Mechanism of phase separation in BFS (blast furnace slag) glass phase

XRD, TEM, ED, and NMR analyzed four types of blast furnace slags (BFS) with different structures in this paper. The composition requirement for phase separation in BFS glass phase was then put forward, that is the composition of slag locates in the coexisting phase region of melilite and any silicat...

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Bibliographic Details
Published in:Science China Technological Sciences 2011, Vol.54 (1), p.105-109
Main Authors: Li, Yu, Liu, XiaoMing, Sun, HengHu, Cang, DaQiang
Format: Article
Language:English
Subjects:
Engineering
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Summary:XRD, TEM, ED, and NMR analyzed four types of blast furnace slags (BFS) with different structures in this paper. The composition requirement for phase separation in BFS glass phase was then put forward, that is the composition of slag locates in the coexisting phase region of melilite and any silicate mineral with Q 0 units. The special structure of melilite units, a 5-membered ring with high degree of polymerization (DOP), plays a key role in the formation of phase separation. In BFS system, one with chemical composition of larger ratio of (CaO + MgO/(SiO 2 + Al 2 O 3 ) would be more promising to meet the requirement for phase separation.
ISSN:1674-7321
1862-281X
DOI:10.1007/s11431-010-4109-y