Thin-thickness FeSiAl/flake graphite-filled Al2O3 ceramics with enhanced microwave absorption

Yuchang Qing; Wancheng Zhou; Fa Luo; Dongmei Zhu

doi:10.1016/j.ceramint.2016.09.139

Thin-thickness FeSiAl/flake graphite-filled Al₂O₃ ceramics with enhanced microwave absorption

Yuchang Qing, Wancheng Zhou, Fa Luo, Dongmei Zhu

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

51 Scopus citations

Abstract

Thin and enhanced microwave absorption FeSiAl/ flake graphite (FG) filled Al₂O₃ ceramics were fabricated by low power plasma spraying. The characteristics of the sprayed ceramics, such as phase composition, microstructure, electromagnetic (EM) properties and reflection loss (RL) were investigated. Suitable values and frequency dependence of the complex permittivity of the FeSiAl/ FG filled Al₂O₃ ceramics can be obtained in the Ku-band due to the larger internal boundary layer capacitance and the combination of the advantages of the FeSiAl and FG. RL values less than −7 dB (larger than 80% absorption) can be obtained in the whole Ku-band for the FeSiAl/FG filled Al₂O₃ ceramics with a sample thickness of 0.8 mm. These results suggest a possible use of these ceramics as effective microwave absorbing materials for EM applications.

Original language	English
Pages (from-to)	870-874
Number of pages	5
Journal	Ceramics International
Volume	43
Issue number	1
DOIs	https://doi.org/10.1016/j.ceramint.2016.09.139
State	Published - 1 Jan 2017

Keywords

Complex permittivity
Electronic ceramics
Microwave absorption
Thermal spray processing

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10.1016/j.ceramint.2016.09.139

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title = "Thin-thickness FeSiAl/flake graphite-filled Al2O3 ceramics with enhanced microwave absorption",

abstract = "Thin and enhanced microwave absorption FeSiAl/ flake graphite (FG) filled Al2O3 ceramics were fabricated by low power plasma spraying. The characteristics of the sprayed ceramics, such as phase composition, microstructure, electromagnetic (EM) properties and reflection loss (RL) were investigated. Suitable values and frequency dependence of the complex permittivity of the FeSiAl/ FG filled Al2O3 ceramics can be obtained in the Ku-band due to the larger internal boundary layer capacitance and the combination of the advantages of the FeSiAl and FG. RL values less than −7 dB (larger than 80% absorption) can be obtained in the whole Ku-band for the FeSiAl/FG filled Al2O3 ceramics with a sample thickness of 0.8 mm. These results suggest a possible use of these ceramics as effective microwave absorbing materials for EM applications.",

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AU - Qing, Yuchang

AU - Zhou, Wancheng

AU - Luo, Fa

AU - Zhu, Dongmei

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Thin and enhanced microwave absorption FeSiAl/ flake graphite (FG) filled Al2O3 ceramics were fabricated by low power plasma spraying. The characteristics of the sprayed ceramics, such as phase composition, microstructure, electromagnetic (EM) properties and reflection loss (RL) were investigated. Suitable values and frequency dependence of the complex permittivity of the FeSiAl/ FG filled Al2O3 ceramics can be obtained in the Ku-band due to the larger internal boundary layer capacitance and the combination of the advantages of the FeSiAl and FG. RL values less than −7 dB (larger than 80% absorption) can be obtained in the whole Ku-band for the FeSiAl/FG filled Al2O3 ceramics with a sample thickness of 0.8 mm. These results suggest a possible use of these ceramics as effective microwave absorbing materials for EM applications.

AB - Thin and enhanced microwave absorption FeSiAl/ flake graphite (FG) filled Al2O3 ceramics were fabricated by low power plasma spraying. The characteristics of the sprayed ceramics, such as phase composition, microstructure, electromagnetic (EM) properties and reflection loss (RL) were investigated. Suitable values and frequency dependence of the complex permittivity of the FeSiAl/ FG filled Al2O3 ceramics can be obtained in the Ku-band due to the larger internal boundary layer capacitance and the combination of the advantages of the FeSiAl and FG. RL values less than −7 dB (larger than 80% absorption) can be obtained in the whole Ku-band for the FeSiAl/FG filled Al2O3 ceramics with a sample thickness of 0.8 mm. These results suggest a possible use of these ceramics as effective microwave absorbing materials for EM applications.

KW - Complex permittivity

KW - Electronic ceramics

KW - Microwave absorption

KW - Thermal spray processing

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Thin-thickness FeSiAl/flake graphite-filled Al₂O₃ ceramics with enhanced microwave absorption

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Keywords

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