Nanostructured insulators – A review of nanotechnology concepts for outdoor ceramic insulators

Contreras, José Enciso; Rodríguez, Edén

doi:10.1016/j.ceramint.2017.04.105

Cited by 51 publications

(14 citation statements)

References 43 publications

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“…In non-ceramic and porcelain insulators, the contamination process is the same, but non-ceramic insulators collect less pollution than ceramic insulators [6,11]. Recently, with nanotechnology and nanoscience, new materials with innovative properties have been proposed for several applications [12][13][14]. A wide range of such monitoring devices and techniques has been developed over the years.…”

Section: Background On Insulatorsmentioning

confidence: 99%

Lessons to Learn from Post-Installation Pollution Levels Assessment of Some Distribution Insulators

et al. 2020

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Among the main causes of outdoor insulation failures is their poor specifications in terms of leakage distances. This happens when the selected criteria are unable to cope with all the stresses imposed by the changes in environmental pollutions. Therefore, it is important for utilities to fully understand the actual pollution characteristics of the service environment in which the insulators are operating. In this paper, the pollution severity and performance of some 13.2 kV ceramic insulators, sampled in different areas of a Canadian aluminum factory, are assessed. The investigations were performed taking into account the influence of air humidity. Various characteristics were investigated to assess the pollution levels of the insulators, such as equivalent salt deposit density (ESDD) and non-soluble deposit density (NSDD), surface resistance, and leakage current characteristics (density, 3rd harmonic amplitude, and phase). It was witnessed that the insulators, collected around the factory, were much more polluted in comparison to the initial expectation. The pollution level should not be considered static due to the environmental parameters’ dynamics. Lessons to learn: the reliability of an electrical grid is dependent on components whose own reliability is strongly affected by external factors, of which there is often a poor awareness. If care is not taken to re-evaluate the post-installation pollution levels of the insulators, the light may simply turn out!

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Section: Background On Insulatorsmentioning

confidence: 99%

Lessons to Learn from Post-Installation Pollution Levels Assessment of Some Distribution Insulators

et al. 2020

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“…In recent decades, nanomaterials have been increasingly receiving attention as they could have various potential applications, such as in industry, biomaterials, electronics, and material science, owing to their superior chemical, physical, and biological properties [1,2]. Material science can be classified into polymers, metals, ceramics, composites, and semiconductor materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of CaCO₃ nanoparticles on the microstructure and fracture toughness of ceramic nanocomposites

Hakamy

2020

Journal of Taibah University for Science

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This study investigated the effect of using calcium carbonate (CaCO 3) nanoparticles on the microstructural properties, flexural strength and fracture toughness of ceramic nanomaterials. The flexural strength and fracture toughness were evaluated for CaCO 3 nanoparticle contents of 1%, 2%, and 3% by weight of cement powder. The microstructural analyses from X-ray diffraction showed that nano-CaCO 3 improved the microstructure of nanocomposites because it reduces the tricalcium silicate and dicalcium silicate peaks and increases the calcium silicate hydrate products. Moreover, the results showed that the nanocomposites with 1 wt% nano-CaCO 3 exhibited the maximum flexural strength and fracture toughness compared to the other composites owing to the filler and nucleation effect of nano-CaCO 3. In addition, nano-CaCO 3 could resist the unstable micro-crack propagation in cement nanocomposites by filling the micro-cracks and voids. Future applications in synthesis or steel fiber-reinforced concrete or ceramic nanocomposites could benefit from the use of the analyses presented in this study.

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“…In recent years, development of nanotechnology and nanoscience has allowed the improvement and creation of new materials with unique properties [14]. In nanosized particles, unique luminescence properties have been revealed, which might be quite different from their bulk counterparts [15].…”

Section: Introductionmentioning

confidence: 99%

Enhanced luminescence in rare-earth-free fast-sintering glass-ceramic

Fuertes

Fernández

Enríquez

2019

Optica

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One of the major challenges pursued in the luminescent materials community is to develop rare-earth-free phosphors in order to reduce the use of rare-earth elements, because of the lack of their availability and the environmental problems derived from their mining and processing. In this work, a rare-earth-free glass-ceramic-based phosphor with high photoluminescence has been designed. This novel phosphor rich in Na-rich plagioclase feldspar crystallizations presents high crystallinity, ∼94%, and a dual micro-nanostructure provided by a fast-sintering processing route. Structural disorder in Si-Al distribution favors formation of luminescent centers in the glass-ceramic material, which results in an enhancement of both the UV-blue and the red luminescence regarding natural feldspars, 1 order of magnitude and 6 times, respectively. A microstructural and structural study by means of x-ray diffraction, Raman spectroscopy, scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, cathodoluminescence, and nuclear magnetic resonance evidence the important role of composition in the alteration of Si-Al ordering schemes. A strong correlation between Si-Al disorder and the presence of active luminescent centers is corroborated. Our research shows a sustainable, cost-effective, innovative, and scalable material that may be considered as an alternative to rare-earth phosphors for applications such as security markers or light-emitting glasses. This novel family of rare-earth-free glass-ceramics opens a new gate through structural tailoring to enhance and tune the intrinsic luminescent emissions displayed for relevant future optical applications.

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Nanostructured insulators – A review of nanotechnology concepts for outdoor ceramic insulators

Cited by 51 publications

References 43 publications

Lessons to Learn from Post-Installation Pollution Levels Assessment of Some Distribution Insulators

Lessons to Learn from Post-Installation Pollution Levels Assessment of Some Distribution Insulators

Effect of CaCO₃ nanoparticles on the microstructure and fracture toughness of ceramic nanocomposites

Enhanced luminescence in rare-earth-free fast-sintering glass-ceramic

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Nanostructured insulators – A review of nanotechnology concepts for outdoor ceramic insulators

Cited by 51 publications

References 43 publications

Lessons to Learn from Post-Installation Pollution Levels Assessment of Some Distribution Insulators

Lessons to Learn from Post-Installation Pollution Levels Assessment of Some Distribution Insulators

Effect of CaCO3 nanoparticles on the microstructure and fracture toughness of ceramic nanocomposites

Enhanced luminescence in rare-earth-free fast-sintering glass-ceramic

Contact Info

Product

Resources

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Effect of CaCO₃ nanoparticles on the microstructure and fracture toughness of ceramic nanocomposites