Articles
  • K(Ta0.60,Nb0.40)O3/K(Ta0.40,Ta0.60)O3 heterolayered thin films for electrocaloric cooling device

  • Jiwon Kima, Jooseok Parkb and Sunggap Leea,*

  • aDepartment of Materials Engineering and Convergence Technology, RIGET, Gyeongsang National University, JinJu 52828, Republic of Korea
    bBusiness Cooperation Center, Korea Institute of Ceramic Engineering and Technology, Jinju 52851, Republic of 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

In this study, K(Ta0.60,Nb0.40)O3/K(Ta0.40,Ta0.60)O3 heterolayered thin films were fabricated by spin coating method. KTN specimens were manufactured according to the number of coatings and were investigated in order to apply to cooling devices. KTN heterolayered thin films showed a polycrystalline KTN X-ray patterns with some pyrochlore phase. For the six-layer coated thin film of KTN, the values of dielectric constant, dielectric loss, remanent polarization and coercive field were 1423, 0.64, 19.94 μC/cm2 and 37.64 kV/cm at 28 oC. When a voltage of 330 kV/cm was applied to the 3 times coated KTN films, the electrocaloric property was 3 oC. When a voltage of 330 kV/cm was applied, the value of the electrocaloric temperature change (ΔT of the three-layer coated thin film


Keywords: Potassium tantalite niobate, Electrocaloric effect, Thin film, Solgel method.

This Article

  • 2021; 22(1): 48-53

    Published on Feb 28, 2021

  • 10.36410/jcpr.2021.22.1.48
  • Received on Jun 12, 2020
  • Revised on Sep 2, 2020
  • Accepted on Aug 22, 2020

Correspondence to

  • Sunggap Lee

  • Department of Materials Engineering and Convergence Technology, RIGET, Gyeongsang National University, JinJu 52828, Republic of Korea
    Tel : +82-10-2686-4427 Fax: +82-55-772-1689

  • E-mail: lsgap@gnu.ac.kr