| 两种重要形貌的碳酸钙的可控合成及生长机理探讨 |
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| 引用本文： | 马俊,刘华彦,梁锦,陈银飞. 两种重要形貌的碳酸钙的可控合成及生长机理探讨[J]. 材料科学与工程学报, 2011, 0(2): 227-232 |
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| 作者姓名： | 马俊 刘华彦 梁锦 陈银飞 |
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| 作者单位： | 浙江工业大学化学工程与材料学院绿色化学合成国家重点实验室培育基地; |
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| 摘 要： | 本文采用碳化法,在改进了气体分布器的自制鼓泡搅拌釜中,以MgCl2和ZnSO4为晶型控制剂制备了不同形貌的碳酸钙。主要讨论了晶型控制剂、碳化温度、CO2流速等因素对碳酸钙形貌的影响,并在此基础上提出了各自的生长机理。产品用SEM、XRD进行形貌观察和晶型分析,结果显示当以MgCl2作为晶型控制剂时,需在高温、低CO2流速的条件下才能制备出结晶度好、文石相含量高的针状碳酸钙;而当采用ZnSO4作为晶型控制剂时,需在低温、高CO2流速条件下才能制备出单一方解石相的立方状纳米级碳酸钙。在最佳条件下制备的针状碳酸钙的粒径为0.5~2μm,长径比为10~20;制备的立方状碳酸钙的粒径为30~80nm。
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| 关 键 词： | 碳酸钙 碳化法 针状 立方状 生长机理 |
Controllable Synthesis of Calcium Carbonate with Needle-like and Cubic Morphologies and the Crystal Growth Mechanisms |
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| MA Jun,LIU Hua-yan,LIANG Jin,CHEN Yin-fei. Controllable Synthesis of Calcium Carbonate with Needle-like and Cubic Morphologies and the Crystal Growth Mechanisms[J]. Journal of Materials Science and Engineering, 2011, 0(2): 227-232 |
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| Authors: | MA Jun LIU Hua-yan LIANG Jin CHEN Yin-fei |
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| Affiliation: | MA Jun,LIU Hua-yan,LIANG Jin,CHEN Yin-fei(College of Chemical Engineering and Materials Science,Zhejiang University of Technology,State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology,Hangzhou 310014,China) |
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| Abstract: | Need-like and cubic calcium carbonate were synthesized in a stirred bubble tank equipped with a self-made gas distributor by carbonation process of Ca(OH)_2 slurry where MgCl_2 and ZnSO_4 were used as crystal controlling agents.Effects of the main operation conditions including crystal control agent,reaction temperature and flow rate of CO_2 on the particle size and morphology of precipitated calcium carbonate were investigated,and the crystal growth mechanisms were further discussed.The morphology and part... |
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| Keywords: | calcium carbonate carbonation needle-like cubic crystal growth mechanism |
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