Abstract
This research was aimed to synthesize calcium carbonate nanoparticles from CaCl2, NaCl and Na2CO3 precursors by mechano-chemical route without any subsequent heat treatment of the as-milled powder. Effects of intensive milling duration and amount of NaCl as a diluting agent on the powder particle characteristics have been investigated. XRD results showed that CaCO3 nanoparticles were obtained after 30 minutes of continuous milling in the planetary ball mill regardless of the amount of NaCl. Further milling up to 10 hour resulted in peak broadening indicating the crystallite refinement. For the 10-hour milled sample in the presence of 3.5 mole% NaCl, the mean crystallite and particle sizes were 12 and 56 nm, respectively. Those values decreased slightly when the amount of NaCl increased from 3.5 to 10.3 mole%.
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