Hydration of Ca7ZrAl6O18 phase

被引：17

作者：

Madej, Dominika ^{[1
]}

Szczerba, Jacek ^{[1
]}

Nocun-Wczelik, Wieslawa ^{[1
]}

Gajerski, Ryszard ^{[1
]}

机构：

[1] AGH Univ Sci & Technol, Fac Mat Sci & Ceram, PL-30059 Krakow, Poland

来源：

CERAMICS INTERNATIONAL | 2012年 / 38卷 / 05期

关键词：

X-ray methods; Microstructure-final; Ca7ZrAl6O18; Hydration; Unshaped refractories (castables); ALUMINATE; CEMENT;

D O I：

10.1016/j.ceramint.2012.01.031

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The hydraulic properties of the Ca7ZrAl6O18 (C(7)A(3)Z) phase as well as the hydration products and thermal decomposition mechanism of this hydrated phase were studied. Microcalorimetric analysis has shown that the C(7)A(3)Z phase reacts with water very quickly, especially in the first 2 h after the start of the experiment. Hydration of calcium zirconium aluminate proceeds with the formation of high refractory calcium zirconate (with melting point 2345 degrees C), apart from the hydrated, nearly amorphous material. According to the DTA-TG-EGA, FT-IR and SEM/EDS examinations it has been found that not only the hydrates CAH(10), C(2)AH(8) and C(4)AH(19) are present, but also C(3)AH(6) (C = CaO, A = Al2O3, H = H2O), the only hydrated calcium aluminate which is a thermodynamically stable phase above 40 degrees C. Unhydrated Ca7ZrAl6O18 and CaZrO3 phases have been found by XRD, but crystalline hydrates have not been detected. (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：3821 / 3827

页数：7

共 17 条

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[2]

Berezhnoi A.S., 1963, DOPOV AKAD NAUK UKR, V10, P1344

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