Thermal characterization of microscale conductive and nonconductive wires using transient electrothermal technique
Thermal characterization of microscale conductive and nonconductive wires using transient electrothermal technique
复制标题
DOI：
10.1063/1.2714679
复制
发表时间：
2007-03-15
影响因子：
3.2
通讯作者：
Wang, Tao
中科院分区：
文献类型：
--
作者：
Guo, Jiaqi;Wang, Xinwei;Wang, Tao
本文发展了一种暂态技术来表征一维导电和非导电微米级导线的热物理性质。在这种技术中，被测细线悬挂在两个电极之间。当将阶跃直流送入样品时，其温度会升高，并需要一定的时间才能达到稳定状态。通过测量导线上电压的变化来探测这种温度变化，而电压变化与电阻/温度变化直接相关。样品的温度演化历史可以用来确定其热扩散率。用25.4微米厚的铂丝作为参考样品，验证了该技术的有效性。测量的热扩散率与参考值之间有良好的一致性。应用这种瞬变电热技术，测量了单壁碳纳米管束和聚酯纤维的热扩散率。(C)2007年美国物理研究所。
In this paper, a transient technique is developed to characterize the thermophysical properties of one-dimensional conductive and nonconductive microscale wires. In this technique, the to-be-measured thin wire is suspended between two electrodes. When feeding a step dc to the sample, its temperature will increase and take a certain time to reach the steady state. This temperature evolution is probed by measuring the variation of voltage over the wire, which is directly related to resistance/temperature change. The temperature evolution history of the sample can be used to determine its thermal diffusivity. A 25.4 mu m thick platinum wire is used as the reference sample to verify this technique. Sound agreement is obtained between the measured thermal diffusivity and the reference value. Applying this transient electrothermal technique, the thermal diffusivities of single-wall carbon nanotube bundles and polyester fibers are measured. (c) 2007 American Institute of Physics.