Multi-phase coexistence and temperature-stable dielectric properties in BaTiO3/ZnO composite ceramics |
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| Affiliation: | 1. Laboratory of Thin Film Techniques and Optical Test, School of Photoelectrical Engineering, Xi’an Technological University, Xi’an 710032, PR China;2. Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology, School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, PR China;1. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;2. Materials R&D Department, Beijing Yuanliu Hongyuan Electronic Technology Company, Ltd., Beijing 102600, China;1. Department of Mechanical and Electronic Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, China;2. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;3. School of Materials Science and Engineering, University of Jinan, Jinan 250022, China |
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| Abstract: | BaTiO3:100xZnO composite ceramics with different ZnO particle sizes were prepared by using a conventional solid-state method. Phase constitution, microstructure and dielectric properties of BaTiO3:100xZnO composite ceramics are investigated. Compared to micrometer scaled ZnO particles, nanometer scaled ZnO particles tend to agglomerate at lower ZnO contents in the BaTiO3:100xZnO composite ceramics. The introduction of ZnO in BaTiO3 leads to the reduction of grain size, decrease of the tetragonality and shift of phase transition temperature. The optimum composition is BaTiO3 with 20 wt. % nanometer scaled ZnO particles, which has stable permittivity and low dielectric loss from -100 to 160 °C. The stable dielectric properties are proposed to be beneficiated from the stress induced multi-phase coexistence. |
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| Keywords: | MLCC Composites Stress |
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