The effects of the additive of Eu ions on elastic and electric properties of BaTiO₃ ceramics

ABSTRACT

The BaTiO₃ and BaTiO₃+X%wt.Eu₂O₃ (X = 1, 2, 3) ceramics were prepared by a solid phase reaction. The structural and morphology studies were carried out by means of an X-ray diffraction technique and scanning electron microscopy, respectively. Elastic moduli were determined with the use of an ultrasonic method. The dielectric permittivity (ϵ′) and tanδ as a function of composition and temperature were investigated. The increasing concentration of Eu ions leads to a slight shift of the Curie temperature and changes the characteristics of ϵ′ and tanδ. The structural, mechanical and dielectric properties of the BTEX ceramics were discussed in terms of microstructure and dopants contents.

KEYWORDS:

• Eu-doped barium titanate; mechanical properties; elastic modulus; dielectric properties