Enhanced performance of low-carbon MgO-C refractories with nano-sized ZrO2-Al2O3 composite powder
Enhanced performance of low-carbon MgO-C refractories with nano-sized ZrO2-Al2O3 composite powder
复制标题
纳米ZrO2-Al2O3复合粉增强低碳MgO-C耐火材料性能
DOI：
10.1016/j.ceramint.2021.04.024
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发表时间：
2021-06-15
影响因子：
5.2
通讯作者：
Sang, Shaobai
中科院分区：
文献类型：
--
作者：
Chen, Qilong;Zhu, Tianbin;Sang, Shaobai
低碳MgO-C耐火材料在使用中面临着严重的热冲击和渣腐蚀的巨大挑战。本文提出了一种基于纳米 ZrO2-Al2O3 复合粉末掺入的新方法，以提高此类耐火材料的抗热震性和抗渣性。结果表明，ZrO2-Al2O3复合粉末的添加有助于提高其综合性能。特别是含有0.5 wt%复合粉末的试样的抗热震性能显着增强，这与氧化锆的相变增韧以及基体中更多尖晶石相的原位形成有关；此外，相应试样的抗渣性能也得到显着提高，这归因于孔结构的优化和更厚的MgO致密层的形成。
Low-carbon MgO-C refractories are facing great challenges with severe thermal shock and slag corrosion in service. Here, a new approach, based on the incorporation of nano-sized ZrO2-Al2O3 composite powder, is proposed to enhance the thermal shock resistance and slag resistance of such refractories in this work. The results showed that addition of ZrO2-Al2O3 composite powder was helpful for improving their comprehensive performances. Particularly, the thermal shock resistance of the specimen containing 0.5 wt% composite powder was enhanced significantly which was related to the transformation toughening of zirconia and in-situ formation of more spinel phases in the matrix; also, the slag resistance of the corresponding specimen was significantly improved, which was attributed to the optimization of pore structure and formation of much thicker MgO dense layer.