Mechanism of Polymerization Reaction During the Solidification of Meta-Kaolin Based Mineral Polymer

摘要：

Products of mineral polymer were prepared from metakaolin in this research. The mechanism of polymerization was deduced from the analytical data of XRD,IR,SEM and MAS-NMR. Several stages were produced during the solidification of meta-kaolin-based mineral polymer,that is,firstly, the Si-O-Si,Al-O-Si bonds of the meta-kaolin were broken in the high molar alkaline solution; Parallel to this process,complexes and polymerized species (-Si-O-Na, Al(OH)4-,Al(OH)52-,Al(OH)63-) formed; secondly,aluminosilicate zeolite precursors or precipitates formed; finally,by dehydration,the precursors tumed into the non-crystaline phase,in which Q4(2Al) were the main forms of Si element,and tetrahedral aluminum were the main form of Al element in the mineral polymer products cured for 28 days. The experimental results provided a good basis for understanding the formation of mineral polymer.

关键词： Meta-kaolin Mineral Polymer Aluminosilicate Polymerization Mechanism

作者: Nie Yimiao Ma Hongwen Liu Shuxian Niu Fusheng

作者单位: National Laboratory of Mineral Materials,China University of Geosciences,Beijing 100083,China Depart National Laboratory of Mineral Materials,China University of Geosciences,Beijing 100083,China Department of Resource and Environment,Hebei Polytechnic University,Tangshan 063009,China

会议类型: 国际会议

会议名称: Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)

会议地点: 南昌

会议语种:英文

页码: 628-635

在线出版日期: 2010-04-28（万方平台首次上网日期，不代表论文的发表时间）