Applied Physics A

, 124:389 | Cite as

Effect of microwaves on the synthesis, structural and dielectric properties of Ca-modified BaTiO3 ceramics

  • Abdelaziz Salhi
  • Salah-eddine Sayouri
  • Boujemaa Jaber
  • L-Haj Omari


A pre-heat treatment with a domestic microwave, (MW), performed on gel-dry of sol gel processed Ca-modified BaTiO3, with the chemical formulation Ba1−x Ca x TiO3 such as x = 0, 1, 5, 10, 15, 20 and 30%, has been shown to lower the calcination temperature of these samples and to strongly influence their physicochemical properties. Indeed, X-ray diffraction and Raman characterizations of the samples revealed a gradual change from tetragonal to pseudo cubic phase with increasing x and a predominance of the occupation of the Ti-site for the composition x < 10 and that of the Ba-site for x ≥ 10. Dielectric measurements have shown that the temperature, Tm, of the ferro-to-paraelectric transition is sensitive to the above-mentioned behavior, with a diffuse character of this transition; Tm first decreases for the concentrations in x such as x < = 10 (predominance of occupation of Ti sites) before it increases for the compositions with x > 10 (predominance of occupation of Ba-sites). The thermal behavior of the permittivity has been approached by the modified Uchino’s law, allowing the calculation of the dielectric parameters (diffuseness and relaxation parameters).


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© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Physics, Faculty of Sciences-DMLPTAFez-AtlasMorocco
  2. 2.CNRSTRabatMorocco
  3. 3.Faculty of Sciences Ain Chock Casablanca, Hassan II UniversityCasablancaMorocco

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