MgO对硫铁铝酸钡钙矿物的合成及性能的影响  

INFLUENCE OF MgO ON THE SYNTHESIS AND PERFORMANCE OF CALCIUM-BARIUM SULFO-FERRITEALUMINATE MINERAL

作　　者：刘清[1] 潘正昭[1] 叶正茂[1] 常钧[1] 

机构地区：[1]济南大学材料科学与工程学院,济南250022

出　　处：《硅酸盐学报》2008年第A01期205-208,共4页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50502017);山东省中青年科学家研究奖励基金(2005BS04005)资助项目。

摘　　要：用X射线衍射、扫描电子显微镜和综合热分析等研究了MgO对硫铁铝酸钡钙矿物1.75CaO·1.25BaO·2Al_2O_3·Fe_2O_3·CaSO_4(C_(2.75)B_(1.25)A_2F(?))的合成及性能的影响,并测试了水化样品的抗压强度.结果表明:适量的MgO可降低CaCO_3的分解温度,当MgO掺入质量分数为1%时,C_(2.75)B_(1.25)A_2F(?)矿物形成的温度最低,矿物熟料中f-CaO的质量分数最低,仅为0.22%。水化物,28d时的抗压强度达到最高,为104.2MPa。当MgO的掺量在0.3%～1%时,熟料晶体结晶状况相对较好,晶粒细小,晶界明显,轮廓清晰。The influence of MgO on the synthesis and performance of calcium-barium sulfo-ferritealuminate mineral 1.75CAO·1.25BaO·2Al2O3·Fe2O3·CaSO4（C2.75B1.25A2F^-S） was studied by means of X-ray diffraction, scanning electron microscopy and differential thermal analysis-thermogravimetry. The compressive strength was tested also. The results show that the proper mass fraction of MgO can decrease the decomposition temperature of CaCO3. When the mass fraction of MgO reach 1%, the temperature of C2.75B1.25A2F^-S formation is the lowest, the mass fraction of f-CaO in the clinker is minimal （0.22%）. The compressive strength of hydro-sample at 28d is maximum, reaching 104.2 MPa. The crystallized phase of the clinker crystal had a small grain size and clear outline and crystal boundary when the mass fraction of MgO was in the range of 0.3%-1%.

关 键 词：硫铁铝酸钡钙 微量元素 氧化镁 

分 类 号：TQ172[化学工程—水泥工业]