Influence of time and temperature on ageing and phases synthesis in the MgO-SiO2-H2O system

被引：88
作者：
Szczerba, Jacek [1 ]
Prorok, Ryszard [1 ]
Sniezek, Edyta [1 ]
Madej, Dominika [1 ]
Maslona, Konrad [1 ]
机构：
[1] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, PL-30059 Krakow, Poland
来源：
THERMOCHIMICA ACTA | 2013年 / 567卷
关键词：
Thermal analysis; M-S-H; Refractories; Basic castables; Magnesia; Microsilica; MAGNESIUM-SILICATE HYDRATE; DISSOLUTION; CASTABLES; MGO;
D O I：
10.1016/j.tca.2013.01.018
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The behaviour of the mixture of MgO and SiO2 with water was studied and analyzed by DTA-TGA-EGA and XRD after ageing for 1,3, 10,30 and 180 days at 20 degrees C. The samples also were aged at 30 degrees C and 40 degrees C for 1 and 3 days. Additionally, after 180 days the samples were heated in 500 degrees C, 700 degrees C and 900 degrees C for 24 h. The paste was composed of magnesium oxide and rnicrosilica in 1:1 molar ratio and water in addition of 50%wt. of oxides. The DTA-TGA-EGA curves in the temperature range 20-950 degrees C were analyzed. The aim of this work was to study the reaction and phase composition in the MgO-SiO2-H2O phase system. This system has wide applications in refractory materials, especially in basic castables. The compounds of this system may constitute an innovative bonding phase in a new generation basic castables. (C) 2013 Elsevier B.V. All rights reserved.
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收藏
页码：57 / 64
页数：8
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