EFFECT OF DEGRADATION OF MONTMORILLONITE BY VIBRATION GRINDING ON THE DTA CURVES IN THE RANGE 20-1500-DEGREES-C

被引：12

作者：

FAJNOR, VS

KUCHTA, L

机构：

[1] Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, Bratislava, 842 15, Mlynská Dolina

来源：

JOURNAL OF THERMAL ANALYSIS | 1995年 / 45卷 / 03期

关键词：

DIFFERENTIAL THERMAL ANALYSIS; HIGH-TEMPERATURE PHASES; MONTMORILLONITE; VIBRATION GRINDING;

D O I：

10.1007/BF02548780

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The effect of vibration grinding on the DTA curves of montmorillonite isolated from the most important locality of bentonite in the Slovak Republic (Jelsovy potok, Middle Slovakia) was studied in the temperature range 20-1500 degrees C. Interpretation is offered for 6 endothermic and 3 exothermic peaks. vibration grinding modified the course of dehydration of the mineral, suppresses the 'dehydroxylation' peak at 700 degrees C, enables the crystallization of high-temperature quartz, cristobalite and cordierite at lower temperatures in comparison with unground natural montmorillonite. Vibration grinding slows down the crystallization of mullite which - unlike quartz, cristobalite and cordierite - does not belong to high-temperature phases of Cheto-montmorillonite. The order in which these high-temperature phases occur is not influenced by vibration grinding.

引用

页码：481 / 489

页数：9

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