| 摘要 |
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 Fe2O3, Fe3O4, Fe3C, or Fe7C3. The shielding composition can be formed into a layer (500) or into composite particles (600). The binder (504) can be a metal or an electrically conducting polymer. A conducting layer (558) 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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