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

作者：Altay E; Shahwan T^*; Tanoglu M

来源：Powder Technology, 2007, 178(3): 194-202.

DOI：10.1016/j.powtec.2007.05.004

• calcite
• aragonite
• morphology

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 degrees C, 50 degrees C, 70 degrees C, and 90 degrees 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.

• 出版日期2007-9-25