Surface Morphology and Molecular Bonding of CaCO_3 Nanocrystallites by Gas Diffusion Method

摘要

Calcium carbonate with the chemical formula of (CaCO_3) is the most abundant element in the world. Its usage on certain applications is largely affected by its properties. The best means to control its properties is through controlled preparation of CaCO_3. This study uses diffusion method between the precursors Calcium Chloride and Ammonium Carbonate. Instead of using water, ethanol was used to prepare the salt. Reaction was done in room temperature (RT) for 6h-24h. Smallest average crystallite size measured by FESEM micrograph is 500nm produced by synthesis of CaCO_3 reacted for 168 hours. From energy-dispersive X-ray spectrum also indicated the smallest particle size is by CaCO_3 reacted for 168 hours. Changes was seen for element Ca at 3.7keV.