Abstract
Interfacial thermal transport of multi-walled carbon nanotubes (MWNTs) is investigated by using bulk pellet specimens. Steady-state conduction method gives thermal conductivity of 1 to 4 W/mK for the pellets with mass density from 0.2 to 0.35 g/cm3. This low thermal conductivity is due to the thermal boundary conductance between the nanotubes. Computational analysis is conducted for the pellet modeled as a random network of spherocylinders (SCs) and calculated dependency of thermal conductivity on pellet density shows good agreement with experimental data when we treat non-uniform SCs. By comparing the experimental and computational results, the thermal boundary conductance between two MWNTs can be taken as 1.5×10-8 W/K. This result agrees well with the reported data obtained by individual measurement, which suggests this simple method is applicable to probe the interfacial thermal phenomena of nanomaterials. An improved scaling law, k ∝ ρ2.14, for thermal conductivity of MWNTs aggregations is also proposed and discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 190-198 |
| Number of pages | 9 |
| Journal | Journal of Thermal Science and Technology |
| Volume | 7 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2012 |
| Externally published | Yes |
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Keywords
- Carbon nanotubes
- Thermal boundary conductance
- Thermal conductivity
ASJC Scopus subject areas
- Materials Science(all)
- Instrumentation
- Atomic and Molecular Physics, and Optics
- Engineering (miscellaneous)
Cite this
Thermal boundary conductance between multi-walled carbon nanotubes. / Yamada, Yutaka; Nishiyama, Takashi; Yasuhara, Takahiro; Takahashi, Koji.
In: Journal of Thermal Science and Technology, Vol. 7, No. 1, 2012, p. 190-198.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Thermal boundary conductance between multi-walled carbon nanotubes
AU - Yamada, Yutaka
AU - Nishiyama, Takashi
AU - Yasuhara, Takahiro
AU - Takahashi, Koji
PY - 2012
Y1 - 2012
N2 - Interfacial thermal transport of multi-walled carbon nanotubes (MWNTs) is investigated by using bulk pellet specimens. Steady-state conduction method gives thermal conductivity of 1 to 4 W/mK for the pellets with mass density from 0.2 to 0.35 g/cm3. This low thermal conductivity is due to the thermal boundary conductance between the nanotubes. Computational analysis is conducted for the pellet modeled as a random network of spherocylinders (SCs) and calculated dependency of thermal conductivity on pellet density shows good agreement with experimental data when we treat non-uniform SCs. By comparing the experimental and computational results, the thermal boundary conductance between two MWNTs can be taken as 1.5×10-8 W/K. This result agrees well with the reported data obtained by individual measurement, which suggests this simple method is applicable to probe the interfacial thermal phenomena of nanomaterials. An improved scaling law, k ∝ ρ2.14, for thermal conductivity of MWNTs aggregations is also proposed and discussed.
AB - Interfacial thermal transport of multi-walled carbon nanotubes (MWNTs) is investigated by using bulk pellet specimens. Steady-state conduction method gives thermal conductivity of 1 to 4 W/mK for the pellets with mass density from 0.2 to 0.35 g/cm3. This low thermal conductivity is due to the thermal boundary conductance between the nanotubes. Computational analysis is conducted for the pellet modeled as a random network of spherocylinders (SCs) and calculated dependency of thermal conductivity on pellet density shows good agreement with experimental data when we treat non-uniform SCs. By comparing the experimental and computational results, the thermal boundary conductance between two MWNTs can be taken as 1.5×10-8 W/K. This result agrees well with the reported data obtained by individual measurement, which suggests this simple method is applicable to probe the interfacial thermal phenomena of nanomaterials. An improved scaling law, k ∝ ρ2.14, for thermal conductivity of MWNTs aggregations is also proposed and discussed.
KW - Carbon nanotubes
KW - Thermal boundary conductance
KW - Thermal conductivity
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U2 - 10.1299/jtst.7.190
DO - 10.1299/jtst.7.190
M3 - Article
VL - 7
SP - 190
EP - 198
JO - Journal of Thermal Science and Technology
JF - Journal of Thermal Science and Technology
SN - 1880-5566
IS - 1
ER -