Electromagnetic interference shielding properties of polymer derived SiC-Si3N4 composite ceramics

Xiaoling Liu; Xiaowei Yin; Wenyan Duan; Fang Ye; Xinliang Li

doi:10.1016/j.jmst.2019.07.006

Electromagnetic interference shielding properties of polymer derived SiC-Si₃N₄ composite ceramics

Xiaoling Liu, Xiaowei Yin, Wenyan Duan, Fang Ye, Xinliang Li

School of Materials Sience and Engineering

Research output: Contribution to journal › Article › peer-review

48 Scopus citations

Abstract

SiC-Si₃N₄ composite ceramics are successfully fabricated by pyrolysis of ferrocene-modified polycarbosilane (PCS) mixed with inert filler Si₃N₄ powders, followed by thermal treatment from 1100 °C to 1400 °C in Ar atmosphere. The porosity of SiC-Si₃N₄ ceramics decreases to 6.4% due to the addition of inert filler Si₃N₄. And the content and crystallization degree of free carbon and SiC derived from PCS are improved simultaneously with the increase of thermal treatment temperature. Finally, the free carbon and SiC interconnect, forming the conductive network. As a result, the electromagnetic interference (EMI) shielding performance of the as-prepared ceramic annealed at 1400 °C reaches up to 36 dB, meaning more than 99.9% of EM energy is shielded. The low porosity and high EMI shielding performance enable SiC-Si₃N₄ composite ceramics to be a promising electromagnetic shielding and structural material.

Original language	English
Pages (from-to)	2832-2839
Number of pages	8
Journal	Journal of Materials Science and Technology
Volume	35
Issue number	12
DOIs	https://doi.org/10.1016/j.jmst.2019.07.006
State	Published - Dec 2019

Keywords

Electromagnetic shielding properties
Inert filler
Polymer derived ceramics
SiC-SiN

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title = "Electromagnetic interference shielding properties of polymer derived SiC-Si3N4 composite ceramics",

abstract = "SiC-Si3N4 composite ceramics are successfully fabricated by pyrolysis of ferrocene-modified polycarbosilane (PCS) mixed with inert filler Si3N4 powders, followed by thermal treatment from 1100 °C to 1400 °C in Ar atmosphere. The porosity of SiC-Si3N4 ceramics decreases to 6.4% due to the addition of inert filler Si3N4. And the content and crystallization degree of free carbon and SiC derived from PCS are improved simultaneously with the increase of thermal treatment temperature. Finally, the free carbon and SiC interconnect, forming the conductive network. As a result, the electromagnetic interference (EMI) shielding performance of the as-prepared ceramic annealed at 1400 °C reaches up to 36 dB, meaning more than 99.9% of EM energy is shielded. The low porosity and high EMI shielding performance enable SiC-Si3N4 composite ceramics to be a promising electromagnetic shielding and structural material.",

keywords = "Electromagnetic shielding properties, Inert filler, Polymer derived ceramics, SiC-SiN",

author = "Xiaoling Liu and Xiaowei Yin and Wenyan Duan and Fang Ye and Xinliang Li",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = dec,

doi = "10.1016/j.jmst.2019.07.006",

language = "英语",

volume = "35",

pages = "2832--2839",

journal = "Journal of Materials Science and Technology",

issn = "1005-0302",

publisher = "Chinese Society of Metals",

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TY - JOUR

T1 - Electromagnetic interference shielding properties of polymer derived SiC-Si3N4 composite ceramics

AU - Liu, Xiaoling

AU - Yin, Xiaowei

AU - Duan, Wenyan

AU - Ye, Fang

AU - Li, Xinliang

PY - 2019/12

Y1 - 2019/12

N2 - SiC-Si3N4 composite ceramics are successfully fabricated by pyrolysis of ferrocene-modified polycarbosilane (PCS) mixed with inert filler Si3N4 powders, followed by thermal treatment from 1100 °C to 1400 °C in Ar atmosphere. The porosity of SiC-Si3N4 ceramics decreases to 6.4% due to the addition of inert filler Si3N4. And the content and crystallization degree of free carbon and SiC derived from PCS are improved simultaneously with the increase of thermal treatment temperature. Finally, the free carbon and SiC interconnect, forming the conductive network. As a result, the electromagnetic interference (EMI) shielding performance of the as-prepared ceramic annealed at 1400 °C reaches up to 36 dB, meaning more than 99.9% of EM energy is shielded. The low porosity and high EMI shielding performance enable SiC-Si3N4 composite ceramics to be a promising electromagnetic shielding and structural material.

AB - SiC-Si3N4 composite ceramics are successfully fabricated by pyrolysis of ferrocene-modified polycarbosilane (PCS) mixed with inert filler Si3N4 powders, followed by thermal treatment from 1100 °C to 1400 °C in Ar atmosphere. The porosity of SiC-Si3N4 ceramics decreases to 6.4% due to the addition of inert filler Si3N4. And the content and crystallization degree of free carbon and SiC derived from PCS are improved simultaneously with the increase of thermal treatment temperature. Finally, the free carbon and SiC interconnect, forming the conductive network. As a result, the electromagnetic interference (EMI) shielding performance of the as-prepared ceramic annealed at 1400 °C reaches up to 36 dB, meaning more than 99.9% of EM energy is shielded. The low porosity and high EMI shielding performance enable SiC-Si3N4 composite ceramics to be a promising electromagnetic shielding and structural material.

KW - Electromagnetic shielding properties

KW - Inert filler

KW - Polymer derived ceramics

KW - SiC-SiN

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U2 - 10.1016/j.jmst.2019.07.006

DO - 10.1016/j.jmst.2019.07.006

M3 - 文章

AN - SCOPUS:85075140897

SN - 1005-0302

VL - 35

SP - 2832

EP - 2839

JO - Journal of Materials Science and Technology

JF - Journal of Materials Science and Technology

IS - 12

ER -

Electromagnetic interference shielding properties of polymer derived SiC-Si₃N₄ composite ceramics

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Keywords

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