【摘要】 采用X射线衍射、扫描电镜和差热热重分析等测试方法研究了CaF2对硫铝酸钡钙矿物2.75CaO.0.25BaO.3Al2O3.BaSO4(C2.75.B1.25A3S)形成过程的影响,并对高温固相反应过程中出现的物相进行了初步分析。结果表明:CaF2加速了CaCO3的分解,降低了C2.75B1.25A3S的形成温度。当温度低于1 300℃时,CaF2可能促进C2.75B1.25A3S的形成及结晶,并同时伴随着氟铝酸盐矿物11CaO.7Al2O3.CaF2的生成。另外,CaF2对C2.75B1.25A3S的高温分解没有明显的影响。更多还原

【Abstract】 The effects of CaF₂ on the formation course of barium-calcium sulphoaluminate 2.75CaO·0.25BaO·3Al₂O₃·BaSO₄(C_2.75B_1.25A₃（S）) were studied by X-ray diffraction,scanning electron microscopy and differential thermal analysisthermal gravimetric analysis.The phase formed in the sintering process at high temperature was analyzed.The results show that CaF₂ can accelerate the decomposition of CaCO₃,decrease the temperature of C_2.75B_1.25A₃S formation and promote the formation or crystal growth of the mineral below（1 300 ℃）.The compound 11CaO·7Al₂O₃·CaF₂was found in the sintering process of C_2.75B_1.25A₃（S）.In addition,CaF₂ has no remarkable influence on the decomposition temperature of the mineral.更多还原