Effect of temperature on the dielectric properties of hydrofluoroethers and fluorinated ketone
Effect of temperature on the dielectric properties of hydrofluoroethers and fluorinated ketone
The AC and DC dielectric properties of hydrofluoroethers (HFE) [C3F7 OCH3 ] and fluorinated ketone (FK) [C2F5 C(O)CF(CF3)2] have been characterised by dielectric spectroscopy and DC conductivity at different temperatures. Results show that DC conductivity and imaginary permittivity of both fluids are positively correlated with increasing temperature. However, the real permittivity decreases with increasing temperature. The breakdown voltages of HFE and FK at 295 K are∼10 kV mm−1 . Reducing temperature is an effective method to increase the breakdown voltage of the FK coolant, but the breakdown voltage of HFE is less temperature dependent. Finally, as expected repeated breakdown had no significant effect on the AC dielectric strength of both liquids.
329-336
Wu, Sijun
73a763f3-66a6-4cac-a2fe-c83e7e30fa56
Chippendale, Richard D.
18bccba7-02f3-4f9f-97d3-a8733dc7226d
Lewin, Paul L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Hemrle, Jaroslav
d9cbe9ae-04d0-4d31-bf54-907b735050d9
Kaufmann, Lilian
f5677ddf-0292-47d6-90bd-de33158ab44e
May 2019
Wu, Sijun
73a763f3-66a6-4cac-a2fe-c83e7e30fa56
Chippendale, Richard D.
18bccba7-02f3-4f9f-97d3-a8733dc7226d
Lewin, Paul L.
78b4fc49-1cb3-4db9-ba90-3ae70c0f639e
Hemrle, Jaroslav
d9cbe9ae-04d0-4d31-bf54-907b735050d9
Kaufmann, Lilian
f5677ddf-0292-47d6-90bd-de33158ab44e
Wu, Sijun, Chippendale, Richard D., Lewin, Paul L., Hemrle, Jaroslav and Kaufmann, Lilian
(2019)
Effect of temperature on the dielectric properties of hydrofluoroethers and fluorinated ketone.
IET Science, Measurement and Technology, 13 (3), .
(doi:10.1049/iet-smt.2018.5046).
Abstract
The AC and DC dielectric properties of hydrofluoroethers (HFE) [C3F7 OCH3 ] and fluorinated ketone (FK) [C2F5 C(O)CF(CF3)2] have been characterised by dielectric spectroscopy and DC conductivity at different temperatures. Results show that DC conductivity and imaginary permittivity of both fluids are positively correlated with increasing temperature. However, the real permittivity decreases with increasing temperature. The breakdown voltages of HFE and FK at 295 K are∼10 kV mm−1 . Reducing temperature is an effective method to increase the breakdown voltage of the FK coolant, but the breakdown voltage of HFE is less temperature dependent. Finally, as expected repeated breakdown had no significant effect on the AC dielectric strength of both liquids.
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e-pub ahead of print date: 17 December 2018
Published date: May 2019
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Local EPrints ID: 431023
URI: http://eprints.soton.ac.uk/id/eprint/431023
ISSN: 1751-8822
PURE UUID: 2589cbf1-2b1d-458d-abc4-5abd6d1f5a28
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Date deposited: 22 May 2019 16:30
Last modified: 16 Mar 2024 02:41
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Author:
Sijun Wu
Author:
Richard D. Chippendale
Author:
Paul L. Lewin
Author:
Jaroslav Hemrle
Author:
Lilian Kaufmann
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