Abstract
Calcium carbonate particles with different morphologies were prepared by the reaction of sodium carbonate with calcium chloride in the presence of different organic additives at 25°C and 80°C. The as-prepared products were characterized with scanning electron microscopy and X-ray diffraction. The results showed that both organic additives and temperature turned out to be important parameters for the control of morphologies of CaCO 3. Various crystal morphologies of CaCO 3, such as, plate, rhombohedra, ellipsoids, whisker, dendrite, etc. can be obtained depending on the experimental conditions. In particular, monodispersed rhombohedral calcite particles, whiskers of aragonite and exquisite dendrite-shaped CaCO 3 aggregates were obtained with polyacrylic acid, cetyltrimethylammonium bromide and polyvinyl alcohol as additives at 80°C, respectively.
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