Amorphous carbon nanotubes incorporated MgO-graphite composite with enhanced properties for steel making furnaces
Amorphous carbon nanotubes incorporated MgO-graphite composite with enhanced properties for steel making furnaces
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DOI：
10.1016/j.ceramint.2016.07.051
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发表时间：
2016-11-01
影响因子：
5.2
通讯作者：
Chattopadhyay, K. K.
中科院分区：
文献类型：
--
作者：
Halder, D.;Midya, P. R.;Chattopadhyay, K. K.
传统的氧化镁-石墨复合材料在钢包中使用，由于存在炉渣腐蚀和碳快速氧化的固有倾向，使用寿命有限。通过用非晶碳纳米管代替部分石墨来降低总碳含量，从而保持碳的表面积不变或更大，从而改变了镁石墨耐火材料的碳含量。通过x射线衍射和x射线能量色散分析对其结构和成分进行了表征。傅里叶变换红外光谱和拉曼光谱用于发现键信息和独特的碳相。采用场发射扫描电镜和透射电镜研究了非晶态碳纳米管在MgO基体中的分布及其附着性质。无定形碳纳米管的掺入使大孔的累积体积显著减小。用实际熔渣对复合材料进行杯形试验表明，在纳米碳基纳米复合材料中，熔渣的渗透明显减少。(C) 2016 Elsevier Ltd and Techna Group S.r.l版权所有
Conventional MgO-graphite composite used in steel ladles suffer drawbacks like limited lifetime due to slag corrosion and inherent tendency of rapid oxidation of carbon. Carbon content of MgO-graphite refractories was varied by replacing graphite partly by amorphous carbon nanotubes to decrease the total carbon content keeping the surface area of carbon the same or larger. The structural and compositional characterizations were performed by X-ray diffraction and energy dispersive analysis of X-rays. The Fourier transformed infrared and Raman spectroscopies were used to find bonding information and distinctive carbon phases. Distribution of amorphous carbon nanotubes within MgO matrix and its nature of attachment were studied by field emission scanning electron microscopy and transmission electron microscopy respectively. The cumulative volume of the large pores decreased significantly by incorporation of amorphous carbon nanotubes. Cup test using the composite material with actual molten slag indicated significantly less penetration of slag in the nanocarbon based nanocomposite. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.