Space charge measurement using pulsed electroacoustic technique and signalrecovery

Citation
A. Vazquez et al., Space charge measurement using pulsed electroacoustic technique and signalrecovery, J EUR CERAM, 19(6-7), 1999, pp. 1219-1222
Citations number
9
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
ISSN journal
09552219 → ACNP
Volume
19
Issue
6-7
Year of publication
1999
Pages
1219 - 1222
Database
ISI
SICI code
0955-2219(1999)19:6-7<1219:SCMUPE>2.0.ZU;2-V
Abstract
A recurrent problem in high-voltage engineering is the measurement of the e lectric stress inside a solid dielectric subjected to high voltages. The el ectric stress distribution can be modified if space charge is present in th e dielectric. The space charge can modify the local electric stress that ma y have an effect on the performance of the material. Therefore, the design, longevity, and performance of dielectrics, used as either electrets or ins ulators, depend on the space charge and the electric stress within them. He re a non-destructive experimental technique is considered which gives space charge and electric stress distributions inside dielectric samples by usin g acoustic pulses. However, it is realised that the technique does not give a true representation of the space charge when dispersive materials are co nsidered. This paper presents a frequency domain algorithm giving an accura te space charge distribution enabling the method to be applied to either di spersive ol non-dispersive dielectric materials. (C) 1999 Elsevier Science Limited. All rights reserved.