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| Content Provider | Springer Nature Link |
|---|---|
| Author | Jiang, J. Zhang, T. J. Zhang, B. S. Mao, H. |
| Copyright Year | 2007 |
| Abstract | Complex impedance spectra of BST ceramics were measured at different temperatures, and the results reveal that all the centers of the semicircles lie below the real axis, and the area of the semicircles decreases with the increasing temperature. Activation energy of grains and grain boundaries was obtained from a classical Arrhenius relation. The results show that the activation energy of grains and grain boundaries of undoped BST ceramics is 0.98 and 0.97 eV, respectively. After doping B$_{2}$O$_{3}$–SiO$_{2}$, the activation energy of grain increased to 1.12 eV, which was due to B$_{2}$O$_{3}$–SiO$_{2}$ redistribution to the grain boundary during the cooling process. The activation energy of grains increased to 1.16 eV after 1 mol% MgO doping, which was caused by the decrease of the oxygen vacancy concentration and the increase of the potential barrier of the grain boundary. |
| Starting Page | 258 |
| Ending Page | 262 |
| Page Count | 5 |
| File Format | |
| ISSN | 13853449 |
| Journal | Journal of Electroceramics |
| Volume Number | 21 |
| Issue Number | 1-4 |
| e-ISSN | 15738663 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2007-05-26 |
| Publisher Place | Boston |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | BST ceramics Impedance spectra Activation energy Defect Crystallography Electrochemistry Characterization and Evaluation of Materials Ceramics, Glass, Composites, Natural Methods Optical and Electronic Materials |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ceramics and Composites Materials Chemistry Mechanics of Materials Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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