Dielectric and Infrared Properties of Plasma Sprayed Nano β-SiC/ Al2O3 Agglomerate Composite Absorbing Coatings

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In this paper, the nano-β-SiC/Al2O3 composite absorbing coatings produced by plasma spraying technology were reported. Where, β-SiC phase dissipates in the boundary of Al2O3 grains. Then, the relationship between microstructure and dielectric properties was built. Some results are shown as follows: with increasing of flatten ratio of particle and pores, the microwave reflectivity coefficient of composite absorbing coatings decreases and ranges to low frequency. And, there exists a threshold value, about 30wt% of nano β-SiC, the microwave reflectivity coefficient of composite absorbing coatings can reach to -8 dB. The infrared properties of β-SiC/ Al2O3composite absorbing coatings with experiment is about 0.6~0.8, respectively.

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Advanced Materials Research (Volumes 634-638)

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1901-1905

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January 2013

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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