硅酸二钡的高温合成与水化性能  

High Temperature Synthesis and Hydration Properties of Barium Silicate

作　　者：刘辉敏[1] 王青峰[1] 徐国辉[1] 刘国齐[2] LIU Huimin;WANG Qingfeng;XU Guohui;LIU Guoqi(Luoyang Institute of Science and Technology,Luoyang 471023,China;Sinosteel Luoyang Institute of Refractories Research Co.Ltd.,Luoyang 471039,China)

机构地区：[1]洛阳理工学院材料科学与工程学院,河南洛阳471023 [2]中钢集团洛阳耐火材料研究院有限公司,先进耐火材料国家重点试验室,河南洛阳471039

出　　处：《洛阳理工学院学报（自然科学版）》2020年第1期5-9,共5页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：先进耐火材料国家重点实验室开放课题(201803)。

摘　　要：用碳酸钡(BaCO3)和氧化硅(SiO2)在1400℃保温3 h合成了2BaO·SiO2(B2S)水泥,采用XRD、SEM和TG-DSC等研究了B2S的特征和水化性能。研究结果表明:合成的B2S结晶完整,呈花束状,直径约0.5μm,长度约1μm。该系统中,BaCO3热分解的起始温度、峰值温度和终点温度分别约为826℃、975℃和1148℃,分解活化能为333 kJ/mol。硬化水泥浆体主要有结晶不完整的BaO·SiO2·H2O、Ba(OH)2和未水化的B2S构成。2BaO·SiO2(B2S)cement was synthesized with barium carbonate(BaCO3)and silica(SiO2)at 1400℃for 3 hours.The characteristics and hydration properties of B2S were studied by XRD,SEM and TG-DSC.The results show that the synthesized B2S has complete crystallization and flower-like shape,with a diameter of about 0.5 micron and a length of about 1 micron.In this system,the initial temperature,peak temperature and terminal temperature of thermal decomposition of BaCO3 are about 826℃,975℃and 1148℃,respectively.The decomposition activation energy is 500 kJ/mol.Hardened cement paste mainly consists of incomplete crystalline BaO·SiO2·H2O,Ba(OH)2 and unhydrated B2S.

关 键 词：硅酸二钡 高温合成 水化性能 水泥 

分 类 号：TQ175[化学工程—硅酸盐工业]