DETERMINATION OF THE DIELECTRIC CONSTANT AND THE LOSS FACTOR OF FOAM-BASE DIELECTRICS,
Abstract
The article applies the logarithmic mixing law to the case of composite dielectrics consisting of synthetic resins or ceramics and trapped air pockets. Formulae are derived for both the dielectric constant and the loss factor tan delta of such foambase materials. Numerical values are obtained by measurement and comparing foamy samples with solid ones made of the same materials in the same shape. The actual values thus determined, i.e. by weighting, are tabulated for eight groups of dielectric compounds (Polyethylenes, polyvinylbutyrales, hard polyurethanes, silicones, polystyroles, epoxies, phenols and cellulose acetate). The data are taken from several sources; variations are attributed to water content, manufacturing processes and storage.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 13, 1967
- Accession Number
- AD0824799
Entities
People
- L. Graessler
Organizations
- National Air and Space Intelligence Center