Effects of ambient conditions on the dielectric properties of thermally sprayed ceramic coating

M. Niittymäki; B. Rotthier; Tomi Suhonen; Jarkko Metsäjoki; K. Lahti

doi:10.5324/nordis.v0i23.2475

Effects of ambient conditions on the dielectric properties of thermally sprayed ceramic coating

M. Niittymäki, B. Rotthier, Tomi Suhonen, Jarkko Metsäjoki, K. Lahti

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

Thermal spraying techniques are used to manufacture insulating coatings especially for demanding applications like fuel cells where normal insulating materials cannot be used. In electrical insulation applications, the mostly used coating materials are aluminum oxide (Al₂O₃), magnesium oxide (MgO) and magnesium aluminate (MgAl₂O₄). Dielectric properties of thermally sprayed ceramic coatings are strongly affected by ambient conditions, and in addition to this they are not well documented in the literature. In this paper the effects of environmental conditions on certain dielectric properties of a thermally sprayed coating are studied. DC resistivity as well as permittivity and losses at different frequencies at relative humidities of 20 % and 45 % at temperature of 20 °C, 40 °C and 60 °C will be reported in the paper for Al2O3 samples sprayed using HVOF (High Velocity Oxygen Fuel) technique. DC dielectric breakdown strength is also studied for the HVOF alumina coating at temperature of 20 °C and relative humidity of 20 %. Effects of ambient conditions and coating material composition are also analyzed.

Original language	English
Title of host publication	Proceedings of the 23rd Nordic Insulation Symposium
Subtitle of host publication	NORD-IS 2013
Editors	Lasse Postmyr
Publisher	Akademika forlag
Pages	131-135
ISBN (Print)	978-8-2321-0274-7
DOIs	https://doi.org/10.5324/nordis.v0i23.2475
Publication status	Published - 2013
MoE publication type	A4 Article in a conference publication
Event	The 23rd Nordic Insulation Symposium, NORD-IS 13 - Trondheim, Norway Duration: 9 Jun 2013 → 12 Jun 2013

Conference

Conference	The 23rd Nordic Insulation Symposium, NORD-IS 13
Abbreviated title	NORD-IS 2013
Country/Territory	Norway
City	Trondheim
Period	9/06/13 → 12/06/13

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Cite this

@inproceedings{66747d6d7c6643dfa6ce4ee8ebadc1cf,

title = "Effects of ambient conditions on the dielectric properties of thermally sprayed ceramic coating",

abstract = "Thermal spraying techniques are used to manufacture insulating coatings especially for demanding applications like fuel cells where normal insulating materials cannot be used. In electrical insulation applications, the mostly used coating materials are aluminum oxide (Al2O3), magnesium oxide (MgO) and magnesium aluminate (MgAl2O4). Dielectric properties of thermally sprayed ceramic coatings are strongly affected by ambient conditions, and in addition to this they are not well documented in the literature. In this paper the effects of environmental conditions on certain dielectric properties of a thermally sprayed coating are studied. DC resistivity as well as permittivity and losses at different frequencies at relative humidities of 20 % and 45 % at temperature of 20 °C, 40 °C and 60 °C will be reported in the paper for Al2O3 samples sprayed using HVOF (High Velocity Oxygen Fuel) technique. DC dielectric breakdown strength is also studied for the HVOF alumina coating at temperature of 20 °C and relative humidity of 20 %. Effects of ambient conditions and coating material composition are also analyzed.",

author = "M. Niittym{\"a}ki and B. Rotthier and Tomi Suhonen and Jarkko Mets{\"a}joki and K. Lahti",

note = "Project code: 75071; The 23rd Nordic Insulation Symposium, NORD-IS 13, NORD-IS 2013 ; Conference date: 09-06-2013 Through 12-06-2013",

year = "2013",

doi = "10.5324/nordis.v0i23.2475",

language = "English",

isbn = "978-8-2321-0274-7",

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editor = "Lasse Postmyr",

booktitle = "Proceedings of the 23rd Nordic Insulation Symposium",

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address = "Norway",

}

Niittymäki, M, Rotthier, B, Suhonen, T , Metsäjoki, J & Lahti, K 2013, Effects of ambient conditions on the dielectric properties of thermally sprayed ceramic coating. in L Postmyr (ed.), Proceedings of the 23rd Nordic Insulation Symposium: NORD-IS 2013. Akademika forlag, pp. 131-135, The 23rd Nordic Insulation Symposium, NORD-IS 13, Trondheim, Norway, 9/06/13. https://doi.org/10.5324/nordis.v0i23.2475

Effects of ambient conditions on the dielectric properties of thermally sprayed ceramic coating. / Niittymäki, M.; Rotthier, B.; Suhonen, Tomi et al.
Proceedings of the 23rd Nordic Insulation Symposium: NORD-IS 2013. ed. / Lasse Postmyr. Akademika forlag, 2013. p. 131-135.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Effects of ambient conditions on the dielectric properties of thermally sprayed ceramic coating

AU - Niittymäki, M.

AU - Rotthier, B.

AU - Suhonen, Tomi

AU - Metsäjoki, Jarkko

AU - Lahti, K.

N1 - Project code: 75071

PY - 2013

Y1 - 2013

N2 - Thermal spraying techniques are used to manufacture insulating coatings especially for demanding applications like fuel cells where normal insulating materials cannot be used. In electrical insulation applications, the mostly used coating materials are aluminum oxide (Al2O3), magnesium oxide (MgO) and magnesium aluminate (MgAl2O4). Dielectric properties of thermally sprayed ceramic coatings are strongly affected by ambient conditions, and in addition to this they are not well documented in the literature. In this paper the effects of environmental conditions on certain dielectric properties of a thermally sprayed coating are studied. DC resistivity as well as permittivity and losses at different frequencies at relative humidities of 20 % and 45 % at temperature of 20 °C, 40 °C and 60 °C will be reported in the paper for Al2O3 samples sprayed using HVOF (High Velocity Oxygen Fuel) technique. DC dielectric breakdown strength is also studied for the HVOF alumina coating at temperature of 20 °C and relative humidity of 20 %. Effects of ambient conditions and coating material composition are also analyzed.

AB - Thermal spraying techniques are used to manufacture insulating coatings especially for demanding applications like fuel cells where normal insulating materials cannot be used. In electrical insulation applications, the mostly used coating materials are aluminum oxide (Al2O3), magnesium oxide (MgO) and magnesium aluminate (MgAl2O4). Dielectric properties of thermally sprayed ceramic coatings are strongly affected by ambient conditions, and in addition to this they are not well documented in the literature. In this paper the effects of environmental conditions on certain dielectric properties of a thermally sprayed coating are studied. DC resistivity as well as permittivity and losses at different frequencies at relative humidities of 20 % and 45 % at temperature of 20 °C, 40 °C and 60 °C will be reported in the paper for Al2O3 samples sprayed using HVOF (High Velocity Oxygen Fuel) technique. DC dielectric breakdown strength is also studied for the HVOF alumina coating at temperature of 20 °C and relative humidity of 20 %. Effects of ambient conditions and coating material composition are also analyzed.

U2 - 10.5324/nordis.v0i23.2475

DO - 10.5324/nordis.v0i23.2475

M3 - Conference article in proceedings

SN - 978-8-2321-0274-7

SP - 131

EP - 135

BT - Proceedings of the 23rd Nordic Insulation Symposium

A2 - Postmyr, Lasse

PB - Akademika forlag

T2 - The 23rd Nordic Insulation Symposium, NORD-IS 13

Y2 - 9 June 2013 through 12 June 2013

ER -

Effects of ambient conditions on the dielectric properties of thermally sprayed ceramic coating

Abstract

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