| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Powder and Ceramic Materials Science
|
| Presentation Title |
Microwave Absorption Properties of Polymer-derived SiCN(Fe)/Si3N4 Ceramics |
| Author(s) |
Xiao Lin, Hongyu Gong, Yujun Zhang, Jianqiang Bi, Yurun Feng, Shan Wang |
| On-Site Speaker (Planned) |
Hongyu Gong |
| Abstract Scope |
Iron-doped SiCN/Si3N4 ceramics were synthesized by dipping-pyrolysis polysilazane with iron(III) acetylacetonate and use porous silicon nitride as matrix. The polysilazane pyrolyzed a certain amount of free carbon and silicon nitride at the high temperature. The content of iron increased with the increase of the amount of iron(III) acetylacetonate addition. When the sample was added with 5wt.% iron(III) acetylacetone, the ε' reached the lowest value of 1 at 15.4 GHz, the highest peak value of the tan ε was 3.09 at 15.2 GHz, and the R of the sample was lower than -20 dB at 15.5 GHz, which implied that it has great wave absorption performance in the high frequency region and could absorb more than 99% of the incident electromagnetic waves. The uniform distribution of C, β-SiC and α-Fe in the samples is helpful to improve the wave absorption properties of the materials. |
| Proceedings Inclusion? |
Planned: |