Diffusion-reaction compromise the polymorphs of precipitated calcium carbonate
文献类型：期刊论文
| 作者 | Wang, Han1,2; Huang, Wenlai1; Han, Yongsheng1 |
| 刊名 | PARTICUOLOGY
 |
| 出版日期 | 2013-06-01 |
| 卷号 | 11期号:3页码:301-308 |
| 关键词 | Calcium carbonate Shape control Crystallization Diffusion Compromise |
| 英文摘要 | Diffusion is seldom considered by chemists and materialists in the preparation of materials while it plays an important role in the field of chemical engineering. If we look at crystallization at the atomic level, crystal growth in a solution starts from the diffusion of ions to the growing surface followed by the incorporation of ions into its lattice. Diffusion can be a rate determining step for the growth of crystals. In this paper, we take the crystallization of calcium carbonate as an example to illustrate the microscopic processes of diffusion and reaction and their compromising influence on the morphology of the crystals produced. The diffusion effect is studied in a specially designed three-cell reactor. Experiments show that a decrease of diffusion leads to retardation of supersaturation and the formation of a continuous concentration gradient in the reaction cell, thus promoting the formation of cubic calcite particles. The reaction rate is regulated by temperature. Increase of reaction rate favors the formation of needle-like aragonite particles. When diffusion and reaction play joint roles in the reaction system, their compromise dominates the formation of products, leading to a mixture of cubic and needle-like particles with a controllable ratio. Since diffusion and reaction are universal factors in the preparation of materials, the finding of this paper could be helpful in the controlled synthesis of other materials. (C) 2013 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Chemical ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Engineering ; Materials Science |
| 关键词[WOS] | CRYSTAL-GROWTH ; NONCLASSICAL CRYSTALLIZATION ; MULTISCALE NATURE ; BUBBLING METHOD ; GEL MEDIA ; MESOCRYSTALS ; MORPHOLOGY ; KINETICS ; PHASE ; NUCLEATION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000319636000008 |
| 公开日期 | 2015-05-27 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/13527]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, EMMS Grp, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100490, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Han,Huang, Wenlai,Han, Yongsheng. Diffusion-reaction compromise the polymorphs of precipitated calcium carbonate[J]. PARTICUOLOGY,2013,11(3):301-308. |
| APA | Wang, Han,Huang, Wenlai,&Han, Yongsheng.(2013).Diffusion-reaction compromise the polymorphs of precipitated calcium carbonate.PARTICUOLOGY,11(3),301-308. |
| MLA | Wang, Han,et al."Diffusion-reaction compromise the polymorphs of precipitated calcium carbonate".PARTICUOLOGY 11.3(2013):301-308. |
入库方式： OAI收割
来源：过程工程研究所
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