Plasma-sprayed ZrB2/Al2O3 ceramics with excellent high temperature electromagnetic interference shielding properties

Yuchang Qing; Haoyang Yao; Yang Li; Fa Luo

doi:10.1016/j.jeurceramsoc.2020.10.031

Plasma-sprayed ZrB₂/Al₂O₃ ceramics with excellent high temperature electromagnetic interference shielding properties

Yuchang Qing
, Haoyang Yao
, Yang Li
, Fa Luo

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

38 Scopus citations

Abstract

The preparation, microstructures, complex permittivity and the electromagnetic interference (EMI) shielding properties of plasma-sprayed ZrB₂/Al₂O₃ ceramics were investigated. The sprayed ceramics displayed high dielectric losses in terms of a high imaginary part of the complex permittivity in the range of 120–150, indicative of exceptional EMI shielding performance. The total EMI shielding efficiency (EMI SE) of 30 wt% ZrB₂ filled Al₂O₃ ceramics is greater than 31 dB at 25℃ and 44 dB at 600℃ in the range from 8.2–12.4 GHz with a thickness of 1.2 mm. In addition, the ZrB₂/Al₂O₃ ceramics still maintain high EMI SE and a long-term life at high temperature (600℃ for 300 h). Therefore, ZrB₂/Al₂O₃ ceramics may be good candidates for high temperature EMI shielding materials with high EMI shielding efficiency and a long-term life.

Original language	English
Pages (from-to)	1071-1075
Number of pages	5
Journal	Journal of the European Ceramic Society
Volume	41
Issue number	2
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2020.10.031
State	Published - Feb 2021

Keywords

Complex permittivity
Electromagnetic interference
Plasma spray processing
ZrB/AlO ceramics

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10.1016/j.jeurceramsoc.2020.10.031

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title = "Plasma-sprayed ZrB2/Al2O3 ceramics with excellent high temperature electromagnetic interference shielding properties",

abstract = "The preparation, microstructures, complex permittivity and the electromagnetic interference (EMI) shielding properties of plasma-sprayed ZrB2/Al2O3 ceramics were investigated. The sprayed ceramics displayed high dielectric losses in terms of a high imaginary part of the complex permittivity in the range of 120{\textendash}150, indicative of exceptional EMI shielding performance. The total EMI shielding efficiency (EMI SE) of 30 wt\% ZrB2 filled Al2O3 ceramics is greater than 31 dB at 25℃ and 44 dB at 600℃ in the range from 8.2{\textendash}12.4 GHz with a thickness of 1.2 mm. In addition, the ZrB2/Al2O3 ceramics still maintain high EMI SE and a long-term life at high temperature (600℃ for 300 h). Therefore, ZrB2/Al2O3 ceramics may be good candidates for high temperature EMI shielding materials with high EMI shielding efficiency and a long-term life.",

keywords = "Complex permittivity, Electromagnetic interference, Plasma spray processing, ZrB/AlO ceramics",

author = "Yuchang Qing and Haoyang Yao and Yang Li and Fa Luo",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2021",

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doi = "10.1016/j.jeurceramsoc.2020.10.031",

language = "英语",

volume = "41",

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T1 - Plasma-sprayed ZrB2/Al2O3 ceramics with excellent high temperature electromagnetic interference shielding properties

AU - Qing, Yuchang

AU - Yao, Haoyang

AU - Li, Yang

AU - Luo, Fa

PY - 2021/2

Y1 - 2021/2

N2 - The preparation, microstructures, complex permittivity and the electromagnetic interference (EMI) shielding properties of plasma-sprayed ZrB2/Al2O3 ceramics were investigated. The sprayed ceramics displayed high dielectric losses in terms of a high imaginary part of the complex permittivity in the range of 120–150, indicative of exceptional EMI shielding performance. The total EMI shielding efficiency (EMI SE) of 30 wt% ZrB2 filled Al2O3 ceramics is greater than 31 dB at 25℃ and 44 dB at 600℃ in the range from 8.2–12.4 GHz with a thickness of 1.2 mm. In addition, the ZrB2/Al2O3 ceramics still maintain high EMI SE and a long-term life at high temperature (600℃ for 300 h). Therefore, ZrB2/Al2O3 ceramics may be good candidates for high temperature EMI shielding materials with high EMI shielding efficiency and a long-term life.

AB - The preparation, microstructures, complex permittivity and the electromagnetic interference (EMI) shielding properties of plasma-sprayed ZrB2/Al2O3 ceramics were investigated. The sprayed ceramics displayed high dielectric losses in terms of a high imaginary part of the complex permittivity in the range of 120–150, indicative of exceptional EMI shielding performance. The total EMI shielding efficiency (EMI SE) of 30 wt% ZrB2 filled Al2O3 ceramics is greater than 31 dB at 25℃ and 44 dB at 600℃ in the range from 8.2–12.4 GHz with a thickness of 1.2 mm. In addition, the ZrB2/Al2O3 ceramics still maintain high EMI SE and a long-term life at high temperature (600℃ for 300 h). Therefore, ZrB2/Al2O3 ceramics may be good candidates for high temperature EMI shielding materials with high EMI shielding efficiency and a long-term life.

KW - Complex permittivity

KW - Electromagnetic interference

KW - Plasma spray processing

KW - ZrB/AlO ceramics

UR - https://www.scopus.com/pages/publications/85094560131

U2 - 10.1016/j.jeurceramsoc.2020.10.031

DO - 10.1016/j.jeurceramsoc.2020.10.031

M3 - 文章

AN - SCOPUS:85094560131

SN - 0955-2219

VL - 41

SP - 1071

EP - 1075

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 2

ER -

Plasma-sprayed ZrB₂/Al₂O₃ ceramics with excellent high temperature electromagnetic interference shielding properties

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Keywords

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