Title

Improved Conductivity Measurements of Highly Disordered Insulating Materials

Document Type

Presentation

Journal/Book Title/Conference

USU Student Showcase

Publication Date

4-2014

Faculty Mentor

JR Dennison

Abstract

Measurements of the time-dependent conductivity for highly disordered insulating materials have been enhanced using a stable high-voltage battery power supply. The resulting decrease of the error in conductivity measurements has allowed tests of "extremely resistive materials--where migration of charge layers across 10-5 m thick samples can take decades and better determination of physics-based fitting parameters. The data were analyzed using various curve fitting techniques to the model the complete time-dependent conductivity curves. The fits were also used to predict the time for a sample to reach conductive equilibrium and the amount of time required for a sample to completely discharge after it had been fully charged. Additional studies will assess the conductive properties of a variety of highly resistive materials used in spacecraft design.

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