Effects of LiF addition on microstructure and dielectric properties of CaCu3Ti4O12 ceramics |
| |
| Affiliation: | 1. INFLPR – National Institute for Laser, Plasma and Radiation Physics, Laser Department, Bvd. Atomistilor, Nr. 409, 077125 Măgurele (Ilfov), Bucharest, Romania;2. EaStCHEM Research School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST Fife, Scotland, United Kingdom;1. q-SpinTech and Nanomaterials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, Maharashtra, India;2. Department of Biological and Environmental Science, College of Life Science and Biotechnology, Dongguk University, Seoul 100-715, Republic of Korea;3. Green Nanotechnology Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416004, Maharashtra, India;4. UGC-DAE Consortium for Scientific Research (CSR), Mumbai Center, BARC Campus, Mumbai, Maharashtra, India;5. Thin Film Physics Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, Maharashtra, India;1. Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, PR China;2. Laboratory of Chemical Analysis Elaboration and Materials, Engineering (LEACIM), Université de La Rochelle, Avenue Michel Crépeau, 17042 La Rochelle, Cedex 01, France;1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, PR China;2. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, PR China;1. Key Lab of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, PR China;2. College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, PR China;3. College of Physics and Electrical Engineering, Anyang Normal University, Anyang 455000, PR China |
| |
| Abstract: | The effects of small amounts of lithium fluoride sintering aid on the microstructure and dielectric properties of CaCu3Ti4O12 (CCTO) ceramics were investigated. CCTO polycrystalline ceramics with 0.5 and 1.0 mol% LiF, and without additive were prepared by solid state synthesis. Good densification (>90% of the theoretical density) was obtained for all prepared materials. Specimens without the sintering aid and sintered at 1090 °C exhibit secondary phases as an outcome of the decomposition reaction. The mean grain size is controlled by the amount of LiF in specimens containing the additive. Impedance spectroscopy measurements on CaCu3Ti4O12 ceramics evidence the electrically heterogeneous nature of this material consisting of semiconductor grains along with insulating grain boundaries. The activation energy for grain boundary conduction is lower for specimens prepared with the additive, and the electric permittivity reached 53,000 for 0.5 mol% LiF containing CCTO. |
| |
| Keywords: | A Sintering C Dielectric properties D Perovskites E Capacitors |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
