التفاصيل البيبلوغرافية
| العنوان: |
Studies on Structural and Dielectric Relaxation of Disordered Barium Titanate due to La3+ Doping. |
| المؤلفون: |
Jebli, Marwa, Dhahri, J., Albedah, Mohammed A., Alresheedi, Nadi Mlihan, Belmabrouk, Hafedh |
| المصدر: |
Journal of Inorganic & Organometallic Polymers & Materials; Apr2024, Vol. 34 Issue 4, p1765-1775, 11p |
| مصطلحات موضوعية: |
BARIUM titanate, X-ray powder diffraction, PERMITTIVITY, GOODNESS-of-fit tests, ACTIVATION energy, PHASE transitions, DIELECTRIC relaxation |
| مستخلص: |
Ba0.97La0.02TiO3 (BLT) ceramic has been prepared by the predictable Molten-Salt process. The structural analyses of the BLT powders were done at room temperature by X-ray powder diffraction. The compound crystallizes with tetragonal symmetry. The dependence of the dielectric constant on temperature for various frequencies (1 kHz–1 MHz) has been determined. The diffuse transition is observed in the variation of the dielectric constant, and it provides evidence for three relaxor characteristics. Three relaxor parts are represented, such as [350 < T < 450; defines relaxor (1), 450 < T < 550; labels relaxor (2), 550 < T < 700; identifies relaxor (3)]. To comprehend the relaxation behavior of the prepared ceramic, three distinct techniques, specifically Debye, Vogel–Fulcher (V–F), and Power low, were utilized. Using the Debye, V–F, and Power law models, the activation energy, Debye frequency, and freezing temperature were derived from the experimental data. The available values are within an acceptable range and provide a clear explanation for the prepared sample's strong relaxation characteristics. The V–F model is found to be more suitable to explain the relaxation process of the prepared ceramic based on the goodness of fit parameter. Characteristically, this study highlights the relaxation process in the lead-free BLT system. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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