Construction of TiO2 nanointerfaces in Yb2Si2O7 ceramics with adjustable electromagnetic wave absorption and high-temperature stability

Lu Tang, Siyu Chen, Ying Li, Donghong Wang, Zhiyong Chen, Yi Zuo, Sifan Zong, Jimei Xue, Zhijun Wang, Hanjun Wei

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Due to the poor electromagnetic (EM) wave attenuation capability and relatively large bandgap of rare-earth silicate materials, their application as EM wave attenuation materials is adversely affected. In this work, TiO2 was deposited onto the surface of porous Yb2Si2O7 using a precipitation process followed by calcination. A transition from TiO2 nanorods to nanowires resulted in a flower-like three-dimensional (3D) network structure, effectively modulating the dielectric and EM wave-absorbing properties. The TiO2/Yb2Si2O7 ceramic (YT-3 sample) with a TiO2 nanowire content of 20.1 wt% achieved a minimum reflection loss (RLmin) of −21.1 dB at 2.3 mm and an effective absorption bandwidth (EAB) of 2.6 GHz at a thickness of 2.5 mm. Furthermore, the EAB fully covered the X-band at thickness ranging from 2.0 to 4.10 mm. The radar cross-section of the YT-3 sample significantly decreased by 21.5 dBm2. This improvement likely attributed to the 3D porous structure formed by the TiO2 nanowires, which improved the impedance matching and electrical conductivity while increasing both homogeneous interfaces and heterointerfaces. This enhancement facilitated electron transfer and hopping, amplified polarization and conduction losses and promoted multiple EM wave reflections and scattering. Additionally, the weight variation of the YT-3 sample was <0.48 % in the range of 25–1400 °C, demonstrating excellent high-temperature stability. These results advances to the development of Yb2Si2O7-based wave-absorbing materials for achieving effective EM wave absorption in high-temperature environments.

Original languageEnglish
Pages (from-to)8690-8698
Number of pages9
JournalCeramics International
Volume51
Issue number7
DOIs
StatePublished - Mar 2025

Keywords

  • EM wave absorption
  • Flower-like 3D network structure
  • High-temperature stability
  • Interfaces
  • TiO/YbSiO ceramic

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