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Insight into the dual effect of Fe2O3 addition on the crystallization of CaO-MgO-Al2O3-SiO2 glass-ceramics
Zhao, Mingzhi1; Cao, Jianwei2,3; Wang, Zhi2; Li, Guohua1
2019-06-01
Source PublicationJOURNAL OF NON-CRYSTALLINE SOLIDS
ISSN0022-3093
Volume513Pages:144-151
AbstractIn 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.
KeywordCMAS glass-ceramics Iron-rich glass Crystallization Pyroxene Spinel
DOI10.1016/j.jnoncrysol.2019.03.021
Language英语
WOS KeywordMAGNETIC-PROPERTIES ; TIO2 NUCLEANTS ; WASTE ; CR2O3 ; IMMOBILIZATION ; VITRIFICATION ; CRYSTALS ; BEHAVIOR ; ASH ; XRD
Funding ProjectNational Key R&D Program of China[2018YFC1901806]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics ; Materials Science, Multidisciplinary
Funding OrganizationNational Key R&D Program of China
WOS IDWOS:000469890700019
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/29808
Collection中国科学院过程工程研究所
Corresponding AuthorCao, Jianwei; Wang, Zhi
Affiliation1.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
Recommended Citation
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.
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