标题：Microwave Absorption Properties of Polymer-Derived SiCN(Fe)/Si3N4 Ceramics
作者：Lin, Xiao ;Gong, Hongyu ;Zhang, Yujun ;Bi, Jianqiang ;Feng, Yurun ;Wang, Shan
作者机构：[Lin, Xiao ;Gong, Hongyu ;Zhang, Yujun ;Bi, Jianqiang ;Feng, Yurun ;Wang, Shan ] Key Laboratory for Liquid-Solid Structural Evolution & Processing of 更多
会议名称：Symposium on Advances in Powder and Ceramic Material Science held at the 149th Annual Meeting and Exhibition, TMS 2020
会议日期：February 23, 2020 - February 27, 2020
来源：Minerals, Metals and Materials Series
摘要：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 in 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.
© 2020, The Minerals, Metals & Materials Society.