NDLI: Permittivity and AC conductivity measurement of hydrated phyllosilicate minerals

Content Provider	IEEE Xplore Digital Library
Author	Dos Anjos, I.F. Barbin, S.E.
Copyright Year	2015
Description	Author affiliation: Univ. of Sao Paulo, Sao Paulo, Brazil (Barbin, S.E.) \|\| UFPB-Fed. Univ. of Paraiba, Joao Pessoa, Brazil (Dos Anjos, I.F.)
Abstract	In the present study, the relationship between the AC conductivity, permittivity and loss of vermiculite is presented. The way that different materials react when an electromagnetic field is applied depends strongly on the materials' dielectric properties. In industrial processes that employ microwaves, it is important to know in advance the properties of the material to be processed in particular, its dielectric characteristics. Another important factor to be considered is the variation of the AC conductivity, which is strongly influenced by the behavior of the charge carriers with frequency, permittivity and loss tangent. The frequencies used in the study were 1.60 GHz, 1.80 GHz, 2.00 GHz and 2.45 GHz. The technique is based on the measured S-parameters, followed by a numerical determination through a $MATLAB^{®}$ code based on the Nicolson - Ross - Weir noniterative method. The study demonstrated that AC conductivity of vermiculite is dependent on the frequency and loss and that this dependency influences the exfoliation rate of vermiculite when exfoliated by microwave radiation.
Starting Page	1389
Ending Page	1391
File Size	222644
Page Count	3
File Format	PDF
e-ISBN	9781479978069
DOI	10.1109/ICEAA.2015.7297345
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-09-07
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	NRW method Permittivity measurement Phyllosilicate minerals Vermiculite S-parameters Conductivity Microwave theory and techniques Transmission line measurements ac conductivity Minerals Permittivity Electric fields
Content Type	Text
Resource Type	Article

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Permittivity and AC conductivity measurement of hydrated phyllosilicate minerals

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