Synthesis, structural and dielectric properties of Ce-doped lead lanthanum titanate
- LPMMAT, Faculté des Sciences Ain-Chock, Université Hassan II de Casablanca, 5366 Maârif (Morocco)
- Renewable Energy Laboratory and Dynamic Systems, Faculté des Sciences Ain-Chock, Université Hassan II de Casablanca (Morocco)
- LPTA, Department of Physics, Faculty of Sciences-DM, B.P. 1796 Fez-Atlas (Morocco)
Highlights: • The effect of Ce doping on the structural, dielectric properties and ac conductivity of Pb{sub 0.79-x}Ce{sub x}La{sub 0.21}TiO{sub 3} was studied. • A pseudo-cubic single phase was observed for all samples. • The phase transition temperature is found to decrease with increasing Ce content. • Change of the nature of Pb{sub 0.79}La{sub 0.21}TiO{sub 3} phase transition upon Ce-doping. • Several essential dielectric parameters were extracted. - Abstract: The influence of Ce doping on the structural, dielectric and ac conductivity properties of Pb{sub 0.79-x}Ce{sub x}La{sub 0.21}TiO{sub 3} powders (x = 0, 0.01, 0.03, 0.05 and 0.1) was investigated. X-ray diffraction shows that all samples have the pseudo-cubic crystal structure, in which the tetragonality and cell volume decrease with increasing Ce content. The change of the dielectric constant as a function of temperature demonstrates that the phase transition temperature decreases with the increase of Ce content. Normal behavior of the phase transition from ferroelectric to paraelectric was observed for Ce-doped samples, while the undoped powders exhibit a combination of diffuse phase transition and relaxor behaviors. From electrical conductivity versus 1/T plots, we have determined the activation energy, which was found to increase with increasing Ce concentration.
- OSTI ID:
- 22730374
- Journal Information:
- Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 92; ISSN MRBUAC; ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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