What is it about?
The dielectric responses of granular systems under varied compressive loadings consistently exhibit a transition from a resistive plateau at low frequencies to a state of nearly constant loss at high frequencies. By using characteristic frequencies corresponding to the onset of conductance dispersion and measured direct-current resistance as scaling parameters to normalize the measured impedance, results of the spectra under different stress states collapse onto a single master curve, revealing well-defined stress-independent universality.
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Why is it important?
This frequency-dependent behaviour is of importance in diverse applications including material characterization battery optimization and sensors.
Perspectives
This work paves the way towards exciting new developments and understandings in heterogeneous energy systems.
Dr, Dorian Hanaor
Technische Universitat Berlin
Read the Original
This page is a summary of: Stress-dependent electrical transport and its universal scaling in granular materials, Extreme Mechanics Letters, July 2018, Elsevier,
DOI: 10.1016/j.eml.2018.05.005.
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