Accession Number : AD0831956

Title :   DIELECTRIC FOR HIGH ENERGY STORAGE CAPACITORS.

Descriptive Note : Final rept. 23 Jun 66-30 Sep 67,

Corporate Author : SPRAGUE ELECTRIC CO NORTH ADAMS MA

Personal Author(s) : Anderson, H. U. ; Frantz, F. ; Tompkins, C.

Report Date : OCT 1967

Pagination or Media Count : 63

Abstract : The dielectric constant of a polymer film is proportionately increased by the amount of BaTiO3 powder incorporated into the polymer prior to casting. However, this increase in dielectric constant is accompanied by a proportionate decrease in dielectric strength. Films were cast from different polymers containing up to 40 volume percent BaTiO3 powder. The best loaded film was 20 volume percent BaTiO3 in Polycarbonate 2 polymer. Its dielectric strength was considered high enough for high energy storage applications and, consequently, single-layer capacitors were fabricated for testing. The dielectric strengths of the other films were generally too low for use in high energy storage capacitors. The cause of the decrease in dielectric strength of loaded films, the various methods for increasing the dielectric strength of the films, and the need for more information regarding both the characteristics of BaTiO3 surfaces and the dispersion behavior of BaTiO3 in polymers are discussed.

Descriptors :   (*CAPACITORS, DIELECTRICS), POLYMERS, FILMS, DIELECTRIC PROPERTIES, BARIUM COMPOUNDS, TITANATES, SOLVENTS, FERROELECTRIC MATERIALS, DEGRADATION, POWDERS, NEUTRALIZATION, STYRENE PLASTICS, ENERGY, STORAGE, CARBONATES, POLYMERS.

Subject Categories : Electrical and Electronic Equipment
      Miscellaneous Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE