MgO对钙硅体系水热反应产物的影响研究  

STUDY OF THE INFLUENCE OF MgO ON CaO-SiO_2-H_2O SYSTEM UNDER HYDROTHERMAL CONDITION

作　　者：徐光亮[1] 赖振宇[1] 钱光人[1] 杨世源[1] 周歧雄[2] 

机构地区：[1]西南工学院材料科学与工程系,四川绵阳621002 [2]新疆工学院化学工程系,乌鲁木齐830008

出　　处：《硅酸盐学报》2000年第2期100-104,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金! ( 59674 0 3 4 );国家建材局行业基金!(J -96-2 0 )资助项目

摘　　要：研究了MgO对钙硅水热体系的影响 .结果表明 :MgO可促进水化硅酸钙的形成 ,有利于托勃莫来石向硬硅钙石 ,Z相向白钙沸石的转化 .Mg2 + 优先固溶于水化硅酸钙中 ,随温度的升高 ,固溶量增大 .固溶后剩余的Mg2 + 在 2 0 0℃以下形成Mg(OH) 2 ,2 4 0℃以上形成蛇纹石 .Mg2 + 的固溶将影响水化硅酸钙的形貌 .The influence of MgO on CaO-SiO_2-H_2O system under hydrothermal condition was studied. Results indicate that MgO can promote the forming of calcium silicate hydrates and improve the exchange of tobermorite to xonotlite, Z phase to gyrolite. Mg^2+ can substitute Ca^2+ in calcium silicate hydrates initially, and under higher temperature, the more amount of substitution will be undertaken. The susplus amount of substitution, Mg^2+ will form Mg(OH)_2 below 200 ℃. White,chrysotile is formed over 240 ℃. The substitution of Mg^2+ also influences the SEM micrograph of calcium silicate hydrates.

关 键 词：钙硅镁 水热体系 氧化镁 水化硅酸钙 

分 类 号：TQ132.32[化学工程—无机化工]