Influence of stirring speed on the crystallization of calcium carbonate

Authors

  • Feng-Wen Yan,

    1. Beijing National Laboratory for Molecular Sciences (BNLMS), Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
    2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, P. R. China
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  • Shu-Feng Zhang,

    1. Beijing National Laboratory for Molecular Sciences (BNLMS), Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
    2. College of Chemistry and Life Science, Tianjin Normal University, Tianjin 300074, P. R. China
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  • Cun-Yue Guo,

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  • Xiao-Hui Zhang,

    1. Beijing National Laboratory for Molecular Sciences (BNLMS), Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
    2. Graduate University of the Chinese Academy of Sciences, Beijing 100049, P. R. China
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  • Guo-Chang Chen,

    1. Beijing National Laboratory for Molecular Sciences (BNLMS), Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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  • Fang Yan,

    1. Beijing National Laboratory for Molecular Sciences (BNLMS), Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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  • Guo-Qing Yuan

    1. Beijing National Laboratory for Molecular Sciences (BNLMS), Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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Abstract

Control over crystal morphology of calcium carbonate (CaCO3) was investigated by simply changing the stirring speeds in the process of CaCO3 formation. Scanning electron microscopy (SEM) and powder X-ray diffraction (XRD) measurements explore the morphology evolution of CaCO3 at varying stirring speeds. As the stirring speeds increase, rhombohedral calcite, spherical vaterite, and monoclinic crystal with coexistence of calcite phase and vaterite phase were formed, suggesting a facile control over calcium carbonate crystallization in constructing crystals with desired morphology. Moreover, almost pure vaterite spherical particles of narrow particle size distribution were formed at optimum stirring speed. Finally, also elucidated in this work is the mechanism investigation into the construction of various crystal forms via this simple route. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

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