Numerical study on dielectric permittivity for the ferroelectric ceramic with composition KTa<sub>0.6</sub>Nb<sub>0.4</sub>O<sub>3</sub>
Langue
en
Article de revue
Ce document a été publié dans
Journal of Alloys and Compounds. 2010, vol. 508, n° 2, p. 453-456
Elsevier
Résumé en anglais
Based on the Debye theory, we have determined the evolution of the dielectric permittivity of the ceramic with composition KTa<sub>0.6</sub>Nb<sub>0.4</sub>O<sub>3</sub> as a function of temperature and frequency. This ...Lire la suite >
Based on the Debye theory, we have determined the evolution of the dielectric permittivity of the ceramic with composition KTa<sub>0.6</sub>Nb<sub>0.4</sub>O<sub>3</sub> as a function of temperature and frequency. This evolution shows that this composition exhibits a ferroelectric–paraelectric phase transition at 360 K with dispersion at high frequencies (10<sup>6</sup>–6 × 10<sup>8</sup> Hz). A comparison between experimental and numeric calculation of dielectric permittivity for this solid solution has been suggested using a Gaussian distribution of the relaxation times, which was introduced in Debye relations. The numerical results were in agreement with experimental data.< Réduire
Mots clés en anglais
Ceramics
Perovskite
Dielectric
Debye theory
Ferroelectric
Origine
Importé de halUnités de recherche