›› 2014, Vol. 23 ›› Issue (10): 107307-107307.doi: 10.1088/1674-1056/23/10/107307
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
郑鲲a c, 祝捷b, 马永梅a, 唐大伟b, 王佛松a
Zheng Kun (郑鲲)a c, Zhu Jie (祝捷)b, Ma Yong-Mei (马永梅)a, Tang Da-Wei (唐大伟)b, Wang Fo-Song (王佛松)a
摘要: To improve the thermal conductivity of polymeric composites, the numerous interfacial thermal resistance (ITR) inside is usually considered as a bottle neck, but the direct measurement of the ITR is hardly reported. In this paper, a sandwich structure which consists of transducer/high density polyethylene (HDPE)/sapphire is prepared to study the interface characteristics. Then, the ITRs between HDPE and sapphire of two samples with different HDPE thickness values are measured by time-domain thermoreflectance (TDTR) method and the results are ~ 2×10-7 m2· K· W-1. Furthermore, a model is used to evaluate the importance of ITR for the thermal conductivity of composites. The model's analysis indicates that reducing the ITR is an effective way of improving the thermal conductivity of composites. These results will provide valuable guidance for the design and manufacture of polymer-based thermally conductive materials.
中图分类号: (Nanoscale contacts)