Insight into the dual effect of Fe2O3 addition on the crystallization of CaO-MgO-Al2O3-SiO2 glass-ceramics

doi:10.1016/j.jnoncrysol.2019.03.021

	Insight into the dual effect of Fe2O3 addition on the crystallization of CaO-MgO-Al2O3-SiO2 glass-ceramics
	Zhao, Mingzhi 1; Cao, Jianwei 2,3; Wang, Zhi 2; Li, Guohua 1
刊名	JOURNAL OF NON-CRYSTALLINE SOLIDS
	2019-06-01
卷号	513 页码:144-151
关键词	CMAS glass-ceramics Iron-rich glass Crystallization Pyroxene Spinel
ISSN号	0022-3093
DOI	10.1016/j.jnoncrysol.2019.03.021
英文摘要	In this paper, an iron-rich CaO-MgO-Al2O3-SiO2 glass-ceramic was prepared basing high iron chromium slag. We employ DSC, XRD and SEM validated the thermal behavior and the microstructure of the glass/glass-ceramics, and reveal a mechanism of the dual effect of high Fe2O3 addition on the crystallization. Here we show that Fe2O3 facilitates the formation of spinel, but inhibits the precipitation of pyroxene. Infrared spectroscopy analysis shows that its promotion to the precipitation of spinel is attributed to the depolymerization of the glass network. Scanning electron microscope observation shows that the inhibition to the crystallization of pyroxene due to the region where nucleation dose not occurs. The increase of Fe2O3 addition enlarges the volume ratio of the non nucleated region in the microstructure, and increases the crystallization activation energy of the pyroxene. In addition, we find that the crystallinity of the glass-ceramics decreased with the increase of Fe2O3 addition, but the average size of the pyroxene grains reduced from 116 +/- 4 nm to 84 +/- 3 nm. We also show that the distribution of chromium in glass-ceramics was largely influenced by Fe2O3 addition. This study is particularly instructive for controlling the crystallization of the iron-rich CMAS glass-ceramics, and provides some insight for solidifying chromium in high iron waste slag.
资助项目	National Key R&D Program of China[2018YFC1901806]
WOS关键词	MAGNETIC-PROPERTIES ; TIO2 NUCLEANTS ; WASTE ; CR2O3 ; IMMOBILIZATION ; VITRIFICATION ; CRYSTALS ; BEHAVIOR ; ASH ; XRD
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000469890700019
资助机构	National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/29807]
专题	中国科学院过程工程研究所
通讯作者	Cao, Jianwei; Wang, Zhi
作者单位	1.China Univ Min & Technol, Dept Mat Sci & Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 3.ZhongkeLangfang Inst Proc Engn, Fenghua Rd 1, Langfang, Hebei, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Mingzhi,Cao, Jianwei,Wang, Zhi,et al. Insight into the dual effect of Fe2O3 addition on the crystallization of CaO-MgO-Al2O3-SiO2 glass-ceramics[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,2019,513:144-151.
APA	Zhao, Mingzhi,Cao, Jianwei,Wang, Zhi,&Li, Guohua.(2019).Insight into the dual effect of Fe2O3 addition on the crystallization of CaO-MgO-Al2O3-SiO2 glass-ceramics.JOURNAL OF NON-CRYSTALLINE SOLIDS,513,144-151.
MLA	Zhao, Mingzhi,et al."Insight into the dual effect of Fe2O3 addition on the crystallization of CaO-MgO-Al2O3-SiO2 glass-ceramics".JOURNAL OF NON-CRYSTALLINE SOLIDS 513(2019):144-151.