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Dielectric Properties of Plasma Sprayed Al2O3 and Al2O3- 3wt% TiO2 Coatings

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Abstract:

In this paper the dielectric properties including volume resistivity, relative permittivity and break down voltage for plasma sprayed Al2O3 coating with and without sealing treatment and as sprayed Al2O3-3wt%TiO2 coating with sealing treatment were evaluated. The effect of silicon resin sealing reagent on dielectric properties of plasma sprayed Al2O3 coating was explored. The results indicated that volume resistivity, relative permittivity and break down voltage for Al2O3 and Al2O3-3wt%TiO2 coating with silicon resin sealing treatment was 6.33±2.25×109Ω.m, 8.11±2.99, 16.42±1.68 kV/mm and 1.06±0.5×1010Ω.m, 7.40±0.15, 14.27±1.20 kV/mm respectively. Sealing treatment was helpful for the dielectric properties of Al2O3 coating owing to the decreased residual water in the coating.

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Periodical:

Advanced Materials Research (Volumes 538-541)

Pages:

382-385

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.538-541.382

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Online since:

June 2012

Authors:

Chun Ming Deng, Min Liu, Chang Guang Deng, Ke Song Zhou

Keywords:

Al2o3 Coating, Al2o3-3wt%TiO2 Coating, Dielectric, Plasma Spray, Silicon Resin

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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