Piezoelectric properties of lead-free piezoelectric ceramics and their energy harvester characteristics

In Tae Seo, Chang Hoi Choi, Daniel Song, Min Soo Jang, Bo Yun Kim, Sahn Nahm, Young Sik Kim, Tae Hyun Sung, Hyun Cheol Song

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

The energy convergence efficiency (η) and dimensionless figure of merit (DFOM) of CuO-added (Na0.5K0.5)NbO3 (CNKN) ceramics are larger than those of NKN ceramics because of their large Q m values and small dielectric losses. Moreover, the η and DFOM values of CNKN ceramics are comparable to those of P-5C ceramics, which exhibit the highest η and DFOM. Furthermore, the CNKN harvester exhibits a high power density of 12 mW/cm3 at 93 Hz with a load resistance of 250 kΩ; this is similar to the PZT-based energy harvester, indicating that the CNKN ceramic is a good candidate material for energy harvesters.

Original languageEnglish
Pages (from-to)1024-1028
Number of pages5
JournalJournal of the American Ceramic Society
Volume96
Issue number4
DOIs
Publication statusPublished - 2013 Apr

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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