Study of the structural and electrical behavior of Bi(Mg,Ti)O3 modified (Ba,Ca)TiO3 ceramics

Author:

Shamim Md. Kashif1,Sharma Seema1,Singh Arpana1,Rai Radheshyam2,Rani Rashmi1

Affiliation:

1. Ferroelectric Research Laboratory, Department of Physics, A. N. College, Patna 800013, India

2. School of Physics and Materials Science, Shoolini University, Solan, Himachal Pradesh, India

Abstract

The ability of BaTiO3 to form solid solutions with different dopants (both iso- and aliovalent) makes it versatile for various applications. In the present study, (Ba,Ca)TiO3 (BCT) is modified with Bi(MgTi)O3 (BMT) in search for new lead-free ferroelectric material and improve their properties. For this purpose, BCT acts as a main base material and BMT acts as a modifier to fabricate a multifunctional material. In this study, we report the structural and electrical properties of lead free piezo-ceramics ([Formula: see text])(Ba[Formula: see text]Ca[Formula: see text])TiO3–[Formula: see text]Bi(Mg[Formula: see text]Ti[Formula: see text])O3 with [Formula: see text], 0.4, 0.5 prepared by solid-state sintering technique. Single perovskite phase with tetragonal structure is obtained for all the compositions, which is reconfirmed by the Raman Spectroscopic study. Dielectric study confirm the temperature stable behavior of the dielectric permittivity values above 300[Formula: see text]C. The dielectric constant value decreases with increase in BMT doping content. Impedance Spectroscopic study confirms non-Debye type dielectric relaxation in the specimen. The Nyquist plot and conductivity studies show the negative temperature coefficient of resistance behavior (NTCR) of the samples.

Publisher

World Scientific Pub Co Pte Lt

Subject

Electrical and Electronic Engineering,Condensed Matter Physics,Ceramics and Composites,Electronic, Optical and Magnetic Materials

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