掺杂阳离子在水泥熟料矿物阿利特中的固溶  

SOLID SOLUTION OF DOPED CATIONS IN ALITE FROM CEMENT CLINKER

作　　者：管宗甫[1,2] 陈益民[2] 秦守婉[2] 栗潮[1] 吴春利[1,2] 

机构地区：[1]郑州大学材料科学与工程学院,郑州450052 [2]中国建筑材料科学研究总院,水泥基材料科学重点实验室,北京100024

出　　处：《硅酸盐学报》2007年第4期461-466,共6页Journal of The Chinese Ceramic Society

基　　金：国家"973"(2001CB610701)资助项目

摘　　要：水泥熟料矿物阿利特中固溶有多种杂质离子,这些杂质离子的存在影响到阿利特的微结构和性质。采用微区能谱和电感耦合等离子发射光谱、化学分析等方法分析了阿利特中主要杂质离子Al3+,Fe3+,Mg2+的固溶量,根据缺陷反应分析了其固溶量变化的原因。研究表明:硅率的变化对Al3+,Fe3+,Mg2+的固溶量没有明显的影响;随铝率的增加,阿利特中Al3+的固溶量增加,Fe3+的固溶量减少。随氟磷的掺杂,Al3+的固溶量增加,Fe3+的固溶量减少,其原因是由于磷置换硅和氟置换氧带来的附加正电荷要由铝置换硅附加的负电荷来平衡。随煅烧温度升高以及随淬冷起始温度的升高,Al3+在阿利特中的固溶量升高,Fe3+的固溶量有所降低,Mg2+的固溶量则没有明显变化。氧化气氛下烧成的阿利特中Al3+的固溶量要高于还原气氛下的,而还原气氛下烧成的阿利特中Fe3+的固溶量高于氧化气氛下的。这是由于在还原气氛下,Fe3+会逐步还原为FeO,与钙发生置换时较为容易且不再需要铝与硅的置换来平衡电价。Impurity ions doped in alite affect the structure and properties of alite. Solid solutions of Al^3＋, Fe^3＋, Mg^2＋ in alite were investigated with energy dispersive spectrometer, inductively coupled plasma and chemical analysis. Solid solution quantities were deduced with the defect reactions. The results illustrate that the silica modular does not influence the concentrations regularly. With the increase of iron modular, the concentration of Al^3＋ increases and Fe^3＋ decreases. With the F-and p^5＋ doped in alite, the concentration of Al^3＋ increases and Fe^3＋ decreases. The replacement of silicon by phosphor and oxygen by fluorine will leave a positive charge. The positive charge has to be equalized by a negative charge. The negative charge can be provided by replacement of silicon with aluminum. With increase of clinkering and quenching temperature, the concentrative of Al^3＋ in alite increases, Fe^3＋ decreases and Mg^2＋ does not change distinctly. The concentration of Al^3＋ in alite burnt in oxidative atmosphere is more than when burnt in a reduce atmosphere. And the concentration of Fe^3＋ in alite burnt at reduce atmosphere is more than when burnt in a oxidative atmosphere. In the reduce atmosphere, the Fe^3＋ is reduced to FeO, the replacement of Fe^2＋ with Ca^2＋ brings no charge defects. The replacement reacts easily and no charge has to be balanced by the replacement of silicon with aluminum.

关 键 词：阿利特 杂质离子 固溶量 固溶反应 缺陷 

分 类 号：TQ172.11[化学工程—水泥工业]