Replacing Copper Wires with Carbon Nanotube Wires in Electrical Transformers

Kurzepa, Lukasz; Łękawa-Raus, Agnieszka; Patmore, Jeff; Kozioł, Krzysztof

doi:10.1002/adfm.201302497

Cited by 70 publications

(49 citation statements)

References 10 publications

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“…Variations in the resistance of sensors based on CNT-Pt materials, i.e. growth in case of hydrogen dosing and decline when dosing nitrogen dioxide, are the result of interactions occurring among molecules of the gas supplied (hydrogen or nitrogen dioxide respectively), platinum nanoparticles and carbon nanotubes [44]. The hydrogen adsorbed on the surface of a CNT-Pt nanocomposite as a strongly reducing gas increases the number of free charge carriers in the carbon nanotubes-platinum nanoparticles system.…”

Section: Research Results and Discussionmentioning

confidence: 99%

“…Carbon nanotubes currently represent a precious material for electronic engineering. Investigations into the application of the nanotubes in an industrial scale have been conducted since discovering them, starting with modern and innovative manufacturing technologies of cables using the nanotubes [45], which are likely to replace conventional conductors, through carbon nanotube fibers connection technologies [44,46], ending with ultrasensitive selective electro-sensors which have a chance to revolutionise the market. The outcomes of the investigations presented in this article are highly utilitarian and can be applied directly in industrial conditions.…”

Section: Discussionmentioning

confidence: 99%

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MWCNT-Pt nanocomposite as the active element of harmful gas sensors

Dobrzańska-Danikiewicz¹,

Łukowiec²,

Wolany³

et al. 2016

Archives of Materials Science and Engineering

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Purpose: The goal of this paper is presentation of the variations in MWCNTs-Pt nanocomposite resistance which were examined in the presence of hydrogen with a rising concentration of, respectively, 1, 2, 3 and 4% H 2 as well as nitrogen dioxide with a rising concentration of, respectively, 20, 100, 200, 400 ppm of NO 2 . Design/methodology/approach: Variations in electrical conductivity for the MWCNTs-Pt composite placed, alternately, in the atmosphere of gas and in the atmosphere of selected gases, were measured with a measuring station equipped with precision and inert gas reducers, mass flow meters, filtration systems of gas mixture and the studied mixture's humidity and temperature control. An active layer of the transducer consisted of MWCNTs-Pt nanocomposite deposited thereon. All the measurements were carried out in the atmosphere of synthetic air (20% of O2 and 80% of N 2 ) at 22.5°C. Findings: It was found based on the results obtained that system resistance is rising as hydrogen concentration is rising in the atmospheric air. The results of analogous examinations of variations in MWCNTs-Pt nanocomposite resistance carried out for a varying concentration of nitrogen dioxide in the atmosphere of synthetic air are opposite, because lowering system resistance was noted along with a heightening concentration of NO 2 . The best results were achieved for the nanocomposite presented in the article having a 5% mass concentration of platinum and with uniformly dispersed Pt particles on the surface of carbon nanoparticles. Practical implications: The outcomes presented signify the selectiveness of the applied system consisting of carbon nanotubes decorated with platinum nanoparticles. It means that this material can be used as the active element of harmful gas sensors. Originality/value: A carbon-metal MWCNTs-Pt nanocomposite with special electrical properties was fabricated in the course of research works, whose originality is based on the appropriately selected composition and the specific morphology.

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Section: Research Results and Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

MWCNT-Pt nanocomposite as the active element of harmful gas sensors

Dobrzańska-Danikiewicz¹,

Łukowiec²,

Wolany³

et al. 2016

Archives of Materials Science and Engineering

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“…Applications of carbon conductors have been reported previously, but these experiments predominantly focus on the use of CNT materials in electric devices. Examples of these are the supply of current to an incandescent lamp [19], a 400 Hz small transformer with CNT windings [20]. Nanostructured carbon materials for electrical applications have also been tested in energy storages [10,21] and in solar cells [12].…”

Section: Emerging Alternatives From Nanomaterials Researchmentioning

confidence: 99%

Replacing Copper with New Carbon Nanomaterials in Electrical Machine Windings

Pyrhönen¹,

Montonen²,

Lindh³

et al. 2015

IREE

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“…This implies that CNTs can either be a metal, a semimetal or an insulator, depending on the structural parameters. Tremendous research activities have been carried out for the applications such as functional electrodes, electronic batteries, nanostructured transformers or sensors, etc . Remarkable electronic behaviors of CNTs were revealed such as the variable range hopping (VRH), weak localization, resonant tunneling phenomena, and universal conductance fluctuations, meanwhile the Coulomb interactions associated with a Coulomb gap was thought to be a dominant role in the electronic transport at low temperature.…”

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis of CNTs/Cu Nanocomposites and the Electronic Transport Properties

Wang

Javid

et al. 2019

Physica Status Solidi (b)

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Carbon nanotubes (CNTs)/Cu nanocomposite has been in situ fabricated by an arc‐discharge plasma approach. It is found that the herringbone‐bamboo‐shaped CNTs grow with assistance of Cu catalyst through an instantaneous vapor–liquid–solid (VSL) mechanism. Dielectric behavior dominates the electronic transport of CNTs/Cu nanocomposite, however, it is conductively modified by the metallic Cu nanoparticles, the residual catalyst exists in the nanocomposite. Temperature‐dependent resistivity of CNTs/Cu nanocomposite reveals that a transition from Mott–David (MD) variable range hopping (VRH) to Shklovskii–Efros (SE) VRH happens at the temperature of ≈10.7 K, which is further supported by theoretically calculated MD–SE crossover temperature TC = 10.6 K. The Coulomb gap ΔC = 0.14 meV is obtained for the CNTs/Cu nanocomposites, which is greatly significant to understand the conductive modification of CNTs by a metallic additive.

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Replacing Copper Wires with Carbon Nanotube Wires in Electrical Transformers

Cited by 70 publications

References 10 publications

MWCNT-Pt nanocomposite as the active element of harmful gas sensors

MWCNT-Pt nanocomposite as the active element of harmful gas sensors

Replacing Copper with New Carbon Nanomaterials in Electrical Machine Windings

In Situ Synthesis of CNTs/Cu Nanocomposites and the Electronic Transport Properties

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