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无机材料学报

无机材料学报

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水热法合成4A沸石的相变/纳米聚合生长过程及其机理研究

黄志良1,2; 张联盟2; 刘羽1; 汪奇林1; 陈伟1; 何前军1   

  1. 1. 武汉化工学院材料科学与工程学院, 武汉 430073; 2. 武汉理工大学材料复合新技术国家重点实验室, 武汉 430070
  • 收稿日期:2004-02-16 修回日期:2004-04-01 出版日期:2005-03-20 网络出版日期:2005-03-20

Phase Transition/Nano Aggregation Growth Process of Zeolite 4A Prepared by Hydrothermal Synthesis and Its Mechanism

HUANG Zhi-Liang1,2; ZHANG Lian-Meng2; LIU Yu1; WANG Qi-Lin1; CHEN Wei1.HE Qian-Jun1   

  1. 1. Department of Material Engineering; Wuhan Institute of Chemical Technology; Wuhan 430073; China; 2.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing; Wuhan University of Technology; Wuhan 430070; China
  • Received:2004-02-16 Revised:2004-04-01 Published:2005-03-20 Online:2005-03-20

PDF (PC)

1121

被引次数

19

摘要： 用廉价的硅铝系渣料为原料,通过水热法合成了4A沸石,根据不同时间的晶化反 应产物,用XRD、SEM等表征手段对4A沸石的形成机理及晶体长大过程进行了研究,结果 表明:①该反应过程的机理属前驱体固相→硅酸根或铝酸根液相→P型沸石晶相→P型沸石 向A型沸石的相变→A型沸石向P型沸石逆相变;②4A沸石晶体的长大是通过纳米聚合生 长的结果.

关键词: 4A沸石, P型沸石, 水热法, 相变, 纳米聚合生长

Abstract: Zeolite 4A was prepared successfully by hydrothermal synthesis, using cheap Si-Al slag as raw materials. Formation mechanism of 4A zeolite and crystal growth process were studied by some characterized measurements, such as XRD, SEM etc, based on crystallized productions at different reaction time. The results indicate that (1) the reaction mechanism of the process is precursors state phase→SiO32-or AlO2- liqulid phase→zeolite P crystallization phase→phase transition from zeolite P to zeolite 4A→reversible phase transition from zeolite 4A to zeolite P; (2) zeolite 4A growth is the results of nano aggregation growth.

Key words: zeolite 4A, zeolite P, hydrothermal synthesis, phase transition, nano aggregation growth

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