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Some New Perspective on the Reaction Mechanism of MgO–SiO 2 –H 2 O System
Author(s) -
Chen Junhong,
Li Tong,
Li Xiaoping,
Chou KuoChih,
Hou Xinmei
Publication year - 2016
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12607
Subject(s) - materials science , chemical engineering , phase (matter) , organic chemistry , chemistry , engineering
The application of MgO–SiO 2 –H 2 O system, one of the most popular basic refractories, is greatly limited because of the hydration of MgO. In this work, the phase and morphological development of MgO–SiO 2 –H 2 O system during aging were analyzed using various techniques. It is found that Mg(OH) 2 initially appears and the amount increases after 10 days aging at room temperature. At elevated temperature, the heat treatment can facilitate the hydration reaction. Mg(OH) 2 covers the surface of silica fume particles. The combination product connects with each other and distributes homogeneously around MgO particles to produce M–S–H gels, which inhibit the further hydration.