
Accession Number : AD0259445
Title : Shape of the Current Output Pulse from a Thin Ferroelectric Cylinder under Shock Compression
Corporate Author : HARRY DIAMOND LABS ADELPHI MD
Personal Author(s) : Wittekindt, R H
PDF Url : AD0259445
Report Date : 15 May 1961
Pagination or Media Count : 59
Abstract : When a polarized ferroelectric element is traversed by a shock front that destroys the polarization, a current output appears. The shape of the curve of this current output versus time is computed in a normalized and general form for the case where the shock front moves in a direction normal (or approximately normal) to the electrodes and parallel to the polarization. The influence of the external electric load, of the dielectric constants and the hysteresis, of a conductivity in the compressed material, and of an oblique impact is discussed. The condition for maximum energy output also is discussed. Mathematical expressions for the current output are given for the various conditions, examples are calculated and shown in graphs. Methods are described for evaluating the dielectric constant in the compressed material from measured output curves.
Descriptors : *FERROELECTRICITY, DIELECTRICS, DIFFERENTIAL EQUATIONS, ELECTRICAL CONDUCTIVITY, HYSTERESIS, INTEGRAL EQUATIONS, MATHEMATICAL ANALYSIS, POLARIZATION, SHOCK WAVES, THEORY, TRANSDUCERS
Subject Categories : Electricity and Magnetism
Distribution Statement : APPROVED FOR PUBLIC RELEASE