Electrical Insulation Properties of Nanocomposites with SiO<sub>2</sub>and MgO Filler

Jeong, In-Bum; Kim, Joung-Sik; Lee, Jong-Yong; Hong, Jin-Woong; Shin, Jong-Yeol

doi:10.4313/teem.2010.11.6.261

Cited by 16 publications

(12 citation statements)

References 10 publications

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“…The analysis of the XRD patterns and the SEM and TEM images indicates that nano-MgO was successfully coated onto the surface of the GR. As reported in other studies, the MgO can serve as a filler or an effective interface to facilitate the transfer of heat between the filler and the polymer matrix. , …”

Section: Resultsmentioning

confidence: 74%

“…The hydroxyl groups formed on the MgO surface generally resulted from the heterolytic dissociation of water molecules by two mechanisms (i.e., hydroxylation of surface cations and protonation of surface oxide ions). Among most of the commonly used inorganic oxides, magnesium oxide (MgO) possesses a high thermal conductivity value (∼42 W m –1 K –1 ) that is 32 times greater than the thermal conductivity of SiO 2 . In our previous study, MgO-coated multiwalled CNTs were used as filler to fabricate epoxy nanocomposites .…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the Heat Transfer Efficiency in Graphene–Epoxy Nanocomposites Using a Magnesium Oxide–Graphene Hybrid Structure

Yang

Zhang

et al. 2015

ACS Appl. Mater. Interfaces

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Composite materials, such as organic matrices doped with inorganic fillers, can generate new properties that exhibit multiple functionalities. In this paper, an epoxy-based nanocomposite that has a high thermal conductivity and a low electrical conductivity, which are required for the use of a material as electronic packaging and insulation, was prepared. The performance of the epoxy was improved by incorporating a magnesium oxide-coated graphene (MgO@GR) nanomaterial into the epoxy matrix. We found that the addition of a MgO coating not only improved the dispersion of the graphene in the matrix and the interfacial bonding between the graphene and epoxy but also enhanced the thermal conductivity of the epoxy while preserving the electrical insulation. By adding 7 wt % MgO@GR, the thermal conductivity of the epoxy nanocomposites was enhanced by 76% compared with that of the neat epoxy, and the electrical resistivity was maintained at 8.66 × 10(14) Ω m.

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Section: Resultsmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 99%

Enhancing the Heat Transfer Efficiency in Graphene–Epoxy Nanocomposites Using a Magnesium Oxide–Graphene Hybrid Structure

Yang

Zhang

et al. 2015

ACS Appl. Mater. Interfaces

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“…For a small amount of nano SiO 2 doping and the increase in the breakdown electric field of the composite material caused by the reason that the size of the nanofiller itself is less than 10 nm, and the forbidden bandwidth is extremely wide, its own conductivity is lower than that of the epoxy resin matrix, the atoms of the nanoparticles have a very high conductivity barrier, the nucleus of the atom is extremely strong binding capacity, the external performance of the deep trap, the carrier passes around the nanoparticles, low-energy electrons will be trapped. The breakdown strength increases as the carrier concentration decreases [17,18]. The reduction of the breakdown field of the composite material is related to the overlap of the nano-interface.…”

Section: Dielectric Strengthmentioning

confidence: 99%

Properties and Simulating Research of Epoxy Resin/Micron-SiC/Nano-SiO2 Composite

et al. 2022

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The dielectric behavior of insulations is a key factor affecting the development of anti-corona materials for generators. Epoxy resin (EP), as the matrix, is blended with inorganic fillers of micron SiC and nano SiO2 to investigate the effect of micro and nano doping on the conductivity and breakdown mechanism of the composites. Using experimental and simulation analysis, it is found that the effect of nano-SiO2 doping concentration on the conductivity is related to the dispersion of SiC particles. The lower concentration of SiO2 could decrease the conductivity of the composites. The conductivity increases with raising the nano-SiO2 doping concentration to a critical value. Meanwhile, the breakdown field strength of the composites decreases with the rising content of SiC in constant SiO2 and increases with more SiO2 when mixed with invariable SiC. When an equivalent electric field is applied to the samples, the electric field at the interface of micron particles is much stronger than the average field of the dielectric, close to the critical electric field of the tunneling effect. The density of the homopolar space charge bound to the surface of the stator bar elevates as the concentration of filled nanoparticles increases, by which a more effective Coulomb potential shield can be built to inhibit the further injection of carriers from the electrode to the interior of the anti-corona layer, thus reducing the space charge accumulation in the anti-corona layer as well as increasing the breakdown field strength of the dielectric.

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“…It is being utilized for electrical insulation [ 110 , 111 ]. Magnetic property of this material make enable its use in low-field magnetic sensor [ 70 ].…”

Section: Introductionmentioning

confidence: 99%

Approaches to synthesize MgO nanostructures for diverse applications

Singh

Sharma

et al. 2020

Heliyon

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Magnesium oxide remained interesting from long time for several important phenomena like; defect induced magnetism, spin electron reflectivity, broad laser emission etc. Moreover, nanostructures of this material exhibited suitability for different kinds of applications ranging from wastewater treatment to spintronics depending upon their shape and size. In this way, researchers had grown nanostructures in the form of nanoparticles, thin films, nanotubes, nanowalls, nanobelts. Though nanoparticles and thin films are well known form of nanostructures and wide variety of synthesis approaches are available, however, limited methodology for other nanostructures are available. In order to grow these nanostructures in an optimized way an understanding of these methods is essential. Thus, this review article depicts an overview of various approaches for design of different kinds of nanostructures.

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Electrical Insulation Properties of Nanocomposites with SiO₂and MgO Filler

Cited by 16 publications

References 10 publications

Enhancing the Heat Transfer Efficiency in Graphene–Epoxy Nanocomposites Using a Magnesium Oxide–Graphene Hybrid Structure

Enhancing the Heat Transfer Efficiency in Graphene–Epoxy Nanocomposites Using a Magnesium Oxide–Graphene Hybrid Structure

Properties and Simulating Research of Epoxy Resin/Micron-SiC/Nano-SiO2 Composite

Approaches to synthesize MgO nanostructures for diverse applications

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Electrical Insulation Properties of Nanocomposites with SiO2and MgO Filler

Cited by 16 publications

References 10 publications

Enhancing the Heat Transfer Efficiency in Graphene–Epoxy Nanocomposites Using a Magnesium Oxide–Graphene Hybrid Structure

Enhancing the Heat Transfer Efficiency in Graphene–Epoxy Nanocomposites Using a Magnesium Oxide–Graphene Hybrid Structure

Properties and Simulating Research of Epoxy Resin/Micron-SiC/Nano-SiO2 Composite

Approaches to synthesize MgO nanostructures for diverse applications

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Product

Resources

About

Electrical Insulation Properties of Nanocomposites with SiO₂and MgO Filler