四种镁铁铝材料的物相组成与显微结构表征  

Phase Composition and Microstructure Characterization of Four Magnesia-Hercynite Materials

作　　者：丁达飞 李志坚[1] 栾旭[1] 吴锋[1] 

机构地区：[1]辽宁科技大学高温材料与镁资源工程学院,鞍山114051

出　　处：《人工晶体学报》2014年第11期2908-2912,共5页Journal of Synthetic Crystals

基　　金：国家科技支撑计划(2013BAF09B01);辽宁科技大学开放基金项目(USOL.KEC201411)

摘　　要：分别以烧结铁铝尖晶石、电熔铁铝尖晶石、烧结镁铁砂及电熔镁铁砂为铁载体,在控制试样化学组成接近的前提下,按照镁铁铝尖晶石砖生产工艺制备镁铁铝尖晶石砖试样。采用XRD和SEM对试样的物相组成和显微组织结构进行分析表征。结果表明:铁铝尖晶石试样中,存在(Mg,Fe2+)Al2O4复合相,其中铁以Fe2+的形式存在,并产生少量镁铁尖晶石脱溶物;镁铁砂试样中,形成Mg(Fe3+,Al)2O4复合相,铁以Fe3+的形式存在,并产生了Al Fe2O4连续固溶体相;烧结铁载体试样的显微结构中存在较多微气孔,电熔铁载体试样显微组织结构致密。Controlling the similar chemical compositions, magnesia-hercynite samples were prepared through the production process of the magnesia-hercynite brick, using sintering hercynite, fusedhercynite,sintering magnesia-iron clinker and fused magnesia-iron clinker as iron supports,respectively.The phase composition and microstructure of samples were analyzed and characterized by XRD and SEM respectively. The result shows that samples with added hercynite generate a small amount of spinel phase Mg Fe O4 and form（ Mg,Fe2 ＋） Al2O4 compound with iron existed in the form of Fe2 ＋. The samples with added magnesia-iron clinker generate continuous solid solution Al Fe2O4 and form Mg（ Fe3 ＋,Al）2O4compound with iron existed in the form of Fe3 ＋. Lots of micropores existed in the microstructure of samples with added sintering hercynite and sintering magnesia-iron clinker. Samples with added fused hercynite and fused magnesia-iron clinker possess compact microstructure.

关 键 词：镁铁铝尖晶石材料 铁载体 物相组成 显微组织结构 

分 类 号：TQ174[化学工程—陶瓷工业]