrylicacrylate-sulfosalt copolymer play a significant effect on the polymorph change of CaCO_3 sediment. Higher temperature promoted the formation of aragonite, while more additives tended to form the vaterite. The x-ray diffraction and scanning electron microscope analysis confirmed the formation of CaCO_3 with various polymorphs.