Study of Structural, Dielectric, and Phase Transition of Strontium Doped BaTiO 3

Asmaa Zouitine; Abdelhak El Ghandouri; Abdelhalim Elbasset; Farid Abdi; Taj-dine Lamcharfi; Hicham Laribou; Lamiae Mrharrab; Zouhairi Mohammed

doi:10.22146/ijc.93659

Study of Structural, Dielectric, and Phase Transition of Strontium Doped BaTiO₃

https://doi.org/10.22146/ijc.93659

Asmaa Zouitine⁽¹⁾, Abdelhak El Ghandouri⁽²⁾, Abdelhalim Elbasset^(3*), Farid Abdi⁽⁴⁾, Taj-dine Lamcharfi⁽⁵⁾, Hicham Laribou⁽⁶⁾, Lamiae Mrharrab⁽⁷⁾, Zouhairi Mohammed⁽⁸⁾

(1) Laboratory of Instrumentation of Measure and Control (LIMC), Department of Physics, Faculty of Sciences, University Chouaib Doukali, El Jadida 24000, Morocco
(2) LPAIS, Faculty of Science Dhar El Mahraz, Sidi Mohamed Ben Abdellah University of Fez, Fez 30050, Morocco
(3) LPAIS, Faculty of Science Dhar El Mahraz, Sidi Mohamed Ben Abdellah University of Fez, Fez 30050, Morocco; Signals, Systems and Components Laboratory (LSSC), Faculty of Sciences and Technologies of Fez, Sidi Mohamed Ben Abdellah University, Fez 30050, Morocco
(4) Signals, Systems and Components Laboratory (LSSC), Faculty of Sciences and Technologies of Fez, Sidi Mohamed Ben Abdellah University, Fez 30050, Morocco
(5) Signals, Systems and Components Laboratory (LSSC), Faculty of Sciences and Technologies of Fez, Sidi Mohamed Ben Abdellah University, Fez 30050, Morocco
(6) Laboratory for Microstructures and Materials Mechanics, University of Lorraine, Metz 57070, France
(7) LPAIS, Faculty of Science Dhar El Mahraz, Sidi Mohamed Ben Abdellah University of Fez, Fez 30050, Morocco
(8) Team of Materials, Membranes and Separation Processes, Faculty of Sciences, Moulay Ismail University of Meknes, Meknes 50060, Morocco
(*) Corresponding Author

Abstract

In this paper, we studied the effect of strontium doping on the structural, microstructural, dielectric, and electrical properties of Ba_1-xSr_xTiO₃ (BS_xT) ceramics prepared via the sol-gel method, with x = 0.00 to 0.15. The results obtained from the X-ray diffraction spectrum confirmed the creation of the pure perovskite structure, with the diffraction peaks of the BS_xT shifting toward the bigger 2θ with increasing Sr content. Scanning electron microscopy images show that the grain size of the BS_xT ceramics decreases with increasing Sr content. An increase in Sr content appears to lower the activation energy by the factor of 0.16 meV/mol% and to decrease Curie temperature by the factor of 3.34 °C/mol%. Furthermore, in case of 15 mol% of Sr addition, the dielectric constant value is increased about twice. Moreover, the relationship between grain sizes and dielectric properties was also investigated. Using the frequency measurement method (up to 2 MHz in a step of 1 kHz), we are able to determine the temperature of transition without using the conventional method.

Keywords

Ba1-xSrxTiO3; frequency of relaxation; phase transition; activation energy; dielectric properties

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DOI: https://doi.org/10.22146/ijc.93659