Journal
POWDER TECHNOLOGY
Volume 205, Issue 1-3, Pages 270-275Publisher
ELSEVIER
DOI: 10.1016/j.powtec.2010.09.032
Keywords
Micro-CaCO3; Oriented additives; Synergic effect; Ripening mechanism
Categories
Funding
- National Natural Science Foundation of China [20803040, 20771075]
- Chinese 973 Project [2010CB933901]
- 863 Key Project [2007AA022004]
- New Century Excellent Talent of Ministry of Education of China [NCET-08-0350]
- Special Key Project of China [2009ZX10004-311]
- Shanghai Science and Technology Fund [10XD1406100]
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A facile solution precipitation route (between Ca2+ and CO32-) for the gram-scale synthesis of uniform micro-CaCO3 from cubes, to spheres, to ellipses, to oblates, and to rods via control of the type and amount of oriented additives (dodecyl sodium sulfate, cetyltrimethylammonium bromide, Ba2+ and Co2+) has been demonstrated. The products were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). In the presence of Ba2+, dispersed micro-CaCO3 spheres (average diameter is 2391.1 nm, the majority particles are distributed in the range of 1574.1 to 4068.2 nm) could be vastly obtained in a highly morphological yield (similar to 100%). The formation process of these microstructures was clarified as the synergic effect of oriented arrangement and ripening mechanism with face-selective additives adsorption on the growing CaCO3 particles. (C) 2010 Elsevier B.V. All rights reserved.
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