A study of the electret properties of Carnauba Wax

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  • Carnauba wax electrets were made by electrification with high fields below the melting point of the wax. Measurements were made of the discharge current of an electret and the torque on an electret in an electric field. A torsion balance was constructed to measure the torque. Experiments were conducted both with natural wax and with wax that had been treated to remove impurities.It was found that for an electret of natural wax the discharge current fell off with time after removal of the forming field; the magnitude of the current being approximately inversely proportional to the time since the field was removed.The torque on such an electret rises from zero with time, the magnitude being given by T = c(1 - i/t) where c is a constant and t is the time since the forming field was removed. Removal of occluded water changes the functions for the decay of discharge current and rise in torque to exponentials. Thorough filtering and an attempt at removal of ionic impurities increased the final value of the torque.The results are in agreement with the theory proposed by B. Gross.

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  • Copyright ¬© 1962 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
Date Created
  • 1962


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