METALLIC MICROWIRES FOR ELECTROMAGNETIC SCREENING CLOTH

摘要

The invention relates to some ferromagnetic wires and some non-magnetic electrically conductive microwires lined with a glass jacket, having lengths of up to 10 km, of which there are made combined electromagnetic screening cloths intended to be applied in various fields exposed to electromagnetic radiations, such as nautical, energetics, military field and the like. According to the invention, the microwires have a core made of electrically conductive materials, such as Cu, Ag, Al, Zn, Pb and Sn or a core of alloys with ferromagnetic properties, of the following types: FeNiy where x = 13...30 at%, y = 70...87 at%; FexCoy where x = 38...72 at%, y = 62...28 at% with Cr, Ni, Mo and V admixtures of up to 5 at%; FexSiyB(100-x-y) where x = 77...79 at%, y = 8...10 at% and CotFe(100-t-u-v-w-z) CruMnvSiwBz where t = 80...82 at%, u = 3...4 at%, v = 0.8...1.3 at%, w = 4.5...6.5 at%, z = 0.025...0.035 at%, said microwires being intended to be used in the temperature range between -80...+270°C and exhibiting a saturation magnetic induction Bs = 0.2...2.2 T, a coercive field Hc = 1...6000 A/m and a magnetic permeability in the rangeμ= 100...165000, the metal core of the microwires having a diameter ranging between 1...50μm and a 1...20μm-thick glass insulating layer.