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首页> 外文会议>第七届国际耐火材料学术会议（ISR2016）论文集 >Preparation of MgO-Fe3O4 Materials and Their Corrosion Resistance to AlF3-Na3AlF6-K3AlF6
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Preparation of MgO-Fe3O4 Materials and Their Corrosion Resistance to AlF3-Na3AlF6-K3AlF6

机译：MgO-Fe3O4材料的制备及其对AlF3-Na3AlF6-K3AlF6的耐蚀性

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In the present paper, novel sidewall materials for aluminum reduction cell were prepared in air using magnesia and magnetite as starting materials.The sintering behaviors of the specimens have been investigated by means of X-ray diffraction (XRD),scanning electron microscope (SEM).And corrosion tests in a Na3AlF6-AlF3-K3AlF6 bath were conducted to evaluate the electrolyte corrosion resistance.The results show that the Fe3O4 phase is transformed into Fe2O3 at high temperatures, which in turn reacts with the MgO added to form MgFe2O4 spinel And with increasing the MgO content from 0 to 30 wt％,densification of the specimens decreases mainly due to larger volume expansion resulting from formation of more MgFe2O4.The corrosion tests show that corrosion layers are produced in all the MgO added specimens.However, for specimens containing MgFe2O4 phase only, Mg(Al, Fe)2O4 composite spinel layers are also generated, which remarkably improved the corrosion resistance of the specimens.
机译：本文以氧化镁和磁铁矿为原料，在空气中制备了新型的铝还原电池侧壁材料。通过X射线衍射（XRD），扫描电子显微镜（SEM）研究了样品的烧结行为。并在Na3AlF6-AlF3-K3AlF6浴中进行了腐蚀试验，以评估电解质的耐腐蚀性。结果表明，Fe3O4相在高温下转化为Fe2O3，然后与所添加的MgO反应形成MgFe2O4尖晶石，并与将MgO含量从0增加到30 wt％，样品的致密化降低主要是由于形成更多的MgFe2O4而导致更大的体积膨胀。腐蚀试验表明，所有添加了MgO的样品都产生了腐蚀层。仅生成MgFe2O4相，也会生成Mg（Al，Fe）2O4复合尖晶石层，从而显着提高了样品的耐蚀性。

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