Raman spectra and structural stability in B-site manganese doped (Bi0.5Na0.5)0.925Ba0.075TiO3 relaxor ferroelectric ceramics
| Autor: | Chi-Shun Tu, S.-J. Chiu, Cheng-Sao Chen, J. Anthoniappen, Pin-Yi Chen, Yves Idzerda |
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| Rok vydání: | 2015 |
| Předmět: |
X-ray absorption spectroscopy
Materials science Doping chemistry.chemical_element Manganese Synchrotron law.invention Crystallography Tetragonal crystal system symbols.namesake chemistry law Phase (matter) Materials Chemistry Ceramics and Composites symbols Orthorhombic crystal system Raman spectroscopy |
| Zdroj: | Journal of the European Ceramic Society. 35:3495-3506 |
| ISSN: | 0955-2219 |
| Popis: | Soft X-ray absorption (XAS), transmission electron spectroscopy (TEM), Raman spectroscopy, and synchrotron XRD have been studied in B-site 0–2 mol% manganese (Mn) doped (Bi0.5Na0.5)0.925Ba0.075TiO3 (BN7.5BT) relaxor ferroelectric ceramics. High-resolution synchrotron XRD and TEM reveal two phase coexistence of rhombohedral R3c and tetragonal P4bm structures in 0 and 0.2%, and an orthorhombic structure in 1 and 2% Mn-doped BN7.5BT at room temperature. Raman spectra of 0% Mn reveal structural transition from two phase coexistence to tetragonal phase near 190 °C with a softening anomaly, while 0.2–2% Mn-doped BN7.5BT show softening behavior near 290 °C upon heating. Raman spectra and synchrotron XRD indicate that Mn doping can enhance structural thermal stability in BN7.5BT ceramics. |
| Databáze: | OpenAIRE |
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