Articles
  • Effect of K2CO3 additive on crystallinity and piezoelectric properties of KNNS-BZ-BKH ceramics

  • Lihaowen Zenga, Rabie Beniouba and Kenji Itakab,*

  • aGraduate School of Science and Technology, Hirosaki University, 1 Bunkyo-cho, Hirosaki, Aomori, 036-8560, Japan
    bInstitute of Regional Innovation, Hirosaki University, 2-1-3, Matsubara, Aomori, 030-0813, Japan

  • 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, the piezoelectric ceramics, (0.955) K0.48Na0.52Nb0.9Sb0.1O3-(0.025) BaZrO3-(0.02) Bi0.5K0.5HfO3 (KNNS-BZ-BKH) with m mol% K2CO3 additives in the range of m = 0.0 to 3.96 have been successfully fabricated using the solid-state reaction method. The effect of K2CO3 on the sintering behavior, structure, microstructure, and electrical properties of KNNS-BZ-BKH ceramics was investigated. The experimental results showed that the addition of K2CO3 improved the sintering process of KNNS-BZ-BKH, which exhibited a well-sintered ceramic with a dense and pure perovskite structure stoichiometrically. At an optimal sintering temperature of 1210 oC and K2CO3 content of 2.64 mol%, enhanced physical properties of the ceramics such as density 4.0 g cm-3 and piezoelectric constant d33 = 75 pC/N were obtained through enhancement of KNNS-BZ-BKH microstructures with the best results exhibiting a pure perovskite phase with no secondary phases due to crystallinity improvement


Keywords: KNN-based, Ceramics, Crystallinity, Piezoelectric, Lead-free

This Article

  • 2022; 23(1): 62-68

    Published on Feb 28, 2022

  • 10.36410/jcpr.2022.23.1.62
  • Received on Oct 10, 2021
  • Revised on Oct 23, 2021
  • Accepted on Oct 30, 2021

Correspondence to

  • Kenji Itaka

  • Institute of Regional Innovation, Hirosaki University, 2-1-3, Matsubara, Aomori, 030-0813, Japan
    Tel : +81-17-762-7760 Fax: +81-17-735-5411

  • E-mail: itaka@hirosaki-u.ac.jp