التفاصيل البيبلوغرافية
| العنوان: |
Phase transition in ABi4Ti4O15 (A=Ca,Sr,Ba) Aurivillius oxides prepared through a soft chemical route |
| المؤلفون: |
Rout, S. K., Sinha, E., Hussian, A., Lee, J. S., Ahn, C. W., Kim, I. W., Woo, S. I. |
| المصدر: |
Journal of Applied Physics ; volume 105, issue 2 ; ISSN 0021-8979 1089-7550 |
| بيانات النشر: |
AIP Publishing |
| سنة النشر: |
2009 |
| الوصف: |
A series of compounds, CaBi4Ti4O15 (CBT), SrBi4Ti4O15 (SBT), and BaBi4Ti4O15 (BBT), belonging to the Aurivillus-type structure (four layers) has been prepared by a modified chemical route. Different oxalates were precipitated from their respective nitrate solution onto the surface of TiO2 powders. The room temperature x-ray diffraction study reveled that the compounds were having orthorhombic symmetry. Considering the tolerance factor, a significant deformation of the perovskite block is observed and that decreases with increase in ionic radius of A site atom. Temperature dependent dielectric study showed normal ferroelectric to paraelectric transition well above the room temperature except for BBT. The BBT ceramic showed a relaxorlike behavior near phase transition. The quantitative characterization and comparison of relaxor behavior were based on empirical parameters γ and ΔTres. The dielectric relaxation rate follows the Vogel–Fulcher relation with activation energy=0.02 eV and freezing temperature=362 °C. All these measurements confirmed its relaxorlike phase transition. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| DOI: |
10.1063/1.3068344 |
| DOI: |
10.1063/1.3068344/15032440/024105_1_online.pdf |
| الإتاحة: |
https://doi.org/10.1063/1.3068344Test |
| رقم الانضمام: |
edsbas.21F995EA |
| قاعدة البيانات: |
BASE |
