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| Content Provider | Springer Nature Link |
|---|---|
| Author | Kumar, Ranjit Zulfequar, M. Senguttuvan, T. D. |
| Copyright Year | 2016 |
| Abstract | A giant dielectric constant CaCu$_{3}$Ti$_{4}$O$_{12}$ ceramic was prepared by solid-state reaction route. Powders were spark plasma sintered at 1050 °C for 30 min. Rietveld refined XRD pattern reveals the formation of pure phase cubic perovskite CCTO. The dielectric properties were characterized in a broad frequency range of 10 Hz–8 MHz at temperatures 20–120 °C. The grain size of sintered pellets was found in range of 12–15 μm. Impedance spectroscopic analysis shows that the observed semicircle in the Cole–Cole plot was associated with grain boundary relaxation effect. This study reveals that there is an evidence of internal resistive barrier which responsible for a giant dielectric constant in CaCu$_{3}$Ti$_{4}$O$_{12}$ ceramic. An Arrhenius temperature dependent relaxation effect was observed in grain boundary. Using the characteristic frequency of relaxation peak, grain boundary capacitance was calculated to be 0.27 μF. It was found that on increasing the temperature, the resistance of grain boundaries was decreased rapidly as compared to that of the grains. The activation energy of grain boundary was calculated to be 0.165 eV. |
| Starting Page | 5233 |
| Ending Page | 5237 |
| Page Count | 5 |
| File Format | |
| ISSN | 09574522 |
| Journal | Journal of Materials Science: Materials in Electronics |
| Volume Number | 27 |
| Issue Number | 5 |
| e-ISSN | 1573482X |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2016-02-01 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Optical and Electronic Materials Characterization and Evaluation of Materials |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Biomaterials Biophysics Condensed Matter Physics Electronic, Optical and Magnetic Materials Bioengineering Electrical and Electronic Engineering Biomedical Engineering |
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