The dielectric properties of epoxy/AlN composites |
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| Affiliation: | 1. Department of Electrical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan, ROC;2. Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung, Taiwan, ROC;3. Department of Electronic Engineering, Kao Yuan University, Kaohsiung, Taiwan, ROC;1. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China;2. State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China;3. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;1. Joining and Welding Research Institute, Osaka University, 11-1, Mihogaoka, Ibaraki, Osaka 567-0047, Japan;2. Shanghai Toyo Tanso., Ltd., No. 486 Xinfei Road, Songjiang, Shanghai 201611, P.R. China;3. Advanced Carbon Technology Center, Toyo Tanso. Co., Ltd. 5-7-12, Takeshima, Nishiyodogawa-Ku, Osaka 555-0011, Japan;1. School of Material Science and Engineering, University of Jinan, Jinan 250022, China;2. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, China;3. Shandong Industrial Ceramics Research & Design Institute Co., Ltd, Zibo 255000, China;4. School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;5. Shandong Green Polymer Materials Co. Ltd., Tai''an 271600, China;1. Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, No. 17923 Jingshi Road, Jinan 250061, China;2. Shandong Non-metallic Materials Research Institute, No. 3 Tianjia Zhuang East Road, Jinan 250031, China;1. School of Mechanical Engineering, University of Science and Technology Beijing, No. 30, Xueyuan Road, Haidian District, Beijing 100083, China;2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | In this paper, AlN ceramic powder is chosen to be mixed with epoxy to form epoxy/AlN composites, the effects of the content of AlN filler on the physical and dielectric properties of epoxy/AlN composites are developed. From the SEM observation, the particles of self-synthesized AlN powder, obtained by using combustion method, is less uniformity and the average particle size is about 3.12 μm. Only the AlN phase can be detected in the XRD patterns of the epoxy/AlN composites. The more AlN powder is mixed with epoxy, the higher crystal intensity of AlN phase will exist in the XRD patterns. As the content of AlN powder in the epoxy/AlN composites increases from 5 to 40 wt.%, the dielectric constant increases from 6.52 to 7.28 (measured at 1 MHz). The loss tangent of epoxy/AlN composites is slightly increased as the measured frequency increases. Moreover, the epoxy/AlN composites in this investigation show less pores as compared to other literatures. The results indicate that the fabrication process has an apparent effect on the decrease of porosities, and the composites with a low porosity will lead to a low loss tangent. |
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