Electrical and thermal conductivity of CNT/alumina‐nanocomposite ceramics

In the present work, carbon nanotube (CNT)‐reinforced alumina nanocomposite ceramics were investigated about their electrical and, for the first time in such detail, thermal conductivity. Therefore, two different alumina powders with varying CNT‐contents were processed by pressureless sintering and...

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Bibliographic Details
Published in:International journal of ceramic engineering & science 2023-01, Vol.5 (1), p.n/a
Main Authors: Bechteler, Christian, Machuj, Lisa, Hebendanz, Kilian, Rübling, Achim, Girmscheid, Ralf, Kühl, Hannes
Format: Article
Language:English
Subjects:
Alumina
Aluminum oxide
Carbon
carbon nanotube
Carbon nanotubes
Ceramics
Crystal structure
electrical properties
Electrical resistivity
Grain boundaries
Grain size
Grain structure
Heat conductivity
Heat transfer
Hot pressing
Influence
Investigations
Loose powder sintering
Measurement techniques
Mechanical properties
nanocomposite
Nanocomposites
Percolation
Porosity
Porous materials
Sintering (powder metallurgy)
Thermal conductivity
thermal properties
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Summary:In the present work, carbon nanotube (CNT)‐reinforced alumina nanocomposite ceramics were investigated about their electrical and, for the first time in such detail, thermal conductivity. Therefore, two different alumina powders with varying CNT‐contents were processed by pressureless sintering and hot pressing to achieve CNT/alumina composite ceramics with varying porosity and CNT‐content between 0 and 5 wt.% CNTs. A significant influence of the grain size on percolation threshold of the electrical conductivity was detected. The coarser CT 3000 SG‐based ceramic showed a threshold of
ISSN:2578-3270
2578-3270
DOI:10.1002/ces2.10167