Effect of SiO2 on the Crystal Structure Stability of SFC at 1473 K (1200 A degrees C)

	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
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.
学科主题	Materials Science; Metallurgy & Metallurgical Engineering
类目[WOS]	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
收录类别	SCI ; EI
WOS记录号	WOS:000354715800007
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228500]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	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.