Abstract:

Spherical calcium carbonate particles were prepared with sodium carboxymethyl cellulose (CMC) as crystalline control agent. Effects of different factors on the morphology and particle size were studied and  optimal synthesis conditions of spherical CaCO₃ were obtained. XRD, FTIR, SEM were used to characterize the product. The results indicate that the spherical particles  mainly consisted  of calcite mixed with a small part of vaterite, and the product has good sphericity and uniform particle size in a  range of about 1—3 μm.

Key words: crystalline control agent, sodium carboxymethyl cellulose (CMC), micron spherical particle CaCO₃, optimal condition