Abstract

Aluminum — anodic aluminum oxide electret systems prepared under widely varying oxidation conditions are studied in the present work by the methods of thermodepolarization analysis in combination with oxide partitioning. Energy spectra of polarization oxide state, volumetric charge distribution with the oxide thickness, total and partial charges transferred by the thermostimulated depolarization current, and the charge distribution with the activation energy of the thermostimulated depolarization current are examined. Contributions of the dipole relaxation and volumetric charge polarization decays to the total charge transferred by the thermostimulated depolarization current and the fundamental role of the negative volumetric charge in the formation and relaxation of the electret aluminum oxide state are discussed.

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