인문학
사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
The demand for thin and broadband high-frequency electromagnetic wave absorbers has grown rapidly with the advancement of communication technologies. However, most conventional magnetic materials exhibit ferromagnetic resonance (FMR) at low frequencies, restricting their applicability in high-frequency ranges such as the K-band, which is widely used in 5G communication. In this study, Ni-Co-substituted Ba-W hexaferrites (BaNi<sub>2-x</sub>Co<sub>x</sub>Fe<sub>16</sub>O<sub>27</sub>) were synthesized via a citric acid-assisted sol–gel method combined with molten salt calcination to achieve single-phase formation at a reduced temperature of 1250 °C. By adjusting the Ni and Co substitution levels, the FMR frequency was effectively tuned within the 18–40 GHz range. The composite absorber with the optimized composition, BaNi<sub>1.4</sub>Co<sub>0.6</sub>Fe<sub>16</sub>O<sub>27</sub>, exhibited over 90% absorption efficiency across the entire K-band with a minimal thickness of 1.2 mm. This absorber outperforms many previously reported materials by offering wider bandwidth and thinner thickness. These findings highlight the suitability of Ni-Co- substituted Ba-W hexaferrites for next-generation communications.
본문·목차
인공지능 문자 인식 모델을 통해 추출된 텍스트로, 일부 오타나 오류가 포함될 수 있으나 지속적으로 개선 중입니다.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
오류를 발견하셨다면 해당 부분을 드래그한 후 ' 를 통해 신고해주세요.
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