Accession Number : AD0697117

Title :   ELECTRICAL IMPEDANCE OF ALUMINUM SURFACE OXIDE,

Corporate Author : BOEING SCIENTIFIC RESEARCH LABS SEATTLE WASH

Personal Author(s) : Smith,Alan W. ; Pollock,Ann

Report Date : SEP 1969

Pagination or Media Count : 32

Abstract : The impedance of surface oxides, present after etching or other treatment of aluminum, is shown to be characteristic of that of amorphous dielectrics with a frequency independent dielectric loss. Results with both electrolytic solution contacts and evaporated metal contacts indicate a thin barrier layer covered by a thicker permeable layer as occurs on a porous, anodized surface. Methods for determining the dielectric constant and the roughness are developed. The dielectric loss is related to hydration of the surface. (Author)

Descriptors :   (*ANODIC COATINGS, ELECTRICAL IMPEDANCE), ALUMINUM, DIELECTRIC FILMS, DIELECTRIC PROPERTIES, OXIDES, SURFACE ROUGHNESS

Subject Categories : Coatings, Colorants and Finishes

Distribution Statement : APPROVED FOR PUBLIC RELEASE