Continuous production of glass-coated microwires and the applications for broadband noise suppression composite sheets

A system and a method were developed for continuous production of glass-coated microwires with controllable glass thickness and metallic core diameter. Fe–Si–Al flakes were fabricated by planetary ball milling using ethanol as a dispersant. A composite noise suppression sheet was prepared with glass-coated microwires combined with Fe–Si–Al flakes. The characteristics of the conduction noise suppression of the composite sheet were evaluated on a microstrip line in gigahertz frequencies. The conduction electromagnetic noise was effectively suppressed by the composite sheet in broad-band frequency region; the power loss is greater than 70% in the frequency range from 0.7 to 8.5 GHz.

► System and method developed for producing glass-coated microwires.
► Noise suppression sheet prepared with microwires combined with Fe–Si–Al flakes.
► Power loss of noise suppression sheet greater than 70% for 0.7–8.5 GHz.