Phase diagram of TTB ferroelectric compounds Pb1−xK2xNb2O6
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| 1. | Title | Title of document | Phase diagram of TTB ferroelectric compounds Pb1−xK2xNb2O6 |
| 2. | Creator | Author's name, affiliation, country | E. Choukri; LMCN, F.S.T.G.University Cadi Ayyad Marrakech; Morocco |
| 2. | Creator | Author's name, affiliation, country | Y. Gagou; LPMC, Université de Picardie, 33, rue Saint-Leu, 80039 Amiens Cédex; France |
| 2. | Creator | Author's name, affiliation, country | D. Mezzane; LMCN, F.S.T.G.University Cadi Ayyad Marrakech; Morocco |
| 2. | Creator | Author's name, affiliation, country | M. Elmarssi; LPMC, Université de Picardie, 33, rue Saint-Leu, 80039 Amiens Cédex; France |
| 2. | Creator | Author's name, affiliation, country | Z. Abkhar; LMCN, F.S.T.G.University Cadi Ayyad Marrakech; Morocco |
| 2. | Creator | Author's name, affiliation, country | M. Elaatmani; F.S.S. University Cadi Ayyad Marrakech; Morocco |
| 2. | Creator | Author's name, affiliation, country | I. Luk’yanchuk; LPMC, Université de Picardie, 33, rue Saint-Leu, 80039 Amiens Cédex; France |
| 2. | Creator | Author's name, affiliation, country | P. Saint-Grégoire; L2MP, UMR-CNRS 6137, Université de Toulon-Var, BP 132, 83957 La Garde Cédex; France |
| 3. | Subject | Discipline(s) | |
| 3. | Subject | Keyword(s) | |
| 4. | Description | Abstract | Substitution of Pb with K in the PbNb2O6 phases leads to a new composition of solid solution with chemical composition Pb1−xK2xNb2O6 with x ranging from 0 to 0.34 in steps of 0.05. Ferroelectric ceramics were synthesized using solid state reaction between the corresponding oxides and carbonates. Powders are pressed and heated into ceramics and their compaction is about 92%. The tetragonal tungsten bronze (TTB) structure at room temperature was confirmed by X-ray diffraction (XRD). The temperature dependence of dielectric permittivity was measured from 35 to 600°C in the 20-106 Hz frequency range. Transition temperature decreases with the lead concentration while from x=0, with Tc=600°C and to x=0.3 with Tc=388°C. These measurements permit to present a basical phase diagram of this family compound showing the evolution of the characteristic transition temperature Tc versus temperature. The behaviour of Tc is in agreement with theoretical study of the ferroelectric phase transition in TTB using Monte Carlo (MC) simulation. The dielectric properties of these ceramics are similar to those obtained on a single crystal and illustrate the quality of preparative conditions. |
| 5. | Publisher | Organizing agency, location | |
| 6. | Contributor | Sponsor(s) | |
| 7. | Date | (YYYY-MM-DD) | 21-03-2011 |
| 8. | Type | Status & genre | Peer-reviewed Article |
| 8. | Type | Type | |
| 9. | Format | File format | |
| 10. | Identifier | Uniform Resource Identifier | https://revues.imist.ma/index.php/MJCM/article/view/250 |
| 11. | Source | Title; vol., no. (year) | Moroccan Journal of Condensed Matter; Vol 12, No 2 (2010) |
| 12. | Language | English=en | en |
| 13. | Relation | Supp. Files | |
| 14. | Coverage | Geo-spatial location, chronological period, research sample (gender, age, etc.) | |
| 15. | Rights | Copyright and permissions |
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