【摘要】 采用常规的反应烧结工艺制作铝电解槽侧壁材料用Si₃N₄/SiC时存在不足，为此，提出应用逆反应烧结工艺进行生产性试验的设想。在制备Si₃N₄/SiC复合材料时，常规反应烧结是以Si和SiC为原料经氮化烧结；逆反应烧结是以Si₃N₄和SiC为原料，首先使Si₃N₄反向反应生成活性氧化物后进行烧结。结果表明：该工艺特点是新生的Si₂N₂O或SiO₂进行活性烧结；制品具有良好的物理和化学性能。制品结构紧密，新生氧化物或亚氧化物紧密地充填在Si₃N₄和SiC颗粒间界，新工艺制备的砖的抗冰晶石熔体侵蚀的性能优于常规工艺烧成砖，是铝电解槽侧壁的良好材料。更多还原

【Abstract】 The merit and mechanism of Si₃N₄ bonded SiC materials and the drawback of the traditional reaction sintering process are summarized. The assumption of reverse reaction sintering process is applied in the production for Si₃N₄/SiC materials. In preparing Si₃N₄/SiC composites, Si and SiC as raw materials are react-sintered at nitrogen atmospheres by the conventional production method; while in the reverse reaction sinter process, by using Si₃N₄ ,SiC as raw materials, the Si₃N₄ is firstly converted into reactive oxides, then react-sintered. The new sintering process is accomplished by the reactive sintering of newly formed Si₂ N₂O or SiO₂ phases. The products having excellent physical and chemical properties due to its dense structure and insitu formed oxides or sub-oxides which is full filled at the boundary between Si₃N₄ and SiC particles. The products produced by the new process having dominating property over the traditional production process. The produced Si3 N4/SiC brick is an idea material for side wall of aluminum electrolyte bath.更多还原