| Na5P3O10-Ca(OH)2-CO2-H2O体系纳米CaCO3的成核与生长 |
| The Nucleation and Growth of Nanometer CaCO3in the Na5P3O10-Ca(OH)2-CO2-H2O System |
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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-CaOH-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CaOH2的碳化反应具有抑制作用。随着Na5 |
| 关键词: 纳米CaCO3 Na5P3O10 成核速率 生长速率 |
| 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 |
| 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 of[Na5P3O10].The CaCO3crystal growth experienced the long distance diffusion and ag-glomeration growth stages when[Na5P3O10]=0ppm.While[Na5P3O10]=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. |
| Keywords: nanometer CaCO3 Na5P3O10 nucleation rate growth rate |
| 投稿时间：2001-05-16 修订日期：2001-06-25 |
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| 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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