Effect of Mg on the Dielectric Properties of BaTiO3 Ceramic Materials Produced by Sol-Gel Process: (Ba1-xMgxTiO3)

EasyChair Preprint 8838

Abstract

In this work the effect of doping with magnesium on the structural and physical properties of BaTiO₃ were studied. The ceramic materials of composition Ba_1-xMg_xTiO₃ were prepared by the sol-gel process at low sintering temperature (700°C).

In our preparation, Ba_1-xMg_xTiO₃ were synthesized using magnesium acetate Mg(CH₃COO)₂,3H₂O, titanium alkoxide Ti[OCH(CH₃)₂]₄ and Barium acetate (Ba(CH₃COO)₂.

Analysis of the various RX spectra obtained shows the appearance of three distinct domains.

       The first domain ranges from x=0 to 0.15, the second domain ranges from x=0.2 to 0.8 and the last domain for x ≥ 0.9.

The analysis of the Raman spectra of BaMg_xTiO₃ compounds shows the presence of three domains confirming the results obtained by XRD.

The difference of the rays and the atomic numbers between Ba and Mg, causes the progressive distortion of the quadratic mesh to the pseudo cubic phase.

Dielectric measurements (ε_r) were performed using an impedance analyzer HP 4284A in the frequency range from 1kHz to 1.8MHz depending on the temperature, ranging from ambient up to 200 °C, with a heating rate of 5°C / min.

When the level of the magnesium inserted increases (figure), the peaks of the transition from the ferroelectric phase to the para-electric phase become more and more spread out. It is also observed that the value of Tm remains independent of the frequency.

Keyphrases: Ceramic, Dielectric properties, Doping BMxT, sol-gel

@booklet{EasyChair:8838,
  author    = {Ouafae El Ghadraoui and Mohammed Zouhairi and El Houcine Lahrar and Ahmed Harrach and Lamcharfi Taj Edine and Farid Abdi},
  title     = {Effect of Mg on the Dielectric Properties of BaTiO3 Ceramic Materials Produced by Sol-Gel Process: (Ba1-xMgxTiO3)},
  howpublished = {EasyChair Preprint 8838},
  year      = {EasyChair, 2022}}