METHOD OF THE SUBSTITUTED BARIUM HEXAFERRITE BASED ABSORBING MATERIAL PRODUCTION Russian patent published in 2018 - IPC C09D5/32 H01Q17/00 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to the production of absorbing electromagnetic radiation magnetically-dielectric materials, and can be used in radio electronic equipment in the production of receiving antennas, which perform selective radio absorption in the sub-terahertz range (0.09–0.1 THz). Material is produced by the substituted barium hexaferrite BaFe_12-xAl_xO₁₉ synthesis, where 0.5≤x≤2, from the Fe₂O₃, Al₂O₃ oxides and BaCO₃ carbonate with the low-melting eutectic dielectric layer application in the process of a single cycle of a solid-phase reaction due to the addition of B₂O₃ 1–2 wt% to the initial charge. Powders are subjected to wet grinding, after which the mixture is compacted and subjected to calcination in air at 1,150–1,250 °C until sintering, then slowly cooled down. Absorbent material producing method is simple, and the resulting material has absorption coefficients of -19.6…-22.7 dB and is effective for absorption in the sub-terahertz region of the spectrum (0.09–0.1 THz).

EFFECT: simplification of the absorbent material production method.

1 cl, 6 dwg, 3 ex