Title :
Preparation of aragonite by carbonation process
Author :
Qingfeng, Liu ; Wenyu, Shang ; Bin, Liu ; Wei, Chen ; Chen Shoutian
Author_Institution :
State Key Lab. of Electr. Insulation for Power Equip., Xi´´an Jiaotong Univ., China
Abstract :
Aragonite calcium carbonate was synthesized by carbonation process, and MgCl2 was selected as inhibitor of calcite phase. The effects of concentration of MgCl2, pH value of initial suspension, reaction temperature and stirring rate on calcium carbonate polymorphs were investigated. The result indicated that the aragonite phase can be formed at the condition of pH~9, above 60°C and suitable concentration. The crystal has high aspect ratios ranging from 10 to 40, and can be modified by changing the conditions of reaction
Keywords :
calcium compounds; crystal growth from solution; polymorphism; whiskers (crystal); 60 C; CaCO3; MgCl2 suspension; aragonite phase; aspect ratio; calcium carbonate polymorph; carbonation reaction; crystal growth; inhibitor; pH; stirring; whisker; Calcium; Crystalline materials; Dielectrics and electrical insulation; Inhibitors; Organic materials; Polymers; Power generation economics; Rubber; Scanning electron microscopy; Temperature;
Conference_Titel :
Electrical Insulating Materials, 1998. Proceedings of 1998 International Symposium on
Conference_Location :
Toyohashi
Print_ISBN :
4-88686-050-8
DOI :
10.1109/ISEIM.1998.741710
