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Study of structural and electrical properties of Zn-doped barium titanate ceramics synthesized by conventional solid-state method

EHSAN UL HAQ1, MUHAMMAD RAMZAN ABDUL KARIM2,* , KHURRAM IMRAN KHAN2,* , WASEEM AKRAM1, SYED SHABBAR HASSAN1, FAHAD KASHIF1

Affiliation

  1. Department of Metallurgical and Materials Engineering, University of Engineering and Technology, Lahore-54890, Pakistan
  2. Faculty of Materials and Chemical Engineering, GIK Institute of Engineering Sciences and Technology, Topi-23640, Pakistan

Abstract

Barium Titanate (BaTiO3) is a prominent ceramic material with piezoelectric and ferroelectric properties. Despite having the wide range of applications in actuators, optoelectronics and capacitors, the high response time and dielectric losses in BaTiO3 limit its efficient utilization. Zinc oxide (ZnO) has been a dopant of choice in several studies for controlling grain growth behavior and dielectric properties of piezoelectric materials. In this study, various ZnO concentrations ranging from 0.02 wt.% to 0.08 wt.% were added in barium titanate (BaTiO3) through conventional solid-state method followed by sintering at 1150 oC for 2 hours. In X-ray diffraction (XRD) analysis, no secondary phase has been detected for all dopant concentrations showing that all ZnO added had been incorporated in BaTiO3 to form the solid solution with chemical formulation of BaZnxTi1-xO3. The complex impedance spectroscopy (CIS) showed that the highest dipolar and interfacial polarization/ capacitance of more than 50 F was exhibited by 0.06 wt. % ZnO doped BaTiO3. This composition is ideal for capacitive applications particularly at frequencies above 1000KHz..

Keywords

Barium titanate, Electrical properties, Dielectrics, Structural analysis, Impedance spectroscopy.

Submitted at: Sept. 30, 2019
Accepted at: Feb. 11, 2022

Citation

EHSAN UL HAQ, MUHAMMAD RAMZAN ABDUL KARIM, KHURRAM IMRAN KHAN, WASEEM AKRAM, SYED SHABBAR HASSAN, FAHAD KASHIF, Study of structural and electrical properties of Zn-doped barium titanate ceramics synthesized by conventional solid-state method, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 1-2, pp. 69-73 (2022)