Electromagnetic shielding

Details Electromagnetic shielding Electromagnetic shielding

1997-10-31

1999-08-17

Kopec, Mark

Compositions

Electrically conductive or emissive compositions

252516, 2525181, 2525212, 1741262, 174 35R, 174 35MS, 428924, H01B 120, H01B 112, H05K 900

Patent

active

059389796

ABSTRACT:
Electromagnetic shielding material is formed from a shielding composition made with magnetic particles and a binder, where the magnetic particles have an average diameter less than about 1000 nm and are substantially crystalline. The magnetic particles can be formed from Fe.sub.2 O.sub.3, Fe.sub.3 O.sub.4, Fe.sub.3 C, or Fe.sub.7 C.sub.3. The shielding composition can be formed into a layer or into composite particles. The binder can be a metal or an electrically conducting polymer. A conducting layer can be placed adjacent to the shielding composition. The shielding material can be used to protect sensitive electronic devices. Methods are described for forming iron oxide particles by laser pyrolysis.

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