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Research Paper

Applied Science and Convergence Technology 2018; 27(6): 126-129

Published online November 30, 2018

https://doi.org/10.5757/ASCT.2018.27.6.126

Copyright © The Korean Vacuum Society.

Changes in Physical Properties of Ta5+-doped BaTiO3 Solid Solution

Yeon Jung Kim

Center for Innovative Engineering Education, Dankook University, Gyeonggi-do 16890, Korea

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

Received: September 27, 2018; Accepted: October 10, 2018

Abstract

Structural properties for the substitution of Ta5+ ions in the BaTiO3 crystal lattice were observed by SEM/EDS. The formation of perovskite phase and the change of (111), (200) and (002) planes of BaTiO3 solid solution containing a small amount of Ta5+ were studied. As a result, the relationship between the dielectric properties and the polycrystalline structure of Ta5+-doped BaTiO3 was confirmed. It was found that the maximum dielectric constant of the Ta5+-doped BaTiO3 solid solution was more than about 8000, and the transition temperature shifted slightly toward the lower temperature as compared with the pure BaTiO3. The dielectric constants of all the samples measured in the temperature region above the transition temperature showed some diffusivity and satisfied the modified Curie-Weiss law.

PACS numbers: 77.12, 77.64, 77.81

Keywords: Ta5+-doped BaTiO3, Dielectric properties, Modified Curie-Weiss law

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