| 摘要: |
| 在水热法制备α CaSO4·05H2O工艺中，需要加入晶习改变剂来调控α CaSO4·05H2O晶体形貌.根据晶习改变剂对α CaSO4·05H2O晶体端面构造以及晶面结构的影响，探讨了不同晶习改变剂调控α CaSO4·05H2O晶体形貌的作用机理.结果表明：Al3+和有机酸都能改变α CaSO4·05H2O晶体的生长习性，但是作用方式不同.Al3+主要作用于α CaSO4·05H2O晶体的{001}面族；有机酸单独存在时其酸根离子则主要吸附于α CaSO4·05H2O晶体的锥面面族；有机酸根离子和Al3+共同存在时，会形成络合离子，结合在α CaSO4·05H2O晶体的{001}面族. |
| 关键词: α CaSO4·05H2O 晶习改变剂 晶体形貌 |
| DOI：103969/j.issn1007 9629201402018 |
| 分类号: |
| 基金项目:长江学者和创新团队发展计划项目（IRT1146）；江苏高校优势学科建设工程项目（2011 6）；国家建筑材料行业科技创新计划项目（2013 M4 3） |
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| Mechanism of Crystal Growth Habit Modifiers onthe Morphology of α CaSO4·05H2O Crystal |
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TANG Mingliang, SHEN Xiaodong, HUANG Jinlong
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College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
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| Abstract: |
| Crystal growth habit modifiers were used to control the morphology of α CaSO4·05H2O crystal prepared by hydrothermal method. The mechanism of habit modifiers controlling the crystal shape of α CaSO4·05H2O of habit modifiers was discussed on the basis of influences of habit modifiers on the shape of crystal terminal ends and the structures of crystal faces. The results show that Al3+and organic acids all can change the morphology of α CaSO4·05H2O crystal and the crystal faces they affected are different. Al3+mainly act on the {001} faces. When organic acids exist alone, they would adsorb on the pyramidal faces of α CaSO4·05H2O crystal terminal ends. When Al3+coexist with organic ions, they would form complex ions and adsorb on the {001} faces of α CaSO4·05H2O crystal. |
| Key words: α CaSO4·05H2O crystal growth habit modifier crystal morphology |
