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Microwave Absorption Properties of Polymer-Derived SiCN(Fe)/Si3N4 Ceramics

  • Xiao Lin
  • Hongyu GongEmail author
  • Yujun Zhang
  • Jianqiang Bi
  • Yurun Feng
  • Shan Wang
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

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.

Keywords

Porous Si3N4 Iron(III) Acetylacetonate Polysilazane Dipping-pyrolysis Wave-absorbing properties 

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Copyright information

© The Minerals, Metals & Materials Society 2020

Authors and Affiliations

  • Xiao Lin
    • 1
    • 2
  • Hongyu Gong
    • 1
    • 2
    Email author
  • Yujun Zhang
    • 1
    • 2
  • Jianqiang Bi
    • 1
  • Yurun Feng
    • 1
    • 2
  • Shan Wang
    • 1
    • 2
  1. 1.Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials of Ministry of EducationShandong UniversityJinanChina
  2. 2.Key Laboratory of Special Functional Aggregated MaterialsMinistry of Education, Shandong UniversityJinanChina

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