The dielectric properties of some homogeneous materials at high electric stress
- 1 October 1945
- journal article
- Published by Institution of Engineering and Technology (IET) in Journal of the Institution of Electrical Engineers - Part I: General
- Vol. 92 (58) , 373-377
- https://doi.org/10.1049/ji-1.1945.0097
Abstract
Specimen-electrode systems suitable for measurements at high stress are considered, and the stresses estimated for which they are suitable.Measurements at 50 c/s on mica, polystyrene and phenol formaldehyde up to stresses of the order of 106 V/cm, approximately equal to one-fifth of the intrinsic electric strengths, show that the changes of phase angle, if any, do not exceed 0.0005 With phenol formaldehyde an increase of capacitance of 2.5 parts in 1 000 was observed.Keywords
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