Formation of celsian from mechanically activated BaCO3-Al2O3-SiO2 mixtures

被引：0

作者：

Bošković, S. ^{[1
]}

Kosanović, D. ^{[2
]}

Bahloul-Hourlier, Dj. ^{[3
]}

Thomas, P. ^{[3
]}

Kiss, S.J. ^{[1
]}

机构：

[1] Inst. of Nucl. Sci. - Vinča, Material Science Laboratory, POB 522, 11001 Belgrade, Yugoslavia

[2] Refractory Inst. Magnohrom-Kraljevo, Kraljevo, Yugoslavia

[3] Lab. Ceram. Mat. and Surf. Treatm., University of Limoges, Limoges, France

来源：

Journal of Alloys and Compounds | 1999年 / 290卷

关键词：

Alumina - Barium compounds - Heat treatment - Reaction kinetics - Silica - Thermogravimetric analysis - X ray diffraction analysis;

D O I：

暂无

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学科分类号：

摘要：

A ternary mixture BaCO3-Al2O3-SiO2 was mechanically activated for different lengths of time. Chemical composition of the mixture corresponded to BaAl2Si2O8-BAS. As a function of activation time, reaction course was followed in the temperature range 750-1200 °C. Reaction of celsian formation was followed using thermogravimetry as well as conventional and high-temperature X-ray diffractometry. The obtained data show that reaction rate increases with prolonged activation time, under the same conditions of thermal treatment. Formation of hexacelsian via a series of solid state reactions involving Ba-silicates, was favoured with increasing activation time. Direct formation of monoclinic celsian was retarded, however, with prolonged activation.

引用

页码：230 / 235