Bi^（3＋）离子改性蒙脱石的研究

Studies on Bi￣(3+) Modification of Montmorillonite

本文研究了用不同浓度Ｂｉ（３＋）离子对蒙脱石改性后的压缩强度和改性后在不同温度下热处理对其压缩强度的影响，并利用ＸＲＤ３、ＳＥＭ、ＴＥＭ研究了Ｂｉ（３＋）离子改性的特性．结果表明：经Ｂｉ（３＋）离子改性的的蒙脱石无论是否经热处理，其压缩强度均获得提高；Ｂｉ（３＋）离子改性使蒙脱石的ｄ（００１）从１４．７３Ａ减小到１３．１５Ａ，同时也降低了蒙脱石的结晶性和高温稳定性．

The effect of initial concentration of Bi(3+) and heat treatment on the compressive strength (σbc)of montmorillonite modified by Bi(3+) has been studied. The characteristic of montmorillonite modified by Bi(3+) was investigated by using XRD, SEM and TEM. The results show that abc increases with or without heat treatment. After Bi(3+) modification, d(001) of montmorillonite is decreased from 14.73A to 13.15A, and the crystallinity and high temperature stability of montmorillonite are also decrsased.