Enhanced Microwave Absorbing Capabilities of Multilayer Absorbers Based on BaFe₁₂O₁₉ and Fe₃O₄

Abstract:

In order to enhance a new microwave absorbing capabilities in the X-band frequency range, polycrystalline magnetic materials of BaFe₁₂O₁₉ barium hexaferrite were fabricated through conventional ceramic method and the Fe₃O₄ powder from iron sand were prepared through magnetic separation after milling process by using planetary ball mill. Microwave absorbing capabilities of multilayer absorbers, composed of BaFe₁₂O₁₉ barium hexaferrite and the Fe₃O₄ powder, with a total thickness of 10 mm, were investigated by a vector network analyzer (VNA) in the range of 8.2 –12.4 GHz. According to transmission line theory, reflection of microwave radiations from multilayer magnetic materials is calculated. The reflection loss (RL) strongly depends on thickness of multilayer absorbers and showed an optimal RL. Keywords : BaFe₁₂O₁₉, Fe₃O₄ powder, reflection loss, multilayer absorbers.

• Periodical: Materials Science Forum (Volume 966)
• Pages: 338-343
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.966.338
• Online since: August 2019
• Authors: Erfan Handoko*, Iwan Sugihartono, Mangasi Alion Marpaung, Ucu Cahyana, Sovian Aritonang, Zulkarnain Jalil, Rusmono Rusmono, Ahmad Taufiq, Sunaryono Sunaryono, Mudrik Alaydrus
• Keywords: BaFe₁₂O₁₉ (BFO), Fe₃O₄ Powder, Multilayer Absorbers, Reflection Loss

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