On the Dielectrical, Electrical and Thermo-Physical Properties of Magnetite Nanoparticle-Doped Synthetic Ester

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OriginalspracheEnglisch
Titel des SammelwerksProceedings of the 21st International Symposium on High Voltage Engineering, Volume 2, ISH 2019
Herausgeber/-innenBalint Nemeth
Kapitel54
Seiten540-548
Seitenumfang9
Band2
Auflage1.
ISBN (elektronisch)978-3-030-31680-8
PublikationsstatusVeröffentlicht - 31 Okt. 2019

Publikationsreihe

NameLecture Notes in Electrical Engineering
Band599 LNEE
ISSN (Print)1876-1100
ISSN (elektronisch)1876-1119

Abstract

This study reports on engineering of stable magnetite nanofluids for application in high voltage technology. Iron oxide (Fe 3O 4) nanoparticles were synthesized by the bottom-up approach. Nanofillers were functionalized with a surfactant and subsequently dispersed in a diluent. Nanoparticles were characterized with transmission electron microscopy (TEM), thereby the average size of 10 nm was determined for nanoparticles in concentrated solution. This colloid is diluted in synthetic ester as base liquid in two concentrations. The high stability of the colloids was confirmed with dynamic light scattering (DLS). AC breakdown voltage beside dielectric properties of the nanofluids were measured. The results show a significant improvement of the breakdown voltage strength. Magnetite nanoparticles are de facto electrically conductive, therefore addition of magnetite nanofillers gives rise to dielectric loss factor. However, magnetite nanoparticles possess much higher relative permittivity compared to the used working fluid, relative permittivity of the colloid increases slightly by infusion of the nanofillers. The thermal conductivity and dynamic viscosity were measured using a transient hot wire setup and a rotational rheometer, respectively. A moderate enhancement in thermal conductivity of the magnetite nanoparticledoped fluid was observed; being intensified with temperature increase. The dynamic viscosity of the prepared fluids remains unchanged despite infusion of the nanoparticles. However, the results turn out significant enhancement in electrical properties and moderate improvement in thermos-physical properties of the nanofluids; holistic investigations should be conducted to achieve an optimized formulation in terms of the type and concentration of the nanoparticle.

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On the Dielectrical, Electrical and Thermo-Physical Properties of Magnetite Nanoparticle-Doped Synthetic Ester. / Imani, Mohammad Taghi; Zámbó, Daniel; Miethe, Jan Frederick et al.
Proceedings of the 21st International Symposium on High Voltage Engineering, Volume 2, ISH 2019. Hrsg. / Balint Nemeth. Band 2 1. Aufl. 2019. S. 540-548 (Lecture Notes in Electrical Engineering; Band 599 LNEE).

Publikation: Beitrag in Buch/Bericht/Sammelwerk/KonferenzbandAufsatz in KonferenzbandForschungPeer-Review

Imani, MT, Zámbó, D, Miethe, JF, Werle, P & Bigall, N-C 2019, On the Dielectrical, Electrical and Thermo-Physical Properties of Magnetite Nanoparticle-Doped Synthetic Ester. in B Nemeth (Hrsg.), Proceedings of the 21st International Symposium on High Voltage Engineering, Volume 2, ISH 2019. 1. Aufl., Bd. 2, Lecture Notes in Electrical Engineering, Bd. 599 LNEE, S. 540-548. https://doi.org/10.1007/978-3-030-31680-8_54
Imani, M. T., Zámbó, D., Miethe, J. F., Werle, P., & Bigall, N.-C. (2019). On the Dielectrical, Electrical and Thermo-Physical Properties of Magnetite Nanoparticle-Doped Synthetic Ester. In B. Nemeth (Hrsg.), Proceedings of the 21st International Symposium on High Voltage Engineering, Volume 2, ISH 2019 (1. Aufl., Band 2, S. 540-548). (Lecture Notes in Electrical Engineering; Band 599 LNEE). https://doi.org/10.1007/978-3-030-31680-8_54
Imani MT, Zámbó D, Miethe JF, Werle P, Bigall NC. On the Dielectrical, Electrical and Thermo-Physical Properties of Magnetite Nanoparticle-Doped Synthetic Ester. in Nemeth B, Hrsg., Proceedings of the 21st International Symposium on High Voltage Engineering, Volume 2, ISH 2019. 1. Aufl. Band 2. 2019. S. 540-548. (Lecture Notes in Electrical Engineering). doi: 10.1007/978-3-030-31680-8_54
Imani, Mohammad Taghi ; Zámbó, Daniel ; Miethe, Jan Frederick et al. / On the Dielectrical, Electrical and Thermo-Physical Properties of Magnetite Nanoparticle-Doped Synthetic Ester. Proceedings of the 21st International Symposium on High Voltage Engineering, Volume 2, ISH 2019. Hrsg. / Balint Nemeth. Band 2 1. Aufl. 2019. S. 540-548 (Lecture Notes in Electrical Engineering).
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title = "On the Dielectrical, Electrical and Thermo-Physical Properties of Magnetite Nanoparticle-Doped Synthetic Ester",
abstract = "This study reports on engineering of stable magnetite nanofluids for application in high voltage technology. Iron oxide (Fe 3O 4) nanoparticles were synthesized by the bottom-up approach. Nanofillers were functionalized with a surfactant and subsequently dispersed in a diluent. Nanoparticles were characterized with transmission electron microscopy (TEM), thereby the average size of 10 nm was determined for nanoparticles in concentrated solution. This colloid is diluted in synthetic ester as base liquid in two concentrations. The high stability of the colloids was confirmed with dynamic light scattering (DLS). AC breakdown voltage beside dielectric properties of the nanofluids were measured. The results show a significant improvement of the breakdown voltage strength. Magnetite nanoparticles are de facto electrically conductive, therefore addition of magnetite nanofillers gives rise to dielectric loss factor. However, magnetite nanoparticles possess much higher relative permittivity compared to the used working fluid, relative permittivity of the colloid increases slightly by infusion of the nanofillers. The thermal conductivity and dynamic viscosity were measured using a transient hot wire setup and a rotational rheometer, respectively. A moderate enhancement in thermal conductivity of the magnetite nanoparticledoped fluid was observed; being intensified with temperature increase. The dynamic viscosity of the prepared fluids remains unchanged despite infusion of the nanoparticles. However, the results turn out significant enhancement in electrical properties and moderate improvement in thermos-physical properties of the nanofluids; holistic investigations should be conducted to achieve an optimized formulation in terms of the type and concentration of the nanoparticle. ",
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T1 - On the Dielectrical, Electrical and Thermo-Physical Properties of Magnetite Nanoparticle-Doped Synthetic Ester

AU - Imani, Mohammad Taghi

AU - Zámbó, Daniel

AU - Miethe, Jan Frederick

AU - Werle, Peter

AU - Bigall, Nadja-Carola

N1 - Funding information: N. C. B acknowledges the financial support of the German Federal Ministry of Education and Research in the framework of “NanoMatFutur” project (03X5525) and of ERC Starting Grant “MAEROSTRUC” (714429) funded under the Horizon 2020 program.

PY - 2019/10/31

Y1 - 2019/10/31

N2 - This study reports on engineering of stable magnetite nanofluids for application in high voltage technology. Iron oxide (Fe 3O 4) nanoparticles were synthesized by the bottom-up approach. Nanofillers were functionalized with a surfactant and subsequently dispersed in a diluent. Nanoparticles were characterized with transmission electron microscopy (TEM), thereby the average size of 10 nm was determined for nanoparticles in concentrated solution. This colloid is diluted in synthetic ester as base liquid in two concentrations. The high stability of the colloids was confirmed with dynamic light scattering (DLS). AC breakdown voltage beside dielectric properties of the nanofluids were measured. The results show a significant improvement of the breakdown voltage strength. Magnetite nanoparticles are de facto electrically conductive, therefore addition of magnetite nanofillers gives rise to dielectric loss factor. However, magnetite nanoparticles possess much higher relative permittivity compared to the used working fluid, relative permittivity of the colloid increases slightly by infusion of the nanofillers. The thermal conductivity and dynamic viscosity were measured using a transient hot wire setup and a rotational rheometer, respectively. A moderate enhancement in thermal conductivity of the magnetite nanoparticledoped fluid was observed; being intensified with temperature increase. The dynamic viscosity of the prepared fluids remains unchanged despite infusion of the nanoparticles. However, the results turn out significant enhancement in electrical properties and moderate improvement in thermos-physical properties of the nanofluids; holistic investigations should be conducted to achieve an optimized formulation in terms of the type and concentration of the nanoparticle.

AB - This study reports on engineering of stable magnetite nanofluids for application in high voltage technology. Iron oxide (Fe 3O 4) nanoparticles were synthesized by the bottom-up approach. Nanofillers were functionalized with a surfactant and subsequently dispersed in a diluent. Nanoparticles were characterized with transmission electron microscopy (TEM), thereby the average size of 10 nm was determined for nanoparticles in concentrated solution. This colloid is diluted in synthetic ester as base liquid in two concentrations. The high stability of the colloids was confirmed with dynamic light scattering (DLS). AC breakdown voltage beside dielectric properties of the nanofluids were measured. The results show a significant improvement of the breakdown voltage strength. Magnetite nanoparticles are de facto electrically conductive, therefore addition of magnetite nanofillers gives rise to dielectric loss factor. However, magnetite nanoparticles possess much higher relative permittivity compared to the used working fluid, relative permittivity of the colloid increases slightly by infusion of the nanofillers. The thermal conductivity and dynamic viscosity were measured using a transient hot wire setup and a rotational rheometer, respectively. A moderate enhancement in thermal conductivity of the magnetite nanoparticledoped fluid was observed; being intensified with temperature increase. The dynamic viscosity of the prepared fluids remains unchanged despite infusion of the nanoparticles. However, the results turn out significant enhancement in electrical properties and moderate improvement in thermos-physical properties of the nanofluids; holistic investigations should be conducted to achieve an optimized formulation in terms of the type and concentration of the nanoparticle.

KW - AC breakdown voltage

KW - Dynamic viscosity

KW - Magnetite nanoparticle

KW - Nanofluid

KW - Synthetic ester

KW - Thermal conductivity

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BT - Proceedings of the 21st International Symposium on High Voltage Engineering, Volume 2, ISH 2019

A2 - Nemeth, Balint

ER -

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