Broad microwave absorption bandwidth achieved by exchange coupling interaction between hard and soft magnetic materials. Issue 2 (15th January 2021)

• Record Type: Journal Article
• Authors: Fang, Gang; Liu, Chuyang; Yang, Yun; Peng, Kangsen; Xu, Guoyue; Zhang, Yujing
• Is Part Of: Ceramics international. Volume 47:Issue 2(2021)
• Page Start: 2879
• Page End: 2883
• Publication Date: 2021-01-15
• Subjects: Hard/soft composite -- Heat treatment -- Exchange coupling interaction -- Magnetic loss range -- Microwave absorption; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.09.011
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: To gain broad microwave absorption bandwidth over 2–18 GHz, hard/soft magnetic composites Ba(Zr–Ni)0.6 Fe10 · 8 O19 /Fe3 O4 have been synthesized in this work. The results show that the raising heat treatment temperature would cause more Fe3 O4 particles attach to Ba(Zr–Ni)0.6 Fe10 · 8 O19 particles, increasing the number of interfaces between Ba(Zr–Ni)0.6 Fe10 · 8 O19 and Fe3 O4 to enhance the hard/soft exchange coupling effect. Finally, the sample heat treated at 400 °C possesses the widest magnetic loss range (μ″>0.2) of 12.4 GHz, which contributes to a broad effective absorbing bandwidth of 6.68 GHz at 1.9 mm. The performance is superior than most of the state-of-the-art microwave absorbers.