Synergistic Effect of Nano-Silica and Micro-Silica Fillers on the Rheological and Thermal Properties of Epoxy Resins

Khanum, Khadija Kanwal; Kostalas, Andreas; Jayaram, S.; Ulcar, John

doi:10.1109/tia.2022.3186285

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…1 Epoxy (EP) is a commonly used insulation material in electronics packaging and power system apparatus because of easy processing, lower cost, and excellent electrical and physio-chemical properties. 2,3 However, it suffers from inferior thermal stability and thermal conductivity at high temperatures. 4 This results in poor heat dissipation during the equipment's operation, ultimately affecting its dielectric strength and lifetime.…”

Section: Introductionmentioning

confidence: 99%

“…Advancement in the third generation of electrical power equipment has put back a focus on developing reliable insulation packaging materials 1 . Epoxy (EP) is a commonly used insulation material in electronics packaging and power system apparatus because of easy processing, lower cost, and excellent electrical and physio‐chemical properties 2,3 . However, it suffers from inferior thermal stability and thermal conductivity at high temperatures 4 .…”

Section: Introductionmentioning

confidence: 99%

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Synergistic effect of positive temperature coefficient and thermally conductive micro‐nano fillers on electrical and thermal properties of epoxy resin

Rahman,

Chen,

Zhang

et al. 2024

Polymer Composites

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This study investigates the effect of positive temperature coefficient (PTC) fillers, i.e., barium strontium titanate (BST‐60) and nano hexagonal boron nitride (h‐BN) fillers, on thermal and dielectric insulation properties of epoxy (EP). The electrical resistivity, DC breakdown strength, space charge, thermal conductivity, thermogravimetric analysis, and glass transition temperature (Tg) of EP composites were measured. Results indicate that, below curie temperature, the EP composites containing 0.5 and 1 wt% of BST and 5 wt% of h‐BN have superior electrical resistivity, breakdown strength, and thermal conductivity. However, above curie temperature, the EP composites containing 2 and 2.5 wt% of BST and 5 wt% of h‐BN have superior insulation properties than the pure EP and other composites. While the thermal properties of EP improve with an increase in h‐BN loading to 10 wt%, its dielectric properties are slightly compromised due to the presence of tiny defects in the composite material. It is hypothesized that the BST‐60 suppresses the negative temperature coefficient effect (NTC) of EP by regulating the electrical resistivity above the curie point, whereas nano h‐BN enhances the thermal conductivity of EP by constructing a heat dissipation path. The proposed mechanism for charge dynamics along with heat conduction‐dissipation explains the fillers' behavior at different temperatures.Highlights Analysis of epoxy composites with polydopamine‐modified BST and h‐BN fillers. PTC fillers are used to mitigate the negative temperature effect of epoxy. Optimal fillers wt% improves dielectric and thermal properties. This study shows that optimized epoxy composites can be used for packaging.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synergistic effect of positive temperature coefficient and thermally conductive micro‐nano fillers on electrical and thermal properties of epoxy resin

Rahman,

Chen,

Zhang

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

show abstract

Fabrication and test results of low‐voltage alternator with improved efficiency and reduced temperature rise using polyester nanocomposite insulation

Parthe,

Paramane,

Patil

et al. 2024

Polymer Composites

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This study reports the test results of a total of 16 low‐voltage (415 V) 15 and 30 kVA alternators manufactured using optimized polyester resin nanocomposites. These tests consist of the open‐circuit characteristics (OCC), short‐circuit characteristics (SCC), voltage regulation, and temperature rise tests. The test results obtained are reported in terms of efficiency, voltage regulation, OCC and SCC curves, and temperature rise in stator and rotor windings. The results show that the temperature rise in the windings reduced significantly and the efficiency improved marginally using polyester resin nanocomposite insulation. Finally, the calculations show that the reduction in temperature rise can double the life of the alternator. Notably, the manufactured alternators passed all the performance tests as per the test standards, without adversely affecting its performance. For the insulation design of any low‐voltage rotating machine utilizing polyester resin as its base insulation, a similar approach can thus be adopted.Highlights Fabrication of alternator prototype using polyester nanocomposite insulation. Alternator prototype fabrication using standard industry manufacturing process. Reduction in temperature rise in stator and rotor windings by 10 °C. Enhancement in alternator efficiency by 3%–4%. Polyester nanocomposite insulation doubles the service life of alternator.

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Preparation and performance study of the self-embrittle composite coatings for radioactive decontamination of surface layer of various materials

Wang,

Li,

Zhang

et al. 2023

J Coat Technol Res

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Synergistic Effect of Nano-Silica and Micro-Silica Fillers on the Rheological and Thermal Properties of Epoxy Resins

Cited by 4 publications

References 17 publications

Synergistic effect of positive temperature coefficient and thermally conductive micro‐nano fillers on electrical and thermal properties of epoxy resin

Synergistic effect of positive temperature coefficient and thermally conductive micro‐nano fillers on electrical and thermal properties of epoxy resin

Fabrication and test results of low‐voltage alternator with improved efficiency and reduced temperature rise using polyester nanocomposite insulation

Preparation and performance study of the self-embrittle composite coatings for radioactive decontamination of surface layer of various materials

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