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Characterization of coals by the study of complex permittivity

โœ Scribed by Jean-Charles Giuntini; Jean-Victor Zanchetta; Sekou Diaby

Publisher
Elsevier Science
Year
1987
Tongue
English
Weight
621 KB
Volume
66
Category
Article
ISSN
0016-2361

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โœฆ Synopsis

In a study aimed at quantitative characterization of coals, the complex permittivity of non-demineralized coals was measured at variable frequency (5-10' Hz) and temperature (22%380 K). The results show that the polarization conductivity follows a law of the type G'(w)=A&. This shows that there is a hopping conductivity process between localized sites. These sites could be basic structural units (BSU) forming organized microdomains.

This work shows that the parameters calculated from the experimental results differ according to the origin of the coal.

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