欢迎访问《高校地质学报》官方网站,今天是
分享到:

J4

• 文章目录 • 上一篇    下一篇

锂改性蒙脱石矿物中锂的化学状态研究

陈文1 2, 徐庆1 2, 袁润章2   

  1. 1. 武汉工业大学 材料学院, 湖北 武汉 430070;材料复合新技术国家重点实验室, 湖北 武汉 430070;2. 材料复合新技术国家重点实验室, 湖北 武汉 430070
  • 收稿日期:2000-06-20 修回日期:2000-06-20 出版日期:2000-06-20 发布日期:2000-06-20

The Chemical States of Lithium in Lithium-Exchanged Montmorillonite Mineral

CHEN Wen1;2, XU Qing1;2, YUAN Run-zhang2   

  1. 1. Institute of Materials Science and Engineering; 2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan
  • Received:2000-06-20 Revised:2000-06-20 Online:2000-06-20 Published:2000-06-20

摘要: 采用XRD、IR、XPS等测试方法,对锂改性蒙脱石矿物中锂 的化学状态进行分析,发现锂改性过程中,Li+离子不仅与蒙脱石层间吸附阳离子进行交 换,还能置换蒙脱石晶格八面体中的阳离子和进入间隙位置。Li+离子是以三种化学状态 存在于蒙脱石晶格结构中。

Abstract: The montmorillonite is an aluminosilicate mineral which has 2:1 type la yered structure. The cation exchange in interlayer is an important feature. The montmorillonite is treated by means of lithium exchange in this paper. The che mical states of lithium in lithium-exchanged montmorillonite are analyzed by X RD, IR and XPS etc. The results show that the lithium-exchange is different fro m the other cation-exchange in montmorillonite. Because of smaller ionic radius of Li+ ion, Li+ ions can not only exchange with the absorbed cations in mon tmorillonite interlayer, but also replace the cations in the octahedral sites an d enter into the interstitial positions of montmorillonite lattice. There are th ree chemical states of lithium existing in montmorillonite lattice structure. Among them, number of absorbed Li+ ions in interlayer is more than that of Li+ ions in the replacement and interstitial positions.