Dielectric-spectroscopic and a.c. conductivity studies on layered Na2-XKXTi3O7 (X=0.2, 0.3, 0.4) ceramics
| العنوان: | Dielectric-spectroscopic and a.c. conductivity studies on layered Na2-XKXTi3O7 (X=0.2, 0.3, 0.4) ceramics |
|---|---|
| المؤلفون: | Shripal, Jitendra Kumar, Deepam Maurya |
| المصدر: | Journal of Physics and Chemistry of Solids. 66:1614-1620 |
| بيانات النشر: | Elsevier BV, 2005. |
| سنة النشر: | 2005 |
| مصطلحات موضوعية: | Permittivity, Materials science, Condensed matter physics, Electrical resistivity and conductivity, Ionic conductivity, General Materials Science, Dielectric loss, General Chemistry, Dielectric, Conductivity, Condensed Matter Physics, Thermal conduction, Polaron |
| الوصف: | The dependence of loss tangent (tanδ) and relative permittivity (er) on temperature and frequency has been reported for Na2-XKXTi3O7 (with X=0.2, 0.3, 0.4) ceramics. The losses are characteristic of dipole mechanism and electrical conduction. The peaks of er at high temperature indicate a possible ferroelectric phase transition for all three compositions. The results of a.c. conductivity studies on the same samples have also been reported. The corresponding ln(σT) versus 1000/T plots have been divided into five regions namely I, II, III, IV and V. The various conduction mechanisms in the different regions have been stressed. Furthermore, the log(σ) versus frequency plots for all the above samples reveal that the electronic hopping (polaron) conduction, which diminishes with the rise in temperature, is dominant in the lower temperature region. The interlayer ionic conduction seems to play a major role in conduction towards higher temperature. |
| تدمد: | 0022-3697 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::aef83ccb2532b4ea64c45718b08f4d27Test https://doi.org/10.1016/j.jpcs.2005.05.080Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........aef83ccb2532b4ea64c45718b08f4d27 |
| قاعدة البيانات: | OpenAIRE |
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