Inorganic Chemicals Industry >
Preparation of porous spherical calcium carbonate with soluble starch as crystallization controller
Received date: 2020-08-17
Online published: 2021-05-12
Porous calcium carbonate microspheres with aragonite crystal form were prepared by simple double decomposition reaction,using calcium chloride and sodium carbonate as synthetic reagents and soluble starch(SS) as crystallization con-troller.Through the single-factor experiment,effects of the adding amount of soluble starch,the dropping speed of sodium carbonate solution,and the amount-of-substance ratio of calcium chloride to sodium carbonate on calcium carbonate morphology and crystal form were investigated.The crystal form and morphology were characterized by X-ray diffractometer(XRD) and scanning electron microscope(SEM).The results showed that when the adding amount of SS was 0.5 g,the dropping speed was 1.5 mL/min,and the amount-of-substance ratio of calcium chloride to sodium carbonate was 1∶1,porous vaterite calcium carbonate with partical size of 4~5 μm could be prepared.
Caixia Hu , Chenxin Hu , Jianlong Peng , Xing Zhong . Preparation of porous spherical calcium carbonate with soluble starch as crystallization controller[J]. Inorganic Chemicals Industry, 2021 , 53(5) : 51 -55 . DOI: 10.11962/1006-4990.2020-0374
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