| 摘要 |
<p>The submitted invention refers to ceramic ferrite materials, which are in combination with various saturated and non-saturated organic components the basis for producing foils of 10 micro to 10 mm by applying the technology of foil pouring, aimed at absorbing electromagnetic ripple within the frequency range of up to 12 GHz, measured at the toroid ferrite core, cut from ferrite foil of 100 x 100 x 3 mm and 7 mm external diameter, 3 mm internal diameter and 3 mm height from iron, zinc, nickel, manganese, copper, bismuth, cobalt oxides and barium carbonate with typical contents expressed in mole percentage of: Fe2O3 = 50 - 90 mol %; NiO = 15 - 50 mol %; ZnO = 0 - 35 mol %; CuO = 0 - 25 mol %; Bi2O3 = 0 - 10 mol %; CoO = 0 - 20 mol %; BaCO3 = 0 - 30 mol %; MnO = 15 - 35 mol %. The final electromagnetic properties are determined by the share of basic components of oxide materials and carbonates, the corresponding production conditions of the ceramic ferrite powder as well as the condition upon high-temperature sintering. The ceramic ferrite powder for the production of foil absorbers of electromagnetic ripple within the frequency range of up to 12 GHz produced in various shapes and thickness of thin-layer foils absorbs the electromagnetic ripple within the range of ferromagnetic resonance. The ceramic ferrite type of materials for the production of foil absorbers by applying the technology of foil pouring represent a strategic material for the application in new generation telecommunication technologies, for the protection against interference between various telecommunication systems as well as protection of people and residential areas against unwanted and health-hazardous electromagnetic ripple.</p> |
