GEL SYNTHESIS AND CRYSTALLIZATION OF LI2O.7GEO2 GLASS POWDERS

被引：4

作者：

ARONNE, A

CATAURO, M

PERNICE, P

MAROTTA, A

机构：

来源：

THERMOCHIMICA ACTA | 1993年 / 216卷

关键词：

D O I：

10.1016/0040-6031(93)80390-V

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Li2O . 7GeO2 gel was synthesized by the hydrolytic polycondensation reactions of germanium ethoxide with lithium methoxide. The crystallization behaviour of the gel, examined by differential thermal analysis and X-ray diffraction, is reported and discussed. Lithium heptagermanate gel was found to crystallize in two steps. In the primary transformation, microcrystallites of Li2Ge7O15 are crystallized in an amorphous matrix. In the second transformation, well-shaped Li2Ge7O15 crystals are formed. The activation energy values for the two stages are found to be 589 and 495 kJ mol-1, respectively. The results are compared with those obtained for conventional lithium heptagermanate glass.

引用

页码：169 / 176

页数：8

共 5 条

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