Effect of LiSbO3 and SrZrO3 doping on the piezoelectric properties and microstructural behavior of K0.5Na0.5NbO3 ceramics

Wooseop Shin, Sumi Kim, Eunji Kim, Dokyum Kim, Seong Uk Oh, Jung A. Lee, Young Woo Heo, Joon Hyung Lee, Sahn Nahm

Research output: Contribution to journalArticlepeer-review

Abstract

The effect of LiSbO3 and SrZrO3 doping on the piezoelectric characteristics of K0.5Na0.5NbO3-based ceramics was studied. First, (1 − x)K0.5Na0.5NbO3–xLiSbO3–CuO (0.00 ≤ x ≤ 0.07) was synthesized and a single phase of perovskite was observed in the range of 0.00 ≤ x ≤ 0.05. As LiSbO3 content increased, the orthorhombic single phase changed to orthorhombic and tetragonal multiphase. TO–T decreased from 176 °C (x = 0.00) to 85 ℃ (x = 0.05) and, the d33 showed the highest value of 156 pC/N (x = 0.05). Next, (0.95K0.5Na0.5NbO3–0.05LiSbO3)–xSrZrO3–CuO (0.00 ≤ x ≤ 0.05) was studied. All compositions were well synthesized as perovskite phases; orthorhombic and tetragonal mixed phases up to x = 0.02, rhombohedral, orthorhombic, and tetragonal mixed phases at x = 0.03 and 0.04; and rhombohedral and tetragonal phases at x = 0.05. TO–T decreased from 78 ℃ (x = 0.00) to 32 ℃ (x = 0.04), and TR–T was formed at 48 ℃ (x = 0.05). The d33 value at x = 0.04 was 288 pC/N and significantly reduced to 134 pC/N at x = 0.05.

Original languageEnglish
Pages (from-to)316-326
Number of pages11
JournalJournal of the Korean Ceramic Society
Volume61
Issue number2
DOIs
Publication statusPublished - 2024 Mar

Bibliographical note

Publisher Copyright:
© The Korean Ceramic Society 2024.

Keywords

  • Doping
  • KNN-based
  • Lead-free piezoelectric ceramics
  • Phase transition
  • Piezoelectricity

ASJC Scopus subject areas

  • Ceramics and Composites

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