Abstracts Book - IMRC 2018

• SC2-P017
EFFECT OF THE Sb 5+ CATION ON THE STRUCTURAL,
MICROSTRUCTURAL AND ELECTRICAL PROPERTIES OF THE SOLID
SOLUTION 0.98(K0.48Na0.52)0.95Li0.05Nb(1-x)SbxO3-
0.02Ba0.5(Bi0.5Na0.5)0.5ZrO3
Brenda Carreño Jiménez 1 , Armando Reyes Montero 1 , María Elena Villafuerte Castrejón 1 ,
Rigoberto López Juárez 2
1 Instituto de Investigaciones en Materiales, Metálicos y cerámicos, Mexico. 2 Instituto de
Investigaciones en Materiales (Unidad Morelia), , Mexico.
Potassium-sodium niobate (KNN) is one of the most important candidate for
replacing lead zirconate-titanate (PZT) in many electronic applications, because
both solid solutions have similar piezoelectric and ferroelectric properties and
Curie temperature (TC). Bismuth- sodium zirconate has a high remnant
polarization (Pr) and coercive field (EC). These characteristics promoted some
preliminary research to combine both materials, as well as the addition of other
cations in the A and B sites of the perovskite structure in order to increase T C
and piezoelectric properties (d33, d31, kp). Recent studies show that replacing
cations in the A site with Li 1+ and B site with Sb +5 , promotes a phase coexistence
(rhombohedral -tetragonal) called polymorphic phase transition (PPT).
In this work it is reported the effect of Sb 5+ on structural, microstructural and
electrical properties of the 0.98(K0.48Na0.52)0.95Li0.05Nb(1-x)SbxO3-
0.02Ba0.5(Bi0.5Na0.5)0.5ZrO3(with x=0.04, 0.055, 0.05, 0.06, 0.065, 0.07 and 0.08)
solid solution synthesized by conventional solid state method. The
crystallographic and structural characterization was carried out by X-Ray
diffraction (XRD), scanning electron microscopy (SEM). The electrical properties
of the sintered materials were analyzed at different temperatures and
frequencies. The piezoelectric parameters measured by means of impedance
spectroscopy.
Keywords: antimony, polymorphic phase transition,, piezoelectric properties
Presenting authors email: bcarrenojimenez@gmail.com