? 2022 Elsevier Ltd and Techna Group S.r.l.Bauxite- and alumina-based spinels were employed as refractory aggregates, and sintered magnesia fine powder, calcium aluminate cement, microsilica, and activated α-Al2O3 were utilized as matrices. The effects of alumina powder, analytically pure zinc oxide, and analytically pure zirconia on the properties of magnesium aluminate spinel–periclase castables were studied. The results demonstrated that the addition of the three additives promoted the sintering of magnesium aluminate spinel–periclase castables. Simultaneously, the three additives significantly improved the high-temperature properties of the samples. The thermal shock resistance of the alumina powder sample increased by 200, that of the pristine zinc oxide sample by 75, and that of the zirconia sample by 125. The additives effectively improved the thermal shock resistance of the magnesium aluminate spinel–periclase castable. In addition, the slag resistance depths of the samples with alumina powder and zirconia were 41 lower than that of the sample without additives, which significantly improved the slag resistance of the magnesium aluminate spinel–periclase castable.
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机译：?2022 Elsevier Ltd 和 Techna Group S.r.l.铝土矿和氧化铝基尖晶石被用作耐火骨料，烧结镁粉、铝酸钙水泥、微硅和活性 α-Al2O3 被用作基质。研究了氧化铝粉、解析纯氧化锌和解析纯氧化锆对铝酸镁尖晶石-方镁石浇注料性能的影响。结果表明，3种添加剂的添加促进了铝酸镁尖晶石-方镁石浇注料的烧结。同时，3种添加剂显著改善了样品的高温性能。氧化铝粉样品的抗热震性提高了200%，纯氧化锌样品提高了75%，氧化锆样品的抗热震性提高了125%。该添加剂有效提高了铝酸镁尖晶石-方镁石浇注料的抗热震性能。此外，添加氧化铝粉和氧化锆的试样的抗渣深度比不添加添加剂的试样低41%，显著提高了铝酸镁尖晶石-方镁石浇注料的抗渣性能。
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