Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8148416 | Journal of Crystal Growth | 2018 | 8 Pages |
Abstract
Changes of crystal morphology and size of calcium sulfate hemihydrate (HH) by Al3+ ions, synthesized by hydrothermal method, were carried out to understand the interaction mechanism between the metal ion and crystal surface. The preferential adsorption of Al3+ on the top crystal surface was confirmed by XPS and ICP-OES, and the interaction mechanism was evaluated by molecular dynamics (MD). It was observed that the Al3+ ions significantly inhibited the HH growth along c-axial. The shape of HH crystal with the increasing of Al3+ ions concentration (0 to 10â¯mM), changed from whiskers to short rod-like. The position of Al3+ ions into the structure by molecular dynamics simulation showed preferential adsorption on active sites of (0â¯0â¯2) face, which inhibited the growth rate and leaded to the formation of short rod-like HH. This provided a guide for the research of calcium sulfate whiskers preparation from industrial gypsum.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Hao Fan, Xingfu Song, Tianjie Liu, Yanxia Xu, Jianguo Yu,