| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 238622 | Powder Technology | 2009 | 6 Pages |
Calcium carbonate with various structures and morphologies were prepared by double injection of the CaCl2 and NH4HCO3 solutions with molar ratio of 1:1 at 30-80 °C. The lamellar vaterite particles, the mixture composed of vaterite, aragonite and calcite, and the aragonite whiskers were formed at 30-40 °C, 50-70 °C and 80 °C, respectively. Thermodynamic calculation showed that the value of [CO32−]/[Ca2+] decreased with the increase of temperature, which may be one of the reasons for the formation of the lamellar vaterite at 30-40 °C and the aragonite whiskers at 80 °C.
Graphical abstractLamellar vaterite aggregates and aragonite whiskers were synthesized via double injection of the CaCl2 and NH4HCO3 solutions at 30-40 °C and 80 °C, respectively. Thermodynamic calculation showed that the value of [CO32−]/[Ca2+] decreased with the increase of temperature, which may be one of the reasons for the formation of lamellar vaterite and aragonite whiskers at 30-40 °C and 80 °C respectively.Figure optionsDownload full-size imageDownload as PowerPoint slide
