Morphosynthesis of CaCO3 at different reaction temperatures and the effects of PDDA, CTAB, and EDTA on the particle morphology and polymorph stability

E. Altay, T. Shahwan, M. Tanoǧlu

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56 Scopus citations

Abstract

Facile precipitation of CaCO3 was performed using aqueous solutions of CaCl2 with Na2CO3 over a wide range of mixing and aging temperatures. The precipitation process was then repeated in the presence of PDDA, CTAB, and EDTA at the mixing temperatures of 30 °C, 50 °C, 70 °C, and 90 °C. The presence of these additives was seen to greatly suppress the formation of aragonite. Among these additives, EDTA was the one that showed the most prominent effects on particle morphology of CaCO3. The sequence of pH adjustment appeared to be a critical factor for the additive functionality.

Original languageEnglish (US)
Pages (from-to)194-202
Number of pages9
JournalPowder Technology
Volume178
Issue number3
DOIs
StatePublished - Sep 25 2007

Bibliographical note

Funding Information:
The authors acknowledge TUBITAK for its financial support (Project No. 104T089). The authors would like to thank the Center of Material Research/Izmir Institute of Technology for the assistance in the SEM and XRPD measurements.

Keywords

  • Aragonite
  • Calcite
  • Morphology

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