Effects of the annealing temperature and atmosphere on the microstructures and dielectric properties of ZnO/Al                         2                         O                         3                          composite coatings

Ping Wei; Dongmei Zhu; Shanshan Huang; Wancheng Zhou; Fa Luo

doi:10.1016/j.apsusc.2013.08.096

Effects of the annealing temperature and atmosphere on the microstructures and dielectric properties of ZnO/Al ₂ O ₃ composite coatings

Ping Wei, Dongmei Zhu, Shanshan Huang, Wancheng Zhou, Fa Luo

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

22 Scopus citations

Abstract

ZnO/Al ₂ O ₃ composite coatings were fabricated by atmospheric plasma spraying technology (APS). The effects of annealing temperature and atmospheres (in air or vacuum) on the microstructure and phase transformation of the sprayed coatings were studied by scanning electron microscope (SEM) and X-ray diffraction spectroscopy (XRD). The microwave dielectric properties of these coatings after annealing treatment were also discussed in the frequency range of 8.2-12.4 GHz. Both the real part and the imaginary part of the permittivity decreased significantly with increased annealing temperature when the annealing process is carried out in air atmosphere, while the complex permittivity of the coating annealed in vacuum atmosphere was obviously increased compared to the initial sprayed coating. The mechanism for the variation of dielectric properties of sprayed ZnO/Al ₂ O ₃ composite coating caused by annealing treatment was discussed in this study.

Original language	English
Pages (from-to)	577-582
Number of pages	6
Journal	Applied Surface Science
Volume	285
Issue number	PARTB
DOIs	https://doi.org/10.1016/j.apsusc.2013.08.096
State	Published - 15 Nov 2013

Keywords

Annealing treatment
Dielectric properties
High-temperature absorbing material
Plasma spraying

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10.1016/j.apsusc.2013.08.096

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Wei, P., Zhu, D., Huang, S., Zhou, W., & Luo, F. (2013). Effects of the annealing temperature and atmosphere on the microstructures and dielectric properties of ZnO/Al ₂ O ₃ composite coatings Applied Surface Science, 285(PARTB), 577-582. https://doi.org/10.1016/j.apsusc.2013.08.096

Wei, Ping ; Zhu, Dongmei ; Huang, Shanshan et al. / Effects of the annealing temperature and atmosphere on the microstructures and dielectric properties of ZnO/Al ₂ O ₃ composite coatings In: Applied Surface Science. 2013 ; Vol. 285, No. PARTB. pp. 577-582.

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title = " Effects of the annealing temperature and atmosphere on the microstructures and dielectric properties of ZnO/Al 2 O 3 composite coatings ",

abstract = " ZnO/Al 2 O 3 composite coatings were fabricated by atmospheric plasma spraying technology (APS). The effects of annealing temperature and atmospheres (in air or vacuum) on the microstructure and phase transformation of the sprayed coatings were studied by scanning electron microscope (SEM) and X-ray diffraction spectroscopy (XRD). The microwave dielectric properties of these coatings after annealing treatment were also discussed in the frequency range of 8.2-12.4 GHz. Both the real part and the imaginary part of the permittivity decreased significantly with increased annealing temperature when the annealing process is carried out in air atmosphere, while the complex permittivity of the coating annealed in vacuum atmosphere was obviously increased compared to the initial sprayed coating. The mechanism for the variation of dielectric properties of sprayed ZnO/Al 2 O 3 composite coating caused by annealing treatment was discussed in this study.",

keywords = "Annealing treatment, Dielectric properties, High-temperature absorbing material, Plasma spraying",

author = "Ping Wei and Dongmei Zhu and Shanshan Huang and Wancheng Zhou and Fa Luo",

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doi = "10.1016/j.apsusc.2013.08.096",

language = "英语",

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Wei, P, Zhu, D, Huang, S, Zhou, W & Luo, F 2013, ' Effects of the annealing temperature and atmosphere on the microstructures and dielectric properties of ZnO/Al ₂ O ₃ composite coatings ', Applied Surface Science, vol. 285, no. PARTB, pp. 577-582. https://doi.org/10.1016/j.apsusc.2013.08.096

Effects of the annealing temperature and atmosphere on the microstructures and dielectric properties of ZnO/Al ₂ O ₃ composite coatings . / Wei, Ping; Zhu, Dongmei; Huang, Shanshan et al.
In: Applied Surface Science, Vol. 285, No. PARTB, 15.11.2013, p. 577-582.

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

TY - JOUR

T1 - Effects of the annealing temperature and atmosphere on the microstructures and dielectric properties of ZnO/Al 2 O 3 composite coatings

AU - Wei, Ping

AU - Zhu, Dongmei

AU - Huang, Shanshan

AU - Zhou, Wancheng

AU - Luo, Fa

PY - 2013/11/15

Y1 - 2013/11/15

N2 - ZnO/Al 2 O 3 composite coatings were fabricated by atmospheric plasma spraying technology (APS). The effects of annealing temperature and atmospheres (in air or vacuum) on the microstructure and phase transformation of the sprayed coatings were studied by scanning electron microscope (SEM) and X-ray diffraction spectroscopy (XRD). The microwave dielectric properties of these coatings after annealing treatment were also discussed in the frequency range of 8.2-12.4 GHz. Both the real part and the imaginary part of the permittivity decreased significantly with increased annealing temperature when the annealing process is carried out in air atmosphere, while the complex permittivity of the coating annealed in vacuum atmosphere was obviously increased compared to the initial sprayed coating. The mechanism for the variation of dielectric properties of sprayed ZnO/Al 2 O 3 composite coating caused by annealing treatment was discussed in this study.

AB - ZnO/Al 2 O 3 composite coatings were fabricated by atmospheric plasma spraying technology (APS). The effects of annealing temperature and atmospheres (in air or vacuum) on the microstructure and phase transformation of the sprayed coatings were studied by scanning electron microscope (SEM) and X-ray diffraction spectroscopy (XRD). The microwave dielectric properties of these coatings after annealing treatment were also discussed in the frequency range of 8.2-12.4 GHz. Both the real part and the imaginary part of the permittivity decreased significantly with increased annealing temperature when the annealing process is carried out in air atmosphere, while the complex permittivity of the coating annealed in vacuum atmosphere was obviously increased compared to the initial sprayed coating. The mechanism for the variation of dielectric properties of sprayed ZnO/Al 2 O 3 composite coating caused by annealing treatment was discussed in this study.

KW - Annealing treatment

KW - Dielectric properties

KW - High-temperature absorbing material

KW - Plasma spraying

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M3 - 文章

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VL - 285

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Wei P, Zhu D, Huang S, Zhou W, Luo F. Effects of the annealing temperature and atmosphere on the microstructures and dielectric properties of ZnO/Al ₂ O ₃ composite coatings Applied Surface Science. 2013 Nov 15;285(PARTB):577-582. doi: 10.1016/j.apsusc.2013.08.096

Effects of the annealing temperature and atmosphere on the microstructures and dielectric properties of ZnO/Al ₂ O ₃ composite coatings

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