Optimized physical properties of [001]-textured (Na, K)NbO3-based lead-free piezoceramics for high power piezoelectric energy harvesters

Seok June Chae, Seung Hyun Kim, In Su Kim, Geun Soo Lee, Seok Jung Park, Sahn Nahm

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The output power of piezoelectric energy harvesters is influenced by the kp and d33 × g33 of the piezoceramics. The untextured 0.96(Na0.5K0.5)(Nb1−xSbx)O3-0.01CaZrO3-0.03(Bi0.5Ag0.5)ZrO3 [NK(N1−xSx)-CZ-BAZ] exhibited a low kp and d33 × g33 owing to its small d33 and large ϵT330. The [001]-textured x = 0.01 composition exhibited an enhanced kp (0.73) and d33 × g33 (32.2 × 10−12 m2 N−1) owing to the increased d33 and decreased ϵT330. The domain of the textured NK(N1−xSx)-CZ-BAZ changed from microdomains to nanodomains and polar nanoregions with an increasing x, and the altered domain structure affected the piezoelectric properties of the samples. The harvester fabricated using the [001]-textured x = 0.01 composition exhibited high power (2.7 mW) and a large power density (6.72 mW cm−3), which is similar to the largest power density obtained from harvesters fabricated using NKN-related ceramics. Therefore, the [001]-textured NK(N0.99S0.01)-CZ-BAZ is a promising option for application in harvesters, and the [001]-texturing technique proves to be an efficient method for developing piezoceramics for use in harvesters.

Original languageEnglish
Pages (from-to)1268-1280
Number of pages13
JournalJournal of Materials Chemistry C
Volume12
Issue number4
DOIs
Publication statusPublished - 2023 Dec 11

Bibliographical note

Publisher Copyright:
© 2024 The Royal Society of Chemistry.

ASJC Scopus subject areas

  • General Chemistry
  • Materials Chemistry

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