ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 37, (4) 187 - 192 (1993)


CHANGES IN SURFACE OF DRY ACTIVATED QUARTZ AND MAGNESITE POWDERS DURING DYNAMIC AND STATIC CONTACTS WITH LIQUID ENVIRONMENTS OF VARIOUS POLARITY
 
Števulová Nadežda, Tkáčová Klára
 
Institute of Geotechnique, Slovak Academy of Sciences, Watsonova 45, 043 53 Košice

The influence of liquid environments of various polarity on the metastable states formed during dry grinding of quartz and magnesite have been investigated. The X-ray amorphous phase content and the excess enthalpy accumulated during energy intensive dry grinding remain unaffected during short-termed dispergation regrinding as well as during long-termed stirring and static storage of the activated powders in liquid environment. The changes in specific surface area depend upon: the permitivity of liquid environment, crystallochemical properties of the activated powder and conditions of their mutual contact.


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