当前位置: X-MOL 学术Metall. Mater. Trans. B. › 论文详情
Rapid and Simple Identification of Free Magnesia in Steelmaking Slag Used for Road Construction Using Cathodoluminescence
Metallurgical and Materials Transactions B ( IF 2.035 ) Pub Date : 2019-10-30 , DOI: 10.1007/s11663-019-01724-8
Susumu Imashuku, Hiroki Tsuneda, Kazuaki Wagatsuma

Reuse of steelmaking slags is important for the effective use of natural resources. Free magnesia (f-MgO) in steelmaking slag may cause serious problems because of a hydration reaction followed by expansion when it is reused for road construction. We present a promising method to identify f-MgO that causes volume expansion rapidly by investigating cathodoluminescence (CL) images and spectra of a steelmaking slag sample. f-MgO emitted red–orange luminescence from a peak at 755 nm. The mineral phases, 3CaO·SiO2 and 2CaO·SiO2, emitted red and yellow luminescence from peaks at 720 and 590 nm, respectively. No luminescence of FeO and 2CaO·Fe2O3 was detected. f-MgO changed its composition in the slag sample that was immersed in hot (70 °C) water for a week. f-MgO that was responsible for the volume expansion (combined content of FeO and MnO below 30 mass pct) retained a red–orange luminescence, whereas the other f-MgO lost luminescence. The CL intensity of the f-MgO that retained luminescence was more than 10 times larger than that of 3CaO·SiO2 and 2CaO·SiO2. Therefore, we can distinguish f-MgO that causes volume expansion by detecting the intense red–orange luminescence from the peak at 755 nm in the CL image within a few seconds.
更新日期:2019-11-01

 

全部期刊列表>>
物理学研究前沿热点精选期刊推荐
chemistry
自然职位线上招聘会
欢迎报名注册2020量子在线大会
化学领域亟待解决的问题
材料学研究精选新
GIANT
ACS ES&T Engineering
ACS ES&T Water
ACS Publications填问卷
屿渡论文,编辑服务
阿拉丁试剂right
南昌大学
王辉
南方科技大学
彭小水
隐藏1h前已浏览文章
课题组网站
新版X-MOL期刊搜索和高级搜索功能介绍
ACS材料视界
天合科研
x-mol收录
赵延川
李霄羽
廖矿标
朱守非
试剂库存
down
wechat
bug