Effect of crystal surface activity on morphology of α-calcium sulfate hemihydrate regulated by succinic acid

被引：0

作者：

Fan R.-H. ^{[1
]}

He J.-Y. ^{[1
]}

Zheng R.-J. ^{[1
]}

Guan Q.-J. ^{[2
]}

Chi R.-A. ^{[3
]}

Gao Z.-Y. ^{[1
]}

机构：

[1] School of Minerals Processing and Bioengineering, Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Hunan International Joint Research Center for Efficient and Clean Utilization of Criti

[2] School of Resource Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan

[3] Hubei Three Gorges Laboratory, Yichang

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2023年 / 33卷 / 06期

基金：

中国国家自然科学基金;

关键词：

crystal morphology control; crystal surface activity; first-principles; succinic acid; α-calcium sulfate hemihydrate;

D O I：

10.11817/j.ysxb.1004.0609.2022-43342

中图分类号：

学科分类号：

摘要：

The crystal morphology determines the physicochemical properties and application fields of α-calcium sulfate hemihydrate (α-HH). In this paper, first-principles calculations and Wulff construction were used to reveal the effect of difference of crystal surface activity on the control of α-HH crystal morphology by succinic acid. The results show that, the (204) surface is the key surface for α -HH crystal morphology control. The continuous distribution and high density of Ca2+ ions make the (204) surface highly active, which is beneficial to the adsorption of the modifiers. Succinic acid cyclically adsorbs on the (204) surface of α-HH in the form of O—Ca ionic bond. The highly active crystal surfaces of α-HH are preferentially adsorbed and inhibited by the modifiers. Therefore, the crystal morphology is shortened along the direction of the highly active crystal surface. When the amount of modifiers is excessive, the growth of each crystal surface is inhibited, and the crystal morphology is controlled. © 2023 Central South University of Technology. All rights reserved.

引用

页码：1994 / 2003

页数：9

共 42 条

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