Measurement of the Thermal Diffusivity of an Anisotropic Graphite Sheet Using a Laser-Heating AC Calorimetric Method
Measurement of the Thermal Diffusivity of an Anisotropic Graphite Sheet Using a Laser-Heating AC Calorimetric Method
复制标题
使用激光加热交流量热法测量各向异性石墨片的热扩散率
DOI：
10.1023/a:1006780208048
复制
发表时间：
2001
影响因子：
2.2
通讯作者：
Y. Nagasaka
中科院分区：
文献类型：
--
作者：
H. Nagano;H. Kato;A. Ohnishi;Y. Nagasaka
用激光加热交流量热法在30 ~ 350 K温度范围内测定了具有极高各向异性的石墨片的热扩散率。这种石墨片具有高的热扩散率和高的各向异性的特点，并且它只有100 μm厚。因此，难以应用常规AC技术。因此，我们提出了一种同时测量的方法，面内和面外的热扩散率，通过分析的三维热传导过程，其中包含的各向异性和热波反射的影响。通过对不锈钢、纯铜等各向同性材料的热扩散率测量进行验证，并将该方法应用于石墨片的各向异性热扩散率测量。
The thermal diffusivity of a graphite sheet having an extremely high anisotropy has been measured by a laser heating AC calorimetric method in the temperature range from 30 to 350 K. This graphite sheet has characteristics of high thermal diffusivity and high anisotropy, and it is only 100 μm thick. Thus, it is difficult to apply the conventional AC technique. Therefore, we propose a simultaneous measurement method for the in-plane and out-of-plane thermal diffusivities, by analyzing the three-dimensional heat conduction process, which contains the effects of anisotropy and thermal wave reflections. This method was verified by checking with thermal diffusivity measurements of isotropic materials such as stainless steel and pure copper and was then applied to the anisotropic thermal diffusivity measurement of the graphite sheet.