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《Journal of The Chinese Ceramic Society》 2002-01
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PREPARATION AND MICROSTRUCTURE OF Al-Mn-PILLARED INTERLAYER MONTMORILLONITE

Cao Mingli, Yu Yanghui, Yuan Jizu, Yu Yongfu (Department of Resource and Environment Engineering, Wuhan University of Technology, Wuhan 430070)  
Pillared montmorillonites are a new family of materials obtained by using inorganic polyhydroxycations to form pillars between the layers of smectitic silicates. Al-Mn_pillared interlayer montmorillonite was prepared using Na-bentonite as starting materials. Pillaring agent solutions were prepared by adding 0.2 mol·L -1 MnCl 2 solution into the solution containing hydroxy-Al oligocations with x (OH -)∶ x (Al 3+ )=2.4. The microstructure and thermal stability of pillared interlayer clays were determined by XRD and FTIR, chemical analysis and calcination tests. The results indicate that, when n (Mn 2+ )∶ n (Al 3+ )=0.5, the d (001) value of the pillared interlayer montmorillonite obtained is 1.898 7 nm. After calcined at 300 ℃, the basal interlayer spacing with high thermal stability is 1.785 9 nm, and the hydroxy-Al-Mn oligocations are introduced into the montmorillonite through chemical bonds, i.e. Si-O-Al or Si-O-Mn.
【Fund】: 国家教育部高等学校骨干教师资助计划资助
【CateGory Index】: TQ110
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