Title :
Modelling of the dielectric response of materials containing mobile charges
Author :
Given, M.J. ; Fouracre, R.A. ; Crichton, B.H.
Author_Institution :
Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK
Abstract :
The authors report the preliminary results of computer simulations designed to model the response of a dielectric containing mobile charge to an applied alternating voltage. The models are more physically realistic versions of one proposed by F. Sterne and C. Weaver (J. Phys. C., vol.3, p.1736-46, 1970). It is shown that the assumptions made in the Sterne-Weaver model affect the calculated values of permittivity. Contrary to Sterne-Weaver, it is shown that it is not possible to approximate a system containing two mobile ionic species of opposite polarity by only allowing one of the species to migrate under the influence of the applied electric field; nor can diffusive effects be ignored as they can produce a major modification to the distribution of the ionic species. As the frequency of the applied electric field is increased the influence of the diffusive effects will become less marked
Keywords :
dielectric polarisation; digital simulation; permittivity; physics computing; Sterne-Weaver model; applied alternating voltage; computer simulations; dielectric response; diffusive effects; ionic species; mobile charges; permittivity; Charge carriers; Computer simulation; Dielectric materials; Electrodes; Frequency; Nonlinear equations; Polarization; Slabs; Temperature; Voltage;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of
Conference_Location :
Beijing
DOI :
10.1109/ICPADM.1988.38448
