Accurate determination of anisotropic thermal conductivity for ultrathin composite film  

作　　者：Qiu-Hao Zhu Jing-Song Peng Xiao Guo Ru-Xuan Zhang Lei Jiang Qun-Feng Cheng Wen-Jie Liang 朱秋毫;彭景凇;郭潇;张如轩;江雷;程群峰;梁文杰(Beijing National Center for Condensed Matter Physics,Beijing Key Laboratory for Nanomaterials and Nanodevices,Institute of Physics,Chinese Academy of Sciences(CAS),Beijing 100190,China;CAS Center of Excellence in Topological Quantum Computation and School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China;School of Chemistry,Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education,Beijing Advanced Innovation Center for Biomedical Engineering,Beihang University,Beijing 100191,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]Beijing National Center for Condensed Matter Physics,Beijing Key Laboratory for Nanomaterials and Nanodevices,Institute of Physics,Chinese Academy of Sciences(CAS),Beijing 100190,China [2]CAS Center of Excellence in Topological Quantum Computation and School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100190,China [3]School of Chemistry,Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education,Beijing Advanced Innovation Center for Biomedical Engineering,Beihang University,Beijing 100191,China [4]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Chinese Physics B》2022年第10期572-577,共6页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China (Grant No. 2016YFA0200800);the Strategic Priority Research Program of Chinese Academy of Sciences (Grant Nos. XDB30000000 and XDB07030100);the Sinopec Innovation Scheme (A-527);the National Key Research and Development Program of China (Grant No. 2021YFA0715700);the National Science Fund for Distinguished Young Scholars, China (Grant No. 52125302)。

摘　　要：Highly anisotropic thermal conductive materials are of significance in thermal management applications. However,accurate determination of ultrathin composite thermal properties is a daunting task due to the tiny thermal conductance,severely hindering the further exploration of novel efficient thermal management materials, especially for size-confined environments. In this work, by utilizing a hybrid measuring method, we demonstrate an accurate determination of thermal properties for montmorillonite/reduced graphene oxide(MMT/r GO) composite film with a thickness range from 0.2 μm to2 μm. The in-plane thermal conductivity measurement is realized by one-dimensional(1D) steady-state heat conduction approach while the cross-plane one is achieved via a modified 3ω method. As-measured thermal conductivity results are cross-checked with different methods and known materials, revealing the high measurement accuracy. A high anisotropic ratio of 60.5, independent of composite thickness, is observed in our measurements, further ensuring the negligible measurement error. Notably, our work develops an effective approach to the determination of ultrathin composite thermal conductivity, which may promote the development of ultrathin composites for potential thermal-related applications.

关 键 词：ULTRATHIN composite film thermal conductivity anisotropic ratio 

分 类 号：TB383.2[一般工业技术—材料科学与工程]