Effect of the dispersibility of BaTiO3 nanoparticles in BaTiO3/polyimide composites on the dielectric properties |
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| Affiliation: | 1. Optoelectronic Materials Research Center, Korea Institute of Science and Technology, P.O. Box 131 Cheongryang, Seoul 130-650, Republic of Korea;2. Department of Chemical Engineering, Hanyang University, Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea;1. Institute for Advanced Materials & Technology, University of Science & Technology Beijing, Beijing 100083, China;2. Beijing Key Lab for Advanced Energy Materials and Technologies, Beijing 100083, China;3. State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;1. International and Inter University Centre for Nanoscience and Nanotechnology, Mahatma Gandhi University, Kottayam 686560, Kerala, India;2. Department of Physics, Osmania University, Hyderabad 500007, India;3. Department of Physics, Mekelle University, Mekelle, Ethiopia;4. School of Chemical Sciences, Mahatma Gandhi University, Kottayam 686560, Kerala, India;5. School of Pure and Applied Physics, Mahatma Gandhi University, Kottayam 686560, Kerala, India;1. State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China;2. Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China;3. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;1. Department of Physics, Govt. Science College, Bengaluru, 560 001, India;2. Research and Development Center, Bharathiar University, Coimbatore, 641046, India;3. Prof. C.N.R. Rao Centre for Advanced Materials, Tumakuru University, Tumakuru, 572103, India;1. Institute for Advanced Materials and Technology, University of Science & Technology Beijing, Beijing 100083, China;2. State Key Lab of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;3. Centre for Flexible Electronics Technology, Tsinghua University, Beijing 100084, China |
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| Abstract: | We have investigated the effect of coupling agents with different organic moiety on the dielectric properties of polyimide/BaTiO3 (70 nm) composite films. INAAT (isopropyl tris(N-amino-ethyl aminoethyl)titanate, KR 44) and APTS (3-amino-propyl-triethoxysilane) were used as coupling agents, respectively, for homogeneous dispersion of BaTiO3 particles into a polyimide matrix. The composite films were prepared by pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA)-based polyimide. Enhanced dispersion of BaTiO3 particles was obtained by the use of INAAT with more organic moiety compared to that afforded by APTS. The polyimide composite with BaTiO3 particles (BaTiO3 content at 50 vol.%) treated by INAAT showed an increased dielectric constant of 19.03 while retaining an appropriate dielectric loss of 0.0109, as compared to the dielectric constant (14.64) of polyimide/APTS-treated BaTiO3 composite. The results of this work demonstrate the potential use of an INAAT coupling agent with more organo functional groups for obtaining enhanced dielectric properties in a polyimide/BaTiO3 composite for application in an embedded capacitor. |
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