CAJ | 학술논문

通过高温烧结法在不同钙铝比(C/A)的条件下合成了铝酸钙熟料。利用XRD对不同C/A下合成产物进行物相分析，对含量进行半定量分析，并计算其晶格常数。采用SEM观察不同C/A下合成产物的显微结构，并通过EDS佐证所得物相；最后研究了不同C/A下氧化铝的溶出性能。结果表明：当C/A＜1.6时得到的产物为CaO·Al2O3和11.3CaO·7Al2O3（C11.3A7），且随着C/A的增大，C11.3A7的含量增高，氧化铝的溶出率提高；当C/A＝1.6时得到的产物只有 C11.3A7，溶出率达到最大；当 C/A＞1.6时由于3CaO·Al2O3的形成，溶出率有所降低。C11.3A7晶格中CaO的缺失，促进了溶出反应的进行。
통과고온소결법재불동개려비(C/A)적조건하합성료려산개숙료。이용XRD대불동C/A하합성산물진행물상분석，대함량진행반정량분석，병계산기정격상수。채용SEM관찰불동C/A하합성산물적현미결구，병통과EDS좌증소득물상；최후연구료불동C/A하양화려적용출성능。결과표명：당C/A＜1.6시득도적산물위CaO·Al2O3화11.3CaO·7Al2O3（C11.3A7），차수착C/A적증대，C11.3A7적함량증고，양화려적용출솔제고；당C/A＝1.6시득도적산물지유 C11.3A7，용출솔체도최대；당 C/A＞1.6시유우3CaO·Al2O3적형성，용출솔유소강저。C11.3A7정격중CaO적결실，촉진료용출반응적진행。
Calcium aluminate clinkers with different calcium/aluminum ratios (C/A) were obtained by the high-temperature sintering method. Phase composition, phase semi-quantitative content and crystal constant of sinter were studied with different C/A by XRD. SEM and EDS were used to observe microstructure and element contents. The alumina leaching property of sinter was studied. When C/A was lower than 1.6, the products were CaO·Al2O3and 11.3CaO·7Al2O3 (C11.3A7) and increase of calcium/aluminum ratio could lead to increase in the content of C11.3A7and leaching ratio of alumina. When C/A was 1.6, the phase was almost completely C11.3A7and the leaching rate of alumina reached a maximum. When C/A was higher than 1.6, the products were C11.3A7and 3CaO·Al2O3, and the leaching rate of alumina decreased accordingly. The lack of CaO in C11.3A7lattice improved the leaching reaction.