Effect of SiO2 on the Crystal Structure Stability of SFC at 1473 K (1200 A degrees C)
Ding, X; Guo, 马陈燕; Tang K(唐坤); Zhao YD(赵屹东); XM; Ma, CY; Tang, K; Zhao, YD
刊名METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
2015
卷号46期号:3页码:1146-1153
学科分类Materials Science; Metallurgy & Metallurgical Engineering
DOI10.1007/s11663-015-0313-2
文章类型Article
英文摘要Silico-ferrite of calcium (SFC) is a key intermediate phase in the sintering process of fine iron ores, and SiO2 plays an important role in the formation of SFC. In this work, the crystal structure stability of SFC synthesized at 1473 K (1200 A degrees C) has been determined by X-ray diffraction, field-emission scanning electron microscopy, and X-ray absorption spectra. Synthesis of SFC was carried out under air at 1473 K (1200 A degrees C) by mixing different amounts of SiO2 with Fe2O3 and CaCO3. The results show that the maximum solid solubility of SiO2 in the crystal structure of SFC does not exceed 6.11 wt pct at 1473 K (1200 A degrees C); under these conditions, Fe2O3 begins to appear. The process of Si solution is closely related to the presence of a Ca channel composed of Ca octahedron in the crystal structure of SFC based on the results from the measurements of Ca K-edge X-ray absorption spectra. Si mainly occupies the center positions of the upper and lower tetrahedron adjacent to Ca channel. The length of Ca-Ca bond in Ca channel increases with the increasing of Si content. The crystal structure stability of SFC may be related to the structure of the Ca channel.
类目[WOS]Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别SCI ; EI
WOS记录号WOS:000354715800007
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被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228500
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
中国科学院高能物理研究所_多学科研究中心
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Ding, X,Guo, 马陈燕,Tang K,et al. Effect of SiO2 on the Crystal Structure Stability of SFC at 1473 K (1200 A degrees C)[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,2015,46(3):1146-1153.
APA Ding, X.,Guo, 马陈燕.,唐坤.,赵屹东.,XM.,...&Zhao, YD.(2015).Effect of SiO2 on the Crystal Structure Stability of SFC at 1473 K (1200 A degrees C).METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE,46(3),1146-1153.
MLA Ding, X,et al."Effect of SiO2 on the Crystal Structure Stability of SFC at 1473 K (1200 A degrees C)".METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE 46.3(2015):1146-1153.
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