Author(s)

Wakana Nagaki¹, Norihito Doki^1*, Masaaki Yokota¹, Kazuo Yamashita², Toshiji Kojima², Toshiyuki Tanaka²

¹Department of Chemistry and Bioengineering, Faculty of Engineering, Iwate University, Morioka, Japan.
²OKUTAMA KOGYO CO., LTD., Tokyo, Japan.

Calcium carbonate, the main component of lime, has been widely used in industry due to its stability and economy. Calcium carbonate has three types of crystalline polymorphism, calcite, aragonite and vaterite, each with different properties. Therefore, the control of crystal polymorphism is required for industrial applications. In addition, the control of crystal size and shape is similarly required for different applications. In this study, the effect of SrCO₃ on the size control of fine aragonite-type calcium carbonate crystals by uniform urea precipitation and the effect of SrCO₃ addition was investigated by adding solid strontium carbonate and dissolved strontium carbonate. The addition of solid strontium carbonate affected the crystal polymorphism and size of the calcium carbonate produced, depending on the properties of the solid particles and the amount of SrCO₃ added. Experiments on the addition of dissolved SrCO₃ showed that the supersaturation formation rate could be controlled to control the crystal polymorphism.

CaCO₃, Aragonite, SrCO₃, Crystal Polymorphism, Size Control

Nagaki, W. , Doki, N. , Yokota, M. , Yamashita, K. , Kojima, T. and Tanaka, T. (2021) Control of Crystal Size and Morphology of Calcium Carbonate Crystal Polymorphism. Journal of Materials Science and Chemical Engineering, 9, 38-45. doi: 10.4236/msce.2021.94005.