TITLE:
Effect of Zr on Structural and Dielectrical Properties of (Ba0.9Mg1.0)(ZrxTi1-x)O3 Ceramics
AUTHORS:
Sankararao Gattu, Venuturupalli Durga Prasadu, Kocharlakota Venkata Ramesh
KEYWORDS:
Lead Free Ceramics, BaTiO3, Dielectric Materials, Impedance, XRD, SEM
JOURNAL NAME:
Advances in Materials Physics and Chemistry,
Vol.5 No.10,
October
21,
2015
ABSTRACT: Barium
titanate, BaTiO3 (BTO) is the most common ferro electric material, which
is used to manufacture electronic components such as multilayer capacitors, positive
temperature coefficient thermistors, piezo electric transdures, and ferro electric
memory. Zr doped barium magnesium titanate (Ba0.9Mg1.0)(ZrxTi1-x)O3 (with x = 0.10, 0.20, 0.40 (BMZT 10, BMZT 20 and BMZT 40) perovskite is prepared
by conventional solid state reaction method. The starting raw materials were BaCO3,
TiO2, MgO and ZrO2. The XRD study at room temperature suggests
that these have cubic and tetragonal symmetry phases. The behavior of the measured
dielectric permittivity and dielectric loss with temperature and frequency reveals
that the materials undergo a diffuse para-ferroelectric phase transition and are
of the relaxor type. The crystal structure, surface morphology and dielectric properties
of Zr and Mg doped barium titanate ceramics were investigated. Zr4+ and
Mg2+ ions have entered the unit cell maintaining the perovskite structure
of solid solution without the evidence of any additional phase when Mg content
is 0.1 mole% and the Zr content is 0.10, 0.20 and 0.40 mole%.