High permittivity ceramics loaded silicone elastomer composites for flexible electronics applications |
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| Affiliation: | 1. Materials Science and Technology Division, CSIR NIIST, Trivandrum 695019, India;2. Microelectronics Research Unit, University of Oulu, Oulu 90014, Finland;1. Department of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China;2. Beijing Key Lab of Special Elastomeric Composite Materials, Beijing Institute of Petrochemical Technology Beijing 102617, China;1. School of Materials Science and Engineering, South China University of Technology, Guangzhou 510641, China;2. State Key Laboratory of High Performance Ceramics and Super?ne Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China;1. School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510641, PR China;2. State Key Laboratory of High Performance Ceramics and Super?ne Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China;1. Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China;2. Center for Advanced Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China;3. Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin, NT, Hong Kong, China;1. School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, PR China;2. Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, PR China;3. Department of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA;4. Institute of Marine Materials Science and Engineering, Shanghai Maritime University, Shanghai 201306, PR China |
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| Abstract: | The dielectric properties of silicone elastomer composites are important in designing flexible electronic devices. The recent explosive growth in wireless communication, automotive and biomedical applications increases the demand for flexible dielectric materials. However, it is very difficult to identify a homogeneous material which possesses these desired properties. Flexible silicone rubber- ceramic composites based BaTiO3 (BT), SrTiO3 (ST) and Ca(1?x)Nd(2x/3)TiO3 (CNT) ceramic fillers have been prepared. The relative permittivity, thermal conductivity and water absorption increase whereas the coefficient of linear thermal expansion decrease as the volume fraction of filler increases. In the case of dielectric loss; a decreasing trend is shown by SR-ST and SR-CNT composites with filler volume fraction whereas SR-BT composites show a reverse trend since BT is a lossy material. The composites have εr in the range 3–14 in the microwave frequency range. The composites with high filler loading are suitable candidates for core of flexible dielectric waveguide and embedded capacitor applications and the composites with ST and CNT are suitable for cladding of flexible dielectric waveguide and also for microwave substrate applications |
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| Keywords: | A: Hot pressing B: Composites C: Dielectric properties E: Substrate |
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