Electric dipole moments of particle aggregates in magnetite colloidal solutions in liquid dielectrics

Erin, K. V.

doi:10.1134/s1061933x08040054

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…The above mentioned results lead to a conclusion that the particle aggregation has an adverse effect on the breakdown voltage of transformer oil but the reversible nanoparticle aggregation induced by electric field may have positive impact on breakdown voltage of transformer oil. This induced aggregation may be more effective in capturing the free electrons, reducing their mobility, leading to slower streamer formation and hence improving the breakdown voltages [68][69][70][71].…”

Section: Journal Of Nanomaterialsmentioning

confidence: 99%

A Review on Properties, Opportunities, and Challenges of Transformer Oil-Based Nanofluids

Rafiq

2016

Journal of Nanomaterials

132

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The mineral oil or synthetic oil in conjunction with paper is mainly being applied as dielectric medium in many of the high voltage apparatus. However, the advent of high voltage levels such high voltage alternating current (HVAC) and high voltage direct current (HVDC) has prompted researchers to direct their focus onto an insulation system which can bear the rising high voltage levels. The modern insulating liquid material development is guided by various factors such as high electrical insulation requirements and other safety and economic considerations. Therefore transformer manufacturer companies have to design transformers with these new specific requirements. The transformer oil-based nanofluids with improved dielectric and thermal properties have the potential to replace mineral oil base products in the market place. They are favorable because they function more superior than mineral oil and they contribute definite insulating and thermal gains. This paper reviews recent status of nanofluids use as transformer oils. The nanofluids used as transformer oils are presented and their advantages are described in comparison with mineral oil. The multiple experimental works carried out by different researchers are described, providing an overview of the current research conducted on nanofluids. In addition scope and challenges being confronted in this area of research are clearly presented.

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Section: Journal Of Nanomaterialsmentioning

confidence: 99%

A Review on Properties, Opportunities, and Challenges of Transformer Oil-Based Nanofluids

Rafiq

2016

Journal of Nanomaterials

132

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“…In FFs based on a mineral oil, a magnetodielectric effect has been studied extensively [1]. Although there is high number of papers published on the topic of FFs, the interaction with an electrical field has not received sufficient attention yet from both experimental and theoretical approach [2][3][4]. The most peculiar phenomenon observed in mineral oil-based FFs is the increased breakdown voltage of the oil due to the presence of magnetic nanoparticles (MNP) [5,6].…”

Section: Introductionmentioning

confidence: 99%

Generation of Fe ₃O ₄ Nanoparticle Aggregates in a Ferrofluid Driven by External Electric Field

et al. 2017

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In the paper the experimental study of magnetic nanoparticle aggregation in a transformer oil based ferrofluid driven by an external electric field is reported. The studied ferrofluid was composed of the magnetite nanoparticles, oleic acid surfactant, and transformer oil. Generally, it is considered that superparamagnetic nanoparticles do not interact in the absence of external magnetic field. In the paper we present an experimental observation of the particle assembly formation in a direct current external electric field by optical microscopy. During the observation no external magnetic field was applied. A diluted low-polarity ferrofluid drop on a glass surface was exposed to the external static inhomogeneous electric field. It is assumed that induced dipole-dipole interaction and subsequent dielectrophoretic motion give rise to the electrohydrodynamic flow in the fluid after a certain time period. As a result, a visible particle chain was formed at the drop electrical equator. This demonstration is expected to contribute to the understanding of the streamer formation and electrical breakdown in transformer oil based ferrofluids.

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Analysing the impact of temperature on polarisation in the microlayer of magnetic nanofluid in an electric field

Demin,

Morozova

2023

Pramana - J Phys

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Electric dipole moments of particle aggregates in magnetite colloidal solutions in liquid dielectrics

Cited by 6 publications

References 11 publications

A Review on Properties, Opportunities, and Challenges of Transformer Oil-Based Nanofluids

A Review on Properties, Opportunities, and Challenges of Transformer Oil-Based Nanofluids

Generation of Fe ₃O ₄ Nanoparticle Aggregates in a Ferrofluid Driven by External Electric Field

Analysing the impact of temperature on polarisation in the microlayer of magnetic nanofluid in an electric field

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Electric dipole moments of particle aggregates in magnetite colloidal solutions in liquid dielectrics

Cited by 6 publications

References 11 publications

A Review on Properties, Opportunities, and Challenges of Transformer Oil-Based Nanofluids

A Review on Properties, Opportunities, and Challenges of Transformer Oil-Based Nanofluids

Generation of Fe 3O 4 Nanoparticle Aggregates in a Ferrofluid Driven by External Electric Field

Analysing the impact of temperature on polarisation in the microlayer of magnetic nanofluid in an electric field

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Generation of Fe ₃O ₄ Nanoparticle Aggregates in a Ferrofluid Driven by External Electric Field