Comparison of Lanthanum and Bismuth modification of lead Zirconate-Lead Titanate PZT—A structural and dielectric study
| Autor: | Franz-Andreas Mautner, Klaus Reichmann, B. Bitschnau, Theresa Kainz |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science Inorganic chemistry Analytical chemistry chemistry.chemical_element 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Lead zirconate titanate 01 natural sciences Ferroelectricity Zirconate Bismuth chemistry.chemical_compound chemistry 0103 physical sciences Materials Chemistry Ceramics and Composites Lanthanum Orthorhombic crystal system Lead titanate 0210 nano-technology |
| Zdroj: | Journal of the European Ceramic Society. 36:507-514 |
| ISSN: | 0955-2219 |
| Popis: | Lead Zirconate Titanate (PZT) ceramics Pb 1−1.5 x Bi x V Pb ′′ 0.5 x Zr 0.90 Ti 0.10 O 3 containing Bismuth ( x = 0.005–0.12) were structurally and dielectrically characterized. Results are compared to Lanthanum modified Pb 1−1.5 x La x V Pb ′′ 0.5 x Zr 0.90 Ti 0.10 O 3 , ( x = 0.01–0.08) ceramics. For Bi a solubility limit is observed at x = 0.04. The Lanthanum-doped series proved to be single phase in the investigated range. Lanthanum doping leads to a continuous reduction of cell volume causing a change from rhombohedral to orthorhombic symmetry at x = 0.03 accompanied by switching from ferroelectric to antiferroelectric behaviour. Such a change was not observed with Bismuth. This might be due to the fact that a critical cell volume necessary for structural transition could not be achieved within the solubility range. For Lanthanum doped PZT with x = 0.03 orthorhombic structure was determined already at room temperature, but with ferroelectric polarization curve, which switched to antiferroelectric polarization at 120 °C. This raises new questions on the appearance and stability of antiferroelectric ordering. |
| Databáze: | OpenAIRE |
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