Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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Materials Map under construction

The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (4/4 displayed)

  • 2022Mechanical, Corrosion, and Ion Release Studies of Ti-34Nb-6Sn Alloy with Comparable to the Bone Elastic Modulus by Powder Metallurgy Method20citations
  • 2019Electroconductivity of Al2O3/graphene nanocomposite processed by SPS techniquecitations
  • 2018European Powder Metallurgy Congress and Exhibition, Euro PM 2018, Bilbao (Spain)citations
  • 2017Investigation of deformation behavior and fracture of ceramic coatings by the acoustic emission method1citations

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Chart of shared publication
Leal-Bayerlein, Daniel
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Amigó, Vicente
1 / 11 shared
Garcia-Alves, Ana
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Carpio Cobo, Pablo
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Salvador Moya, María Dolores
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Borrell, A.
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Stolyarov, V. V.
1 / 6 shared
Sánchez-Vilches, Enrique
1 / 31 shared
Klyatskina, Elizabeta
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2019
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Co-Authors (by relevance)

  • Leal-Bayerlein, Daniel
  • Amigó, Vicente
  • Garcia-Alves, Ana
  • Carpio Cobo, Pablo
  • Salvador Moya, María Dolores
  • Borrell, A.
  • Stolyarov, V. V.
  • Sánchez-Vilches, Enrique
  • Klyatskina, Elizabeta
OrganizationsLocationPeople

article

Electroconductivity of Al2O3/graphene nanocomposite processed by SPS technique

  • Segovia López, Francisco
Abstract

<jats:title>Abstract</jats:title><jats:p>Electrical conductivity (σ), relative dielectric permittivity (ε<jats:sub>r</jats:sub>) and dissipation factor (<jats:italic>D</jats:italic>) measured in graphene-alumina composites. Samples obtained by plasma spark sintering (SPS) from a mixture of raw powders: δ-alumina (36 nm average particle size) and graphene flakes (3 nm thickness and 2–3 μm length). Graphene content in samples was 0, 1 and 2% by weight. The study carried out for frequencies from 50 Hz to 100 kHz. Both c and ε<jats:sub>r</jats:sub> were higher for Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>–2% graphene: up to 90 μS/m and 19 respectively; while alumina with 1% graphene showed similar values to the pure alumina samples: 50 μS/m to electrical conductivity and 16 to relative permittivity. The dissipation factor was similar in the three materials tested. <jats:italic>D</jats:italic> increased with the frequency, reaching high values (0.7) at 100 kHz. Composites with 1 and 2% graphene content showed a dissimilar dielectric behavior with the frequency. Alumina reflected a classical behavior of the permittivity dependence with the frequency. Graphene composites also show the same behavior at frequencies above 100 Hz. Below this frequency, the presence of graphene increases the relative permittivity to exceed that from pure alumina. The graphene content leads to rise of relative permittivity, which means easier polarizability.</jats:p>

Topics
  • nanocomposite
  • dielectric constant
  • electrical conductivity
  • sintering
  • dissipation factor