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Journal of Electroceramics

, Volume 34, Issue 1, pp 28–37 | Cite as

Study of dielectric relaxation and diffuseness character of sol-gel derived Pb1−xLax(Fe0.03Ti0.97)O3 ceramics synthesized at lower temperature for modern nano-technological devices

  • L. H. Omari
  • S. Sayouri
  • T. Lamcharfi
  • L. Hajji
Article

Abstract

Pb1−xLax(Fe0.03Ti0.97)O3 (PLxF3T), (x = 0.04, 0.05, 0.06, 0.07, 0.10, 0.12, 0.14, 0.18 and 0.21), ceramics were synthesized by sol-gel method. XRD patterns indicated that the ceramics have tetragonal structure which transforms to pseudo-cubic structure. MEB micrographs show fine and homogenous spherical nano-metric grains. Dielectric properties were investigated in the frequency range from 1 kHz to 1 MHz.. The Curie temperature decreases with increasing La content into the lattice. The diffusivity and the relaxation strength were estimated using the modified Uchino-law. The relaxation time of these materials was well-adjusted by the Vogel-Fulcher equation.

Keywords

Ceramics Perovskite Sintering Sol-gel Microstructure Relaxor-behavior 

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • L. H. Omari
    • 1
  • S. Sayouri
    • 1
  • T. Lamcharfi
    • 2
  • L. Hajji
    • 3
  1. 1.LPTA, Département de Physique, Faculté des Sciences-DMFès-AtlasMaroc
  2. 2.LSSC Département de Génie Electrique, FSTFèsMaroc
  3. 3.Département de Physique, Faculté des Sciences et techniques guélliseMarrakechMaroc

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