| Oxidation Mechanisms in MgO-C Refractories |
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| 引用本文： | B.Hashemi Z.AliNemati S.K.Sadrnezhaad. Oxidation Mechanisms in MgO-C Refractories[J]. 中国耐火材料, 2004, 13(2): 13-20 |
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| 作者姓名： | B.Hashemi Z.AliNemati S.K.Sadrnezhaad |
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| 作者单位： | DepartmentofMaterialsScienceandEngineering,SharifUniversityofTechnology,Tehran,Iran,11365-9466 |
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| 摘 要： | An investigation on the oxidation mechanism of the graphite in the MgO-C refractory materials is helpful to improving both the quality of these materials and to preventing and/or lowering of the adverse effects of the high - temperature oxidation. In this research, the oxidation behavior of the MgO-C refractories containing 5～20wt% graphite was studied via weight-loss method. Atmospheric air was used for oxidation at temperatures ranging from 900℃ to 1300℃ and the experimental data were compared with those obtained from the dimensionless kinetic equations of the shrinking core model, in order to determine the oxidation mechanisms of the refractories. The best fit wasachieved with the porous layer diff~ion control regime. Oxidation mechanism tends, however, to slightly deviate from pure pore diffusion control to pore diffusion - external gas transfer regime in the samples having more graphitecontents ( e. g. 20% ).
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| 关 键 词： | MgO 耐火材料 氧化物 C 碳 氧化镁 温度 |
Oxidation Mechanisms in MgO-C Refractories |
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| B.Hashemi,Z.Ali Nemati and S.K.Sadrnezhaad. Oxidation Mechanisms in MgO-C Refractories[J]. China’s Refractories, 2004, 13(2): 13-20 |
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| Authors: | B.Hashemi Z.Ali Nemati S.K.Sadrnezhaad |
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| Affiliation: | B.Hashemi,Z.Ali Nemati and S.K.Sadrnezhaad Department of Materials Science and Engineering,Sharif University of Technology,Tehran,Iran,11365-9466 |
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| Abstract: | |
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| Keywords: | MgO Carbon Diffusion Refractories Oxidation |
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