Microwave absorber employing acicular magnetic metallic...

Details Microwave absorber employing acicular magnetic metallic... Microwave absorber employing acicular magnetic metallic...

C - Chemistry, Metallurgy

09

D

31/106

C09D 5/32 (2006.01) H01Q 17/00 (2006.01)

Patent

CA 2005198

MICROWAVE ABSORBER EMPLOYING ACICULAR MAGNETIC METALLIC FILAMENTS Abstract of the Disclosure An electromagnetic radiation absorber is formed by dispersing into a dielectric binder acicular magnetic metallic filaments with an average length of about 10 micron or less, diameters of 0.1 micron or more, and aspect (length/diameter) ratios between 10:1 and 50:1. Preferably the average length is about 5 micron, the aspect ratios are between 10:1 and 25:1, and the dielectric binder is polymeric. The volume fraction of the filaments may be lower than 35% of the total and still provide satisfactory absorption. An absorbing paint is formed by dissolving the absorber in a base liquid. The absorber or absorbing paint may be applied to a conductive surface, such as a metallic wire, plate or foil. Impedance matching materials are preferred but not required. PFAPP5.5

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