Enhanced giant dielectric response in Mg-substituted CaCu3Ti4O12 ceramics |
| |
| Authors: | L Ni XM Chen |
| |
| Institution: | 1. State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;2. Xi’an Thermal Power Research Institute Co., Ltd., Xi’an, Shaanxi 710054, China;1. NanoTechProm Ltd., Saratov, Russia;2. Physico-Technical Institute of the Russian Academy of Science, St. Petersburg, Russia;3. Saratov State Technical University, Saratov, Russia;1. College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, People?s Republic of China;2. Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, People?s Republic of China;1. Materials Science and Nanotechnology Program, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;2. National Metal and Materials Technology Center (MTEC), Thailand Science Park, Pathumthani 12120, Thailand;3. Integrated Nanotechnology Research Center (INRC), Khon Kaen University, Khon Kaen 40002, Thailand;4. Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen 40002, Thailand;5. School of Physics, Institute of Science, Suranaree University, Nakhon Ratchasima 30000, Thailand |
| |
| Abstract: | Effects of Mg-substitution on the giant dielectric response in CaCu3Ti4O12 ceramics were investigated and discussed. A significantly enhanced giant dielectric response was obtained in Ca(Cu1?xMgx)3Ti4O12 ceramics, and the dielectric constant step increased with increasing Mg-substitution content. The results of X-ray photoelectron analysis confirmed the obvious increase of Ti3+/Ti4+ ratio, and the enhanced giant dielectric response should originate from the corresponding modification of the mixed-valent structure. The present results have great scientific significance in deepening the understanding on the origin of giant dielectric response and modulating the giant dielectric constant step in CaCu3Ti4O12. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
