【摘要】 以板状刚玉和熔融石英分别作为Al₂O₃和SiO₂组分,借助薄片法和静态坩埚法研究化学组成对耐火材料抗钠冰晶石侵蚀的影响。研究结果表明,单一的Al₂O₃或SiO₂抗钠冰晶石侵蚀性差,Al₂O₃中加入SiO₂或者SiO₂中加入Al₂O₃,抗钠冰晶石侵蚀性显著改善,当Al₂O₃∶SiO₂（wt%）为20∶80时抗钠冰晶石侵蚀性最好,CRC值仅为6.59%。钠冰晶石完全溶解单一的Al₂O₃,对单一的SiO₂则进行物理渗透,而对Al₂O₃-SiO₂二元体系则发生化学反应生成霞石。高粘度的霞石起着屏障作用,阻碍了钠冰晶石的进一步渗透与侵蚀,提高了抗钠冰晶石侵蚀性。更多还原

【Abstract】 The influence of chemical composition on the corrosion resistance to cryolite of refractory was studied by means of slice method and static crucible method with tabular corundum and fused quartz as components of Al₂O₃ and SiO₂ respectively. It has been showed that single Al₂O₃ or SiO₂ component had poor resistance to cryolite corrosion. Adding SiO₂ to Al₂O₃ or Al₂O₃ to SiO₂ significantly improves the resistance to cryolite corrosion. The resistance to cryolite is best when Al₂O₃∶SiO₂（wt%） is 20∶80, and the CRC value is only 6.59%. Cryolite completely dissolves a single Al₂O₃, and physically penetrates a single SiO₂, while the Al₂O₃-SiO₂ binary system reacts to produce nepheline. The high viscosity nepheline acts as a barrier to further penetration and corrosion of cryolite, and improves the corrosion resistance of cryolite.更多还原