Articles
  • The effects of particle sizes on crystal structure and diffusivity in 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics

  • In-Ho Ima and Seung-Hwan Leeb,*

  • aDept. of Electrical Engineering, Shin Ansan University, Gyeonggi-do, Korea
    bDept. of Battery Convergence Engineering, Kangwon National University, Gangwon State, Korea

  • This article 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

We prepared powders with different particle sizes using various secondary milling times to fabricate 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 (0.95NKN-0.05BT) by the conventional solid-state reaction. As secondary milling time of the powders was changed from 0 to 72 hours, the particle sizes of the powder with composition of 0.95NKN-0.05BT were significantly decreased from 14μm to submicron. As a results, the tetragonality (c/a) and the Curie temperatures (TC) was slightly increased. The diffusivities(γ) of 0.95NKN-0.05BT ceramics were sharply decreased when the particle sizes of powders with composition of 0.95NKN-0.05BT were decreased from 14μm to submicron. The phase transition characteristic of 0.95NKN-0.05BT ceramics shifted from relaxor-like ferroelectric to a normal ferroelectric as particle size of powder decreased from several micrometer to submicron in 0.95NKN-0.05BT ceramics.


Keywords: (NaK)NbO3-BaTiO3, Particle size, Diffusivity, Crystal structure.

This Article

  • 2025; 26(1): 157-161

    Published on Feb 28, 2025

  • 10.36410/jcpr.2025.26.1.157
  • Received on Aug 21, 2024
  • Revised on Jan 8, 2025
  • Accepted on Jan 10, 2025

Correspondence to

  • Seung-Hwan Lee

  • Dept. of Battery Convergence Engineering, Kangwon National University, Gangwon State, Korea
    Tel : +82-33-250-6265

  • E-mail: shlee@kangwon.ac.kr