Microwave absorption performance of PDCs-SiCN(Fe) ceramics with negative imaginary permeability
Source abstract
Abstract
Abstract PDCs-SiCN(Fe) ceramics were successfully fabricated with different content of ferric acetylacetonate (FA) by polymer-derived method. The effects of FA on the phase composition, microstructure, resistivity, dielectric properties, magnetic properties and microwave absorption properties of PDCs-SiCN(Fe) ceramics in the range of 2–18 GHz were investigated. The samples presented amorphous structure with a few crystalline phases of α-Fe and free carbon in the gaps, which were expected to be good soft magnetic materials. The average real permittivity and imaginary permittivity of PDCs-SiCN(Fe) ceramics with 50 wt% FA was about 14.1 and 5.3 respectively. Furthermore, the PDCs-SiCN(Fe) ceramics with 50 wt% FA addition content showed the broad absorption bandwidth in the 5.1–8.4 GHz with RL ≤ −10 dB (> 90% absorption) at 4 mm.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electromagnetic wave absorption materials · Advanced Antenna and Metasurface Technologies · Metamaterials and Metasurfaces Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (19)
Show source-provided references
1. Polymer-derived SiCN and SiOC ceramics–structure and energetics at the nanoscale10.1039/c2ta00727d ↗
2. Characterization of nanodomains in polymer-derived SiCN ceramics employing multiple techniques10.1111/j.1551-2916.2004.00034.x ↗
3. Structure and electronic transport properties of Si-(B)-C-N ceramics10.1111/j.1151-2916.2001.tb00999.x ↗
4. Thermal decomposition of carbon-rich polymer-derived silicon carbonitrides leading to ceramics with high specific surface area and tunable micro- and mesoporosity10.1016/j.jeurceramsoc.2011.08.020 ↗
5. Shaped ceramics with tunable magnetic properties from metal-containing polymers10.1126/science.287.5457.1460 ↗
6. Processing and magnetic properties of metal-containing SiCN ceramic micro- and nano-composites10.1007/s10853-007-2143-3 ↗
7. Single-source-precursor synthesis of soft magnetic Fe3Si- and Fe5Si3-containing SiOC ceramic nanocomposites10.1016/j.jeurceramsoc.2013.04.005 ↗
8. Preparation of Si-C-N-Fe magnetic ceramic derived from iron-modified polysilazane10.1016/j.ceramint.2012.05.080 ↗
9. Dielectric properties of SiC fiber-reinforced SiC matrix composites in the temperature range from 25 to 700 °C at frequencies between 8.2 and 18 and GHz10.1016/j.jnucmat.2012.08.026 ↗
10. Cross-linking behavior and dielectric properties of SiCN precursor10.1016/j.ceramint.2017.09.086 ↗
11. Wave absorbing performance of polymer-derived SiCN(Fe) ceramics10.1016/j.ceramint.2017.08.106 ↗
12. Electromagnetic and wave absorbing properties of Fe-doped polymer-derived SiCN ceramics10.1039/C7RA09399C ↗
13. Exchange resonance modes in ferromagnetic sphere10.1063/1.347502 ↗
14. Preparation of Si–C–N–Fe magnetic ceramic derived from iron-modified polysilazane10.1016/j.ceramint.2012.05.080 ↗
15. X. Guo, Y.R. Feng, X. Lin, Y. Liu, H.Y. Gong, Y.J. Zhang, The dielectric and microwave absorption properties of polymer-derived SiCN ceramics, J. Eur. Ceram. Soc. 〈https://dx.doi.org//10.1016/j.jeurceramsoc.2017.10.031〉.
16. Kao · 2004
17. Negative imaginary parts of complex permeability and microwave absorption performance of core double-shelled FeCo/C/Fe2.5Cr0.5Se4 nanocomposites10.1039/C6RA12772J ↗
18. Broadband microwave absorption of CoNi@C nanocapsules enhanced by dual dielectric relaxation and multiple magnetic resonances10.1063/1.4809675 ↗
19. Dielectric properties of Si3N4–SiCN composite ceramics in X-band10.1016/j.ceramint.2012.03.045 ↗