Optimization of electromagnetic matching of Ba1-xCaxFe11.4Co0.6O19 (0.2 ≤ x ≤ 0.8) ceramics for microwave absorption within 2.6–18 GHz

Gangli Feng, Wancheng Zhou, Yiwen Li, Fa Luo, Dongmei Zhu, Zhibin Huang, Yingying Zhou, Yuchang Qing

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The Ba1-xCaxFe11.4Co0.6O19 (x = 0.0, 0.2, 0.4, 0.6, and 0.8) composites with wide-bandwidth and good absorption performance were prepared. The MS of ceramics increases from about 62.4 to 83.4 emu g−1 as x rises from 0 to 0.6, which demonstrates that the desirable magnetic properties of such ceramics is obtained by adjusting the content of Ca2+. A bandwidth of reflection loss (RL) below - 5 dB can be obtained for frequencies from 5.9 to 18 GHz with the Ba0.4Ca0.6Fe11.4Co0.6O19 ceramic and a thickness of 2.0 mm, and a larger RL value of −34.1 dB is observed at 8.2 GHz for the Ba0.6Ca0.4Fe11.4Co0.6O19 ceramic. These results suggest the developed ceramics could act as effective and wide-bandwidth microwave absorbing materials to meet commercial and military applications.

Original languageEnglish
Pages (from-to)13102-13106
Number of pages5
JournalCeramics International
Volume46
Issue number9
DOIs
StatePublished - 15 Jun 2020

Keywords

  • Calcium-based substitution
  • Microwave absorption
  • Reflection loss
  • Wide-bandwidth absorption

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