Preparation and thermal stability of La-Al pillared montmorillonite prepared by power ultrasonics treatment

被引：0

作者：

Ding, Shu-Li ^{[1
,2
]}

Peng, Su-Ping ^{[1
]}

Liu, Qin-Fu ^{[1
]}

机构：

[1] Sch. of Resources and Safety Eng., China Univ. of Mining and Technol., Beijing 100083, China

[2] Hebei Inst. of Arch. Sci. and Tech., Handan 056038, China

来源：

Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology | 2003年 / 32卷 / 05期

关键词：

Aluminum - Lanthanum - Thermodynamic stability - Ultrasonics;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

La-Al pillared montmorillonite was prepared by reacting montmorillonite mixture of aluminum chlorohydrate and lanthanum nitrate under power ultrasonics treatment with the input power of 250 W and the frequency of 20 kHz. The pillaring solution for forming La-Al montmorillonite has an OH/A1 ratio of 2.4, and a La/Al ratio of 1/20. The La-Al pillared montmorillonite is characterized by basal spacing of about 2.65 nm, and its pillared structure is stable at a temperature lower than 650°C. The large spacing and high thermal stability of La-Al pillared montmorillonite are related to the formation of La-bearing Johansson cations intercalated into montmorillonite under the power ultrasonics treatment.

引用

页码：496 / 499