Novel Sr4Fe6O13 ferrites and Sr4Fe6O13/CNTs composites for 15 GHz high frequency microwave absorption application.

Sr₄Fe₆O₁₃ ferrites as a new kind of high frequency microwave absorption materials were synthesized by solid-state method, and its high frequency microwave absorption performances were investigated. The carbon nanotubes (CNTs) were added into Sr₄Fe₆O₁₃ ferrites to form Sr₄Fe₆O₁₃/CNTs composites with network structure, which improved the high-frequency dielectric performance and microwave absorption capacity. When the mass ratio of Sr₄Fe₆O₁₃ and CNTs was 20, the Sr₄Fe₆O₁₃/CNTs composites achieved the strongest absorption capacity (− 51 dB) at frequency of 15 GHz with 1.2 mm thickness. Those results indicate that Sr₄Fe₆O₁₃/CNTs composites are suitable potential application to high-frequency communication device in suppressing electromagnetic interference. [ABSTRACT FROM AUTHOR]