MgO膨胀剂的晶格特性与膨胀性能的研究  

Research on Lattice Distortion and Expansion Property of Magnesia Expansive Agent

作　　者：杜兆金[1] 刘加平[2,1] 田倩[2] 闫战彪[1] 

机构地区：[1]南京工业大学,南京210008 [2]江苏省建筑科学研究院

出　　处：《膨胀剂与膨胀混凝土》2010年第1期20-23,共4页 Expansive Agents & Expansive Concrete

摘　　要：以菱镁矿为原料,制备MgO膨胀剂。通过扫描电镜、X射线衍射和红外吸收光谱等手段对所得的产物表征分析,并考察了其在水泥浆体中的膨胀性能。结果表明,随着煅烧温度的升高,晶面间距变小,晶粒尺寸变大,晶格畸变减小;其红外吸收峰同时出现红移和蓝移现象;养护温度对掺高温煅烧MgO的净浆试件膨胀率影响较大。The MgO expansive agent was prepared with the magnesite as raw material.SEM,X-ray diffraction,FIT measurements were used to investigate its characteristic,and the expansive behavior in cement paste was studied.The result showed that with the calcining temperature increasing,interlinear spacing and lattice distortion decreased,while grain size increased.And red shift and blue shift existed simultaneously in the infra-red absorption.The expansion of calcined magnesia was greatly affected by curing temperature.

关 键 词：MGO 晶格畸变 红外特性 膨胀率 

分 类 号：TU528.042.4[建筑科学—建筑技术科学]