Enhanced dielectric performance of (Ag1/4Nb3/4)0.01Ti0.99O2 ceramic prepared by a wet-chemistry method |
| |
| Affiliation: | 1. School of Natural Sciences and Mathematics, Ural Federal University, Ekaterinburg 620000, Russia;2. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, Xi’an Jiaotong University, Xi’an 710049, China;1. Key Laboratory for Macromolecular Science of Shaanxi Province, Shaanxi Key Laboratory for Advanced Energy Devices, School of Materials Science and Engineering, Shaanxi Normal University, Xi''an, 710062, Shaanxi, China;2. School of Physics and Information Technology, Shaanxi Normal University, Xi''an, 710062, Shaanxi, China |
| |
| Abstract: | The (Ag1/4Nb3/4)0.01Ti0.99O2 ceramic, with ultra-high permittivity and relatively low dielectric loss, was synthetized by a sol-seed method. Significant influences of Ti concentration on the phase structure, microstructure, and dielectric performances were observed. By optimizing the Ti concentration, high active powders and effectively controlled grain uniformity were obtained, which is great benefit for depressing the calcining temperature. The sample shows an ultra-high permittivity (εr ~43271 at 1 kHz) and relatively low dielectric loss (tanδ ~ 0.048 at 1 kHz) at room temperature, meanwhile, the temperature coefficient of εr keeps in ±15% within the temperature range from −78 to 130°C, fortunately for X7R capacitor. Based on the XPS results, the defect cluster structure was revealed and giant permittivity is closely associated with the electron pinned defect dipole. |
| |
| Keywords: | Sol-seed method Ti concentrations Dielectric properties |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
