Formation of Calcium Carbonate Superstructures by Rapid Temperature Change

Authors

  • H. Nebel,

    1. Duisburg-Essen, Institute of Inorganic Chemistry and Center for Nanointegration of the University
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  • M. Epple Prof. Dr.

    Corresponding author
    1. Duisburg-Essen, Institute of Inorganic Chemistry and Center for Nanointegration of the University
    • Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitaetsstrasse 5–7, D-45117 Essen, Fax: (+49) 201 183-2621
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  • Dedicated to Professor B. Krebs on the Occasion of his 70th Birthday

Abstract

Calcium carbonate was crystallized in a tubular reactor with crystallization times of the order of seconds from aqueous solutions of calcium chloride and sodium carbonate without additives. By a rapid temperature change during this time, both the morphology and the phase composition (calcite, aragonite, vaterite) changed dramatically. Superstructures consisting of smaller nanoparticles and recrystallization phenomena that otherwise require the presence of additives were formed.

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