Electric field dependency of dielectric behavior of thermally sprayed ceramic coatings

M. Niittymäki, K. Lahti, T. Suhonen, J. Metsäjoki

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

4 Citations (Scopus)

Abstract

High temperature applications e.g. fuel cells require ceramic based insulation solutions instead of polymers. The aim of this paper was to characterize the dielectric properties of thermally sprayed ceramic coatings; especially the electric field dependency of AC and DC behavior of thermally sprayed ceramic coatings. One of the spinel samples and one of the alumina samples have quite similar lamellar microstructure which may partly explain their similar type of behavior in DC resistivity as well as in AC loss indexes at low frequencies. These two samples had smaller lamellar size than the other alumina and spinel samples which also had quite similar behavior of AC losses at low frequencies, respectively. In addition to the lamellar size and structure, also micro cracks in the coating microstructure are proposed to have an effect on the dielectric behavior and its electric field dependency.
Original languageEnglish
Title of host publication2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM)
PublisherInstitute of Electrical and Electronic Engineers IEEE
Pages500-503
ISBN (Electronic)978-1-4799-8903-4, 978-1-4799-8902-7
DOIs
Publication statusPublished - 2015
MoE publication typeA4 Article in a conference publication
EventIEEE 11th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015 - Sydney, Australia
Duration: 19 Jul 201522 Jul 2015
Conference number: 11

Publication series

Name
ISSN (Print)2160-9225
ISSN (Electronic)2160-9241

Conference

ConferenceIEEE 11th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015
Abbreviated titleICPADM 2015
CountryAustralia
CitySydney
Period19/07/1522/07/15

Fingerprint

ceramic coatings
sprayed coatings
alternating current
electric fields
spinel
aluminum oxides
direct current
low frequencies
microstructure
insulation
fuel cells
dielectric properties
cracks
ceramics
coatings
electrical resistivity
polymers

Keywords

  • alumina
  • breakdown
  • ceramic
  • coating
  • dc conductivity
  • dielectric spectroscopy
  • HVOF
  • loss index
  • resistivity
  • spinel
  • thermal spraying
  • ProperPart
  • ProperTune

Cite this

Niittymäki, M., Lahti, K., Suhonen, T., & Metsäjoki, J. (2015). Electric field dependency of dielectric behavior of thermally sprayed ceramic coatings. In 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM) (pp. 500-503). Institute of Electrical and Electronic Engineers IEEE. https://doi.org/10.1109/ICPADM.2015.7295318
Niittymäki, M. ; Lahti, K. ; Suhonen, T. ; Metsäjoki, J. / Electric field dependency of dielectric behavior of thermally sprayed ceramic coatings. 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). Institute of Electrical and Electronic Engineers IEEE, 2015. pp. 500-503
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abstract = "High temperature applications e.g. fuel cells require ceramic based insulation solutions instead of polymers. The aim of this paper was to characterize the dielectric properties of thermally sprayed ceramic coatings; especially the electric field dependency of AC and DC behavior of thermally sprayed ceramic coatings. One of the spinel samples and one of the alumina samples have quite similar lamellar microstructure which may partly explain their similar type of behavior in DC resistivity as well as in AC loss indexes at low frequencies. These two samples had smaller lamellar size than the other alumina and spinel samples which also had quite similar behavior of AC losses at low frequencies, respectively. In addition to the lamellar size and structure, also micro cracks in the coating microstructure are proposed to have an effect on the dielectric behavior and its electric field dependency.",
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Niittymäki, M, Lahti, K, Suhonen, T & Metsäjoki, J 2015, Electric field dependency of dielectric behavior of thermally sprayed ceramic coatings. in 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). Institute of Electrical and Electronic Engineers IEEE, pp. 500-503, IEEE 11th International Conference on the Properties and Applications of Dielectric Materials, ICPADM 2015, Sydney, Australia, 19/07/15. https://doi.org/10.1109/ICPADM.2015.7295318

Electric field dependency of dielectric behavior of thermally sprayed ceramic coatings. / Niittymäki, M.; Lahti, K.; Suhonen, T.; Metsäjoki, J.

2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). Institute of Electrical and Electronic Engineers IEEE, 2015. p. 500-503.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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AU - Suhonen, T.

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N2 - High temperature applications e.g. fuel cells require ceramic based insulation solutions instead of polymers. The aim of this paper was to characterize the dielectric properties of thermally sprayed ceramic coatings; especially the electric field dependency of AC and DC behavior of thermally sprayed ceramic coatings. One of the spinel samples and one of the alumina samples have quite similar lamellar microstructure which may partly explain their similar type of behavior in DC resistivity as well as in AC loss indexes at low frequencies. These two samples had smaller lamellar size than the other alumina and spinel samples which also had quite similar behavior of AC losses at low frequencies, respectively. In addition to the lamellar size and structure, also micro cracks in the coating microstructure are proposed to have an effect on the dielectric behavior and its electric field dependency.

AB - High temperature applications e.g. fuel cells require ceramic based insulation solutions instead of polymers. The aim of this paper was to characterize the dielectric properties of thermally sprayed ceramic coatings; especially the electric field dependency of AC and DC behavior of thermally sprayed ceramic coatings. One of the spinel samples and one of the alumina samples have quite similar lamellar microstructure which may partly explain their similar type of behavior in DC resistivity as well as in AC loss indexes at low frequencies. These two samples had smaller lamellar size than the other alumina and spinel samples which also had quite similar behavior of AC losses at low frequencies, respectively. In addition to the lamellar size and structure, also micro cracks in the coating microstructure are proposed to have an effect on the dielectric behavior and its electric field dependency.

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KW - breakdown

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KW - loss index

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KW - thermal spraying

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KW - ProperTune

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M3 - Conference article in proceedings

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Niittymäki M, Lahti K, Suhonen T, Metsäjoki J. Electric field dependency of dielectric behavior of thermally sprayed ceramic coatings. In 2015 IEEE 11th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). Institute of Electrical and Electronic Engineers IEEE. 2015. p. 500-503 https://doi.org/10.1109/ICPADM.2015.7295318