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Electrical Characterization
Electrical Characterization is performed using a variety of temperature chambers, LCR meters, impedance analyzers, pA meters, DMMs, charge converters, lock-in amplifiers, dynamic signal analyzers, voltage amplifiers, and sample fixturing for bulks, films, and leaded samples.
Electrical properties such as conductivity and dielectric constant can be used for Geomaterial Characterization.
Parameters influencing Electrical Properties of Geomaterials
Porosity and the pore structure
Water content
Salinity level
Cation exchange capacity of the soil
Temperature
Type and Frequency of the current
Electrical Conductivity and Dielectric Constant
Electrical Conductivity is a measure of charge mobility in response to an electric field.
Dielectric Constant is a measure of the capacity of a material to reduce the strength of an electric energy field and to behave like an insulator.
Electrical Properties of Geomaterials
Electrical Conduction in moist Geomaterials occurs as a result of the movement of ions.
These materials are characterized by polarization.
However, they behave neither as a conducting material nor as a perfectly dielectric material, and hence they can be modeled as a ‘Lossy Dielectric Material’.
A frequency-dependent complex permittivity is used to capture both amplitude and phase information.