DEVITRIFICATION OF ND3+-DOPED GLASSES IN THE AKERMANITE-GEHLENITE SYSTEM

被引：4

作者：

MALECKI, A ^{[1
]}

LEJUS, AM ^{[1
]}

VIANA, B ^{[1
]}

VIVIEN, D ^{[1
]}

COLLONGUES, R ^{[1
]}

机构：

[1] ECOLE NATL SUPER CHIM,F-75231 PARIS,FRANCE

来源：

JOURNAL OF THERMAL ANALYSIS | 1995年 / 44卷 / 02期

关键词：

AKERMANITE-GEHLENITE SYSTEM; DTA; KINETICS;

D O I：

10.1007/BF02636136

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The devitrification of glasses in the akermanite-gehlenite system [(C(2)Al(2-2y)Mg(y)Si1+O-y(7) (0 less than or equal to y less than or equal to 1)] doped with Nd3+ (2% mol) has been studied. DTA was used to determine the kinetics of the process. The Avrami law alpha=1-exp(-kl(n)) with n=1 was found to hold for doped gehlenite. For pure gehlenite, parameter n was determined to be 1.5. The activation energy of the devitrification process is independent of the presence of neodymium, and it is of the same order of magnitude as that for the viscous flow in molten silicates (ca. 650-750 kJ . mol(-1).

引用

页码：461 / 472

页数：12

共 22 条

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