High-efficiency electromagnetic wave absorption of TiB2-SiCnws-SiOC synthesised using PDCs

Pei Feng, Hanjun Wei, Jimei Xue, Yuhua Shi, Peng Shang, Wenyuan Zhang, Sihai Luo, Xiaoqing Liang, Weifeng He

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A designed conductive nanoheterogeneous structure can boost interfacial polarisation and effectively enhance the wave absorption properties. Herein, maze-shaped nanoheterogeneous TiB2-SiCnws-SiOC ceramics were synthesised via a polymer-derived ceramics (PDCs) approach for constructing a three-dimensional reticular structure. The addition of TiB2 not only compensates for the lower conductivity, but also facilitates the growth of curved SiCnws. The results show that the addition of 20 wt% TiB2 leads to favourable microwave absorption performance, with a minimal reflection coefficient of − 55.1 dB at 8.9 GHz and an effective absorption bandwidth of 4.2 GHz. This can be ascribed to the synergistic effect among polarisation loss, conduction loss, and microwave multiple reflection and scattering due to the unique structure. This study may contribute towards establishing multi-loss mechanisms and controllable dielectric properties in PDCs.

Original languageEnglish
Pages (from-to)5207-5213
Number of pages7
JournalJournal of the European Ceramic Society
Volume43
Issue number12
DOIs
StatePublished - Sep 2023

Keywords

  • Maze-shaped nanoheterogeneous
  • Microwave absorption properties
  • Polymer-derived ceramics
  • TiB-SiCnws-SiOC ceramics

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