SnO_2对C_3S晶体结构及活性的影响机制探讨  

Effect and Mechanism of SnO_2 Doping on Crystal Structure and Active Properties of C_3S

作　　者：虞文锦[1] 陈树东[2] 柯凯[3] 

机构地区：[1]浙江交通职业技术学院,杭州311112 [2]浙江建设职业技术学院,杭州311231 [3]湖北工业大学材料科学与工程学院,武汉430068

出　　处：《硅酸盐通报》2013年第9期1832-1835,1840,共5页Bulletin of the Chinese Ceramic Society

基　　金：浙江省教育厅2012年度科研计划项目:防辐射高胶凝性水泥矿物相配位结构设计与调控(Y201222906)

摘　　要：杂质离子在单矿C3S中的影响规律研究有利于含相关离子废渣在水泥工业上应用。研究SnO2对C3S晶体结构的影响,从SnO2对C3S形成过程出发,通过XRD、SEM、水化热等测试方法,探讨SnO2在C3S中的作用机制。结果表明:少量的SnO2能较好的改善C3S形成环境,增大液相量,促使C3S小晶粒形成;过量的SnO2易与反应体系中的CaO优先反应,生成2CaO·SnO2,限制C3S的进一步形成,且易使C3S团聚成块。同时发现,少量的SnO2可稳定R型C3S,而过量的SnO2只能稳定M型C3S,表现为在水化热曲线中初始放热峰和加速峰时间节点产生区别。Study on impurity ions doped in a single mine C3S can be used as guide in the cement industry. Stating with the formation process of C3S, study on C3S crystal structure doped by SnO2, will be analyzed by XRD, SEM, heat of hydration to explore the mechanism of Sn02 in C3S. The results showed that： a small amount of SnO2 can better improve the C3S formation of the environment, increase the liquid content, and to promote the C3S small grain formation; excessive SnO2 can preferentially react with CaO to form 2CaO · SnO2, which can limit the formation of C3S, and easy to make C3S reunion into blocks. It also found that a small amount of SnO2 can stable the R type of C3S , and excessive SnO2 only stable M-type of C3S, and the time node of the initial exothermic peak and accelerated peak corresponding volatility at the same time.

关 键 词：C3S 晶型 晶界 晶粒 

分 类 号：TQ172[化学工程—水泥工业]