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The phase composition and microstructural evolution of a novel MgO-C-Al-Si refractory used in bottom-blowing elements at high temperatures in flowing nitrogen
Yan, Mingwei1; Zhang, Jiayu1; Yang, Yumin2; Liu, Kaiqi1; Sun, Guangchao1
2021-05-01
Source PublicationJOURNAL OF ASIAN CERAMIC SOCIETIES
ISSN2187-0764
Pages12
AbstractA novel MgO-C-Al-Si refractory with low carbon content used in bottom-blowing elements was prepared, and its phase composition and microstructural evolution were investigated by XRD, SEM and EDS after being treated at 1200-1600 degrees C in flowing nitrogen. Results show that the samples are composed of MgO, Al4C3, SiC, Al4SiC4, MgAl2O4, Mg3Al2N4 and Al2O3 at 1200-1400 degrees C, while the samples are composed of MgO, Al4C3, SiC, Al4SiC4, Al4Si2C5, MgAl2O4, Mg3Al2N4 and Al2O3 at 1500-1600 degrees C. Al and Si present gradient reactivity at high temperatures and Al has priority over Si to react with MgO, forming MgAl2O4. Based on the microstructure analysis, we find that the higher the temperatures are, the more abundant the products. Al(g), Al2O(g), SiO(g), Mg(g) and CO(g), as the gas-gas reaction substances, react to form many of Al4SiC4 flakes containing Mg, O and N within pores or gaps of the refractory, along with trace amounts of SiC whiskers and MgAl2O4 spinel whiskers. In addition, the surface morphology of the magnesia aggregates is modified by the MgAl2O4 spinels and Al4SiC4 flakes, owing to the synergistic effect of Al and Si. Further, some physical properties are also characterized.
KeywordMgO-C-Al-Si bottom-blowing element phase composition microstructure nitrogen
DOI10.1080/21870764.2021.1917113
Language英语
WOS KeywordMECHANICAL-PROPERTIES ; CARBON ; BEHAVIOR ; RESISTANCE ; OXIDATION ; ADDITIVES
Funding ProjectKey Research Program of Nanjing IPE Institute of Green Manufacturing Industry (China)[E0010717]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
Funding OrganizationKey Research Program of Nanjing IPE Institute of Green Manufacturing Industry (China)
WOS IDWOS:000646131800001
PublisherTAYLOR & FRANCIS LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/48493
Collection中国科学院过程工程研究所
Corresponding AuthorLiu, Kaiqi
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.AVIC Tianshui New & High Abras Co Ltd, Tianshui City, Peoples R China
Recommended Citation
GB/T 7714
Yan, Mingwei,Zhang, Jiayu,Yang, Yumin,et al. The phase composition and microstructural evolution of a novel MgO-C-Al-Si refractory used in bottom-blowing elements at high temperatures in flowing nitrogen[J]. JOURNAL OF ASIAN CERAMIC SOCIETIES,2021:12.
APA Yan, Mingwei,Zhang, Jiayu,Yang, Yumin,Liu, Kaiqi,&Sun, Guangchao.(2021).The phase composition and microstructural evolution of a novel MgO-C-Al-Si refractory used in bottom-blowing elements at high temperatures in flowing nitrogen.JOURNAL OF ASIAN CERAMIC SOCIETIES,12.
MLA Yan, Mingwei,et al."The phase composition and microstructural evolution of a novel MgO-C-Al-Si refractory used in bottom-blowing elements at high temperatures in flowing nitrogen".JOURNAL OF ASIAN CERAMIC SOCIETIES (2021):12.
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