Nano-Al2O3/PANI composites with high negative permittivity |
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| Affiliation: | 1. School of Materials Science and Engineering, Tongji University, Shanghai 201804, PR China;2. Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Education of Ministry, Shanghai 201804, PR China;1. School of Materials Science and Engineering, Tongji University, Shanghai, 201804, PR China;2. Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Education of Ministry, Shanghai, 201804, PR 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. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, No. 17923 Jingshi Road, Jinan 250061, China;2. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, No. 4, Section 2, North Jianshe Road, Chengdu 610054, China;3. Shandong Non-metallic Materials Research Institute, No. 3 Tianjia Zhuang East Road, Jinan 250031, China;1. Institute of Advanced Electrical Materials, Qingdao University of Science and Technology, Qingdao, 266042, China;2. College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China;3. Department of Optical Science and Engineering, Fudan University, Shanghai, 200433, China;4. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan, 250061, China;1. College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai, 201306, China;2. State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China;1. College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China;2. Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, China;3. Department of Materials Science and Engineering, National University of Singapore, 117574, Singapore |
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| Abstract: | Polyaniline (PANI) composites filled with ferroferric oxide and barium titanate were discovered to have metamaterial characteristics in recent years. In this paper, based on micron-Al2O3/PANI composites with negative permittivity, the dielectric properties of nano-Al2O3/PANI composites were studied. Nano-Al2O3/PANI composites had negative permittivity, which was considerably higher than that of PANI and micron-Al2O3/PANI composites. The higher negative permittivity was caused by the better dispersibility of nano-Al2O3, resulting in the enlargement of polarization voltage on a greater range of PANI molecular chain. Moreover, nano-Al2O3/PANI composite with 5 wt% nano-Al2O3 has the largest negative permittivity (−2.24 × 106) that has not been reported so far in oxide/PANI composites. |
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| Keywords: | Negative permittivity Polyaniline Nano composites |
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