Thermal conductivity of B-C-N and BN nanotubes

Thermal conductivity of B-C-N and BN nanotubes
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DOI:
10.1063/1.1914963
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发表时间:
2005-04-25
影响因子:
4
通讯作者:
Zettl, A
Zettl, A
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Chang, CW;Han, WQ;Zettl, A

文献摘要

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在室温至20 K温度范围内测量了硼碳氮(B-C-N)和氮化硼(BN)纳米管毡的热导率kappa(T)随温度的变化。对于这两种材料,kappa(T)随温度升高而增加,没有饱和迹象。我们采用一种分析方法来估计从B-C-N纳米管转化的BN纳米管的本征kappa(T),并发现在室温下多壁BN纳米管的kappa(T)可以与多壁碳纳米管的kappa(T)相当,并且如果使其同位素纯,则可能超过它。在低温下,kappa(T)的函数形式反映了尺寸限制。(c)2005年美国物理学会。
We have measured the temperature-dependent thermal conductivity kappa(T) of boron-carbon-nitride (B-C-N) and boron nitride (BN) nanotube mats between room temperature and 20 K. For both materials, kappa(T) increases with increasing temperature, with no sign of saturation. We employ an analysis method to estimate the intrinsic kappa(T) of BN nanotubes converted from B-C-N nanotubes, and find that at room temperature kappa(T) of a multiwalled BN nanotube can be comparable to that of a multiwalled carbon nanotube and may exceed it if made isotopically pure. At low temperature, the functional form of kappa(T) reflects dimensional confinement. (c) 2005 American Institute of Physics.