Effects of Nb5+ Addition on Microstructure and Dielectric Properties of BaTiO3

Yeon Jung Kim; June Won Hyun

doi:10.5757/ASCT.2017.26.5.143

Article

View

Research Paper

Applied Science and Convergence Technology 2017; 26(5): 143-147

Published online September 30, 2017

https://doi.org/10.5757/ASCT.2017.26.5.143

Effects of Nb⁵⁺ Addition on Microstructure and Dielectric Properties of BaTiO₃

Yeon Jung Kim^{a , *} , and June Won Hyun^b

^aCenter for Innovative Engineering Education, Dankook University, Yongin 16890, Korea, ^bDepartment of Physics, Dankook University, Cheonan 31116, Korea

Correspondence to:E-mail: yjkim80@dankook.ac.kr

Received: September 16, 2017; Revised: September 26, 2017; Accepted: September 28, 2017

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Go to

Abstract

Structural studies on the addition characteristics of Nb ions to BaTiO₃ solid solutions were performed by XRD and SEM/EDS technique. The X-ray diffraction peaks of the (111), (200) and (002) planes of Nb-doped BaTiO₃ solid solutions with different mole% of Nb were analyzed. We also investigated the relationship between the dielectric and structural properties of Nb-doped BaTiO₃. The transition temperatures of BaTiO₃ solid solution doped with 0.5mole%Nb and 1.0 mole%Nb were ~116°C and ~87°C, respectively, which were found to be shifted to very low temperature from the transition temperature of pure BaTiO₃ (about 125°C). As a result of analysis of 1/K versus T and ln[(1/K)-(1/K_m) versus (T-T_m)] of the two compositions used in this experiment, the diffusivity slightly differs from that of pure BaTiO₃ at temperatures above Curie temperature. And this characteristic was analyzed by applying the modified Curie-Weiss law.

Keywords: Nb-doped BaTiO₃, SEM/EDS, Dielectric properties, Modified Curie-Weiss law