Low temperature dielectric relaxation in complex perovskite BaTi0.8(Ni0.5Nb0.5)0.2O3 ceramics
| Autor: | Faxin Yu, Jingji Zhang, Ludong Ji, Jiangying Wang, Jiwei Zhai, Zhengliang Huang |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Mechanical Engineering Metals and Alloys Analytical chemistry Dielectric Electron spectroscopy Dielectric spectroscopy law.invention symbols.namesake Nuclear magnetic resonance X-ray photoelectron spectroscopy Mechanics of Materials law Materials Chemistry symbols Spectroscopy Raman spectroscopy Electron paramagnetic resonance Perovskite (structure) |
| Zdroj: | Journal of Alloys and Compounds. 606:11-14 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2014.03.187 |
| Popis: | Structure and dielectric properties of complex perovskite BaTi0.8(Ni0.5Nb0.5)0.2O3 ceramics have been investigated by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR) and dielectric spectroscopy. XRD and Raman data show that the BaTi0.8(Ni0.5Nb0.5)0.2O3 ceramics have a superstructure unit cell with Fm 3 ¯ m space group. The dielectric characteristics in the 175–250 K region are confirmed to be an incipient ferroelectric response with frequency dependent relaxation, which is attributed to the Ni Ni 3 + 2 + ′ - V O · · dipolar defect. |
| Databáze: | OpenAIRE |
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