4.6 Article

Performance improvement of MgO-CaO refractories by the addition of nano-sized Al2O3

期刊

MATERIALS CHEMISTRY AND PHYSICS
卷 198, 期 -, 页码 354-359

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2017.06.026

关键词

Magnesia-dolomite; Alumina nanoparticles; Thermal shock resistance; Refractory; Resistance to hydration

向作者/读者索取更多资源

Magnesia-dolomite refractories have advantages such as stability in the basic environments, clean steel production, high corrosion resistance, proper covering in the cement furnace, and low production costs. However, their application is restricted due to low hydration resistance. In this research, the effects of nano and micro alumina particles on the microstructure, sintering behavior, and properties of magnesia dolomite refractories were studied. For this purpose, MgO-CaO refractories were formulated using dolomite and magnetite and 0, 2, 4, 6 and 8 wt percentage nano and micro alumina were added to the formulation. Phase and microstructure analysis of the samples were performed using X-ray diffraction (XRD) and scanning electron microscopy (SEM/EDX), respectively. The results showed that by the addition of both additives (nano and micron size alumina), physical and mechanical properties such as bulk density cold crushing strength, and thermal shock resistance were improved and the hydration tendency of the magnesia-dolomite samples was decreased. However, in the samples containing nano particles, the degree of improvement in the properties was more significant, finally, based on the obtained results and its relationship with the microstructure, the 4 and 8 wt% alumina micro and nano particles was determined as the optimum content, respectively. (C) 2017 Elsevier B.V. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据