V^(5+)及Cr^(3+)掺杂对C_2S多晶型的影响机制  

Influence of V^(5+) and Cr^(3+) Doping on Polymorphic Forms of C_2S

作　　者：钟侚[1] 蹇守卫[2] 柯凯[2] 

机构地区：[1]武汉科技大学城市建设学院,湖北武汉430065 [2]武汉理工大学硅酸盐工程中心,湖北武汉430070

出　　处：《济南大学学报（自然科学版）》2011年第4期349-353,共5页Journal of University of Jinan(Science and Technology)

基　　金：湖北省自然科学基金(2010CDZ062);湖北省科技厅对口援助项目(20091g0097)

摘　　要：在水泥生料中分别掺入质量分数为0.5%、1.0%、1.5%、2.0%和3.0%的V2O5和Cr2O3,煅烧至1 550℃,研究V5+和Cr3+掺杂对C2S多晶型形成过程的影响。经化学分析、X射线衍射(XRD)、扫描电镜(SEM)和红外光谱(ET-IR)等方法分析,结果表明:当V2O5和Cr2O3质量分数分别大于0.5%和1.5%时,稳定β-C2S效应逐步明显,且高掺量V2O5能促使α-C2S形成;Cr2O3掺杂使w(f-CaO)呈递增变化,而V2O5掺杂使w(f-CaO)呈先增大后减小趋势变化;高温热特性及形貌分析证明:V5+和Cr3+易富集在β-C2S晶界或位错上,阻碍γ-C2S的形成,同时约束β-C2S的晶粒尺寸。The effect of doped V5＋ and Cr3 ＋ on the formation of C2 S was studied, including sample with nothing added in and some samples which were added with foreign oxides V2 05, Cr203 respectively by 0.5 %, 1% ,2% and 3 %, all calcined at 1 550 ~C. By means of chemical analysis, XRD, SEM and infrared spectroscopy analysis, the effect mechanism of V5＋ and Cr3 ＋ was discussed. The results can be get：both V2O5 and Cr2O3 can stabilize β-C2S obviously, when the adding content exceeds O. 5% and 1.5% respectively, and high content of V2O5 can cause α-C2 S to form ;when Cr203 doped, the content of f-CaO keeps increasing if the content adds, but when V2O5 doped, the content of f-CaO increased firstly and then decreased. Combining high temperature-chemical properties of V2O5, Cr2 O3 with their SEM analysis,it is shown that V5 ＋ and Cr3＋ are easily concentrated in crystal boundary and line defect of β-C2 S, which hin- ders the formation of α-C2 S and restrains the grain size of β-C2 S.

关 键 词：Β-C2S γ-C2S 掺杂 配位 

分 类 号：TQ172.11[化学工程—水泥工业]