| Na5P3O10-Ca(OH)2-CO2-H2O体系纳米CaCO3的成核与生长 |
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| 引用本文： | 林荣毅,张家芸,张培新.Na5P3O10-Ca(OH)2-CO2-H2O体系纳米CaCO3的成核与生长[J].无机化学学报,2001,17(6):787-793. |
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| 作者姓名： | 林荣毅 张家芸 张培新 |
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| 作者单位： | 林荣毅（北京科技大学理化系,北京,100083）;林荣毅（广西大学化学化工学院,南宁,530004）;张家芸（北京科技大学理化系,北京,100083）;张培新（广西大学化学化工学院,南宁,530004） |
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| 基金项目： | 国家自然科学基金资助项目(No.59864001),广西自然科学基金匹配资助项目(No.桂科配9912006). |
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| 摘 要： | 通过化学分析、SEM显微分析技术，结合Rosin-Ramiler概率统计理论，从介观层次研究Na5P3O10-Ca(OH)2-CO2-H2O体系纳米CaCO3的合成反应及其成核和生长过程。结果表明，Na5P3O10对Ca(OH)2的碳化反应具有抑制作用。随着Na5P3O10]的增加，体系中CaCO3的成核速率B^0逐渐增大。在Na5P3O10]＝0ppm时，CaCO3结晶的生长由长程扩散和凝聚生长控制；Na5P3O10]=380.4,760.9ppm时，前期受短程扩散和界面反应控制、后期受长程扩散控制。Na5P3O10的存在，抑制了纳米CaCO3的晶体生长。
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| 关 键 词： | 纳米CaCO3 Na5P3O10 成核速率 氢氧化钙 生长速率 磷酸钠 纳米碳酸钙 合成 形态控制 |
| 收稿时间： | 2001/5/16 0:00:00 |
| 修稿时间： | 2001年5月16日 |
The Nucleation and Growth of Nanometer CaCO3in the Na5P3O10-Ca(OH)2-CO2-H2O System |
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| LIN Rong-Yi,ZHANG Jia-Yun and ZHANG Pei-Xin.The Nucleation and Growth of Nanometer CaCO3in the Na5P3O10-Ca(OH)2-CO2-H2O System[J].Chinese Journal of Inorganic Chemistry,2001,17(6):787-793. |
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| Authors: | LIN Rong-Yi ZHANG Jia-Yun and ZHANG Pei-Xin |
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| Institution: | University of Science and Technolog y Beijing, Beijing 100083;College of Chemistry and Chemical Engineering, Guangxi University, Nan ning 530004,University of Science and Technolog y Beijing, Beijing 100083 and College of Chemistry and Chemical Engineering, Guangxi University, Nan ning 530004 |
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| Abstract: | The nanometer CaCO3synthesis reaction,nucleation and growth in Na5P3O10-Ca (OH)2-CO2-H2O system were investigated using chemical analysis,SEM and Rosin-Ramul er probability statis-tics theory.The nucleation rate B0 was calculated using mass and popula tion balance.The results showed that the Ca (OH)2carbonation reaction can be inhibited by Na5P3O10.In the crystallization process,the CaCO3 nucleates rapidly in the initial sta ge,and then the nucleation rate B0 decreases gradually.In the system which CaCO3]=0,380.4ppm,the tiny CaCO3nuclei dissolve and the nucleation rate is negative at the fi nally stage.The CaCO3nucleation rate B0 increases with the increase ofNa5P3O10].The CaCO3crystal growth experienced the long distance diffusion and ag-glomeration growth stages whenNa5P3O10]=0ppm.WhileNa5P3O10]=380.4,760.9ppm,the nanometer CaCO3nucleus growth is controlled by the s hort distance diffusion and interfa ce reaction at first,and then it is controlled by th e long distance diffusion while CaCO3nucleus growth according to parabola law(n=0.4878,4.884).Na5P3O10is able to inhabit the growth of nanom eter CaCO3crys-tal. |
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| Keywords: | nanometer CaCO3 Na5P3O10 nucleation rate growth rate |
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